DATASHEET ISL21080 FN6934 300nA NanoPower Voltage References Rev.7.00 Sep 28, 2018 The ISL21080 analog voltage references feature low supply Features voltage operation at ultra-low 310nA typical, 1.5µA maximum operating current. Additionally, the ISL21080 family features • Reference output voltage . . . . . . . . 0.900V, 1.024V, 1.250V, ensured initial accuracy as low as ±0.2% and 50ppm/°C 1.500V, 2.048V, 2.500V, 3.000V, 3.300V, 4.096V, 5.000V temperature coefficient. • Initial accuracy: These references are ideal for general purpose portable - ISL21080-09 and -10 . . . . . . . . . . . . . . . . . . . . . . . . . ±0.7% applications to extend battery life at lower cost. The ISL21080 - ISL21080-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.6% is provided in the industry standard 3 Ld SOT-23 pinout. - ISL21080-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.5% The ISL21080 output voltages can be used as precision - ISL21080-20 and -25 . . . . . . . . . . . . . . . . . . . . . . . . . ±0.3% voltage sources for voltage monitors, control loops, standby - ISL21080-30, -33, -41, and -50 . . . . . . . . . . . . . . . . . ±0.2% voltages for low power states for DSP, FPGA, Datapath Controllers, microcontrollers, and other core voltages: 0.9V, • Input voltage range: 1.024V, 1.25V, 1.5V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and - ISL21080-09 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0V to 5.5V 5.0V. - ISL21080-10, -12, -15, -20 and -25. . . . . . . . . 2.7V to 5.5V Special Note: Post-assembly X-ray inspection may lead to permanent - ISL21080-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2V to 5.5V changes in device output voltage and should be minimized or - ISL21080-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5V to 5.5V avoided. For further information, see “Applications Information” on page15 and AN1533, “X-Ray Effects on Intersil FGA References”. - ISL21080-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V to 8.0V - ISL21080-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V to 8.0V Applications • Output voltage noise . . . . . . . . . . . . .30µVP-P (0.1Hz to 10Hz) • Energy harvesting applications •Supply current . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5µA (max) • Wireless sensor network applications •Tempco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50ppm/°C • Low power voltage sources for controllers, FPGA, ASICs, or logic devices • Output current capability . . . . . . . . . . . . . . . . . . . . . . . . ±7mA • Battery management/monitoring • Operating temperature range. . . . . . . . . . . . .-40°C to +85°C • Low power standby voltages • Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Ld SOT-23 • Portable Instrumentation • Pb-Free (RoHS compliant) • Consumer/medical electronics Related Literature • Wearable electronics • Lower cost industrial and instrumentation For a full list of related documents, visit our website: • Power regulation circuits •ISL21080 family product page • Control loops and compensation networks • LED/diode supply 500 UNIT 1 400 UNIT 2 300 UNIT 3 A) n (N 200 I 100 0 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) FIGURE 1. IIN vs VIN, THREE UNITS FN6934 Rev.7.00 Page 1 of 23 Sep 28, 2018

ISL21080 Pin Configuration Pin Descriptions 3 LD SOT-23 TOP VIEW PIN NUMBER PIN NAME DESCRIPTION 1 VIN Input Voltage Connection VIN 1 2 VOUT Voltage Reference Output 3 GND 3 GND Ground Connection VOUT 2 Ordering Information PART PART NUMBER MARKING VOUT OPTION GRADE TEMP. RANGE TAPE AND REEL PACKAGE PKG. (Notes2, 3) (Note4) (V) (%) (°C) (UNITS) (Note1) (RoHS Compliant) DWG. # ISL21080DIH309Z-TK BCLA 0.9 ±0.7 -40 to +85 1k 3 Ld SOT-23 P3.064A ISL21080DIH310Z-TK BCMA 1.024 ±0.7 -40 to +85 1k 3 Ld SOT-23 P3.064A ISL21080DIH312Z-TK BCNA 1.25 ±0.6 -40 to +85 1k 3 Ld SOT-23 P3.064A ISL21080CIH315Z-TK BCDA 1.5 ±0.5 -40 to +85 1k 3 Ld SOT-23 P3.064A ISL21080CIH315Z-T7A BCDA 1.5 ±0.5 -40 to +85 250 3 Ld SOT-23 P3.064A ISL21080CIH320Z-TK BCPA 2.048 ±0.3 -40 to +85 1k 3 Ld SOT-23 P3.064A ISL21080CIH325Z-TK BCRA 2.5 ±0.3 -40 to +85 1k 3 Ld SOT-23 P3.064A ISL21080CIH330Z-TK BCSA 3.0 ±0.2 -40 to +85 1k 3 Ld SOT-23 P3.064A ISL21080CIH333Z-TK BCTA 3.3 ±0.2 -40 to +85 1k 3 Ld SOT-23 P3.064A ISL21080CIH341Z-TK BCVA 4.096 ±0.2 -40 to +85 1k 3 Ld SOT-23 P3.064A ISL21080CIH350Z-TK BCWA 5.0 ±0.2 -40 to +85 1k 3 Ld SOT-23 P3.064A ISL2108009EV1Z ISL21080DIH309Z Evaluation Board ISL2108010EV1Z ISL21080DIH310Z Evaluation Board ISL2108012EV1Z ISL21080DIH312Z Evaluation Board ISL2108015EV1Z ISL21080DIH315Z Evaluation Board ISL2108020EV1Z ISL21080DIH320Z Evaluation Board ISL2108025EV1Z ISL21080DIH325Z Evaluation Board ISL2108030EV1Z ISL21080DIH330Z Evaluation Board ISL2108033EV1Z ISL21080DIH333Z Evaluation Board ISL2108040EV1Z ISL21080DIH341Z Evaluation Board ISL2108050EV1Z ISL21080DIH350Z Evaluation Board NOTES: 1. Refer to TB347 for details about reel specifications. 2. These Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), refer to the ISL21080DIH309, ISL21080DIH310, ISL21080DIH312, ISL21080CIH315, ISL21080CIH320, ISL21080CIH325, ISL21080CIH330, ISL21080CIH333, ISL21080CIH341, and ISL21080CIH350 product information pages. For more information about MSL, see TB363. 4. The part marking is located on the bottom of the part. FN6934 Rev.7.00 Page 2 of 23 Sep 28, 2018

ISL21080 Absolute Maximum Ratings Thermal Information Max Voltage Thermal Resistance (Typical) JA (°C/W) JC (°C/W) VIN to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6.5V 3 Lead SOT-23 (Notes6, 7). . . . . . . . . . . . . . 275 110 VIN to GND (ISL21080-41 and 50 only) . . . . . . . . . . . . . . .-0.5V to +10V Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .+107°C VOUT to GND (10s). . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to VOUT +1V Continuous Power Dissipation (TA = +85°C) . . . . . . . . . . . . . . . . . . .99mW VOUT to GND (10s) Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C ISL21080-41 and 50 only. . . . . . . . . . . . . . . . . . . . . . -0.5V to +5.1V Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493 ESD Ratings Human Body Model (Tested to JESD22-A114). . . . . . . . . . . . . . . . . . 5kV Recommended Operating Conditions Machine Model (Tested to JESD22-A115). . . . . . . . . . . . . . . . . . . . .500V Charged Device Model (Tested to JESD22-C101). . . . . . . . . . . . . . . . 2kV Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C Latch-Up (Tested per JESD-78B; Class 2, Level A) . . . . . . . . . . . . . . 100mA Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.7V to 5.5V Environmental Operating Conditions X-Ray Exposure (Note5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mRem CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty. NOTES: 5. Measured with no filtering, distance of 10” from source, intensity set to 55kV and 70µA current, 30s duration. Other exposure levels should be analyzed for Output Voltage drift effects. See “Applications Information” on page15. 6.  is measured with the component mounted on a high-effective thermal conductivity test board in free air. See TB379 for details. JA 7. For JC, the “case temp” location is taken at the package top center. Electrical Specifications (ISL21080-09, V = 0.9V) OUT VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. MIN MAX PARAMETER SYMBOL CONDITIONS (Note13) TYP (Note13) UNIT Output Voltage VOUT 0.9 V VOUT Accuracy at TA = +25°C (Notes8, 9) VOA -0.7 +0.7 % Output Voltage Temperature Coefficient TC VOUT 50 ppm/°C (Note10) Input Voltage Range VIN 2.0 5.5 V Supply Current IIN 0.35 1.5 µA Line Regulation VOUT /VIN 2V ≤ VIN ≤ 5.5V 30 350 µV/V Load Regulation VOUT/IOUT Sourcing: 0mA ≤ IOUT ≤ 10mA 6 100 µV/mA Sinking: -10mA ≤ IOUT≤ 0mA 23 350 µV/mA Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 30 mA Turn-On Settling Time tR VOUT = ±0.1% with no load 1 ms Ripple Rejection f = 120Hz -40 dB Output Voltage Noise eN 0.1Hz ≤ f ≤10Hz 40 µVP-P Broadband Voltage Noise VN 10Hz ≤ f ≤1kHz 10 µVRMS Noise Density f = 1kHz 1.1 µV/Hz Thermal Hysteresis (Note11) VOUT/TA TA = +125°C 100 ppm Long Term Stability (Note12) VOUT/t TA = +25°C 60 ppm FN6934 Rev.7.00 Page 3 of 23 Sep 28, 2018

ISL21080 Electrical Specifications (ISL21080-10, V = 1.024V) OUT VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. MIN MAX PARAMETER SYMBOL CONDITIONS (Note13) TYP (Note13) UNIT Output Voltage VOUT 1.024 V VOUT Accuracy at TA = +25°C (Notes8, 9) VOA -0.7 +0.7 % Output Voltage Temperature Coefficient TC VOUT 50 ppm/°C (Note10) Input Voltage Range VIN 2.7 5.5 V Supply Current IIN 0.31 1.5 µA Line Regulation VOUT /VIN 2.7V ≤ VIN ≤ 5.5V 80 350 µV/V Load Regulation VOUT/IOUT Sourcing: 0mA ≤ IOUT ≤ 7mA 25 100 µV/mA Sinking: -7mA ≤ IOUT≤ 0mA 50 350 µV/mA Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA Turn-On Settling Time tR VOUT = ±0.1% with no load 4 ms Ripple Rejection f = 120Hz -40 dB Output Voltage Noise eN 0.1Hz ≤ f ≤10Hz 30 µVP-P Broadband Voltage Noise VN 10Hz ≤ f ≤1kHz 52 µVRMS Noise Density f = 1kHz 2.2 µV/Hz Thermal Hysteresis (Note11) VOUT/TA TA = +165°C 100 ppm Long Term Stability (Note12) VOUT/t TA = +25°C 50 ppm Electrical Specifications (ISL21080-12, V = 1.25V) OUT VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. MIN MAX PARAMETER SYMBOL CONDITIONS (Note13) TYP (Note13) UNIT Output Voltage VOUT 1.25 V VOUT Accuracy at TA = +25°C (Notes8, 9) VOA -0.6 +0.6 % Output Voltage Temperature Coefficient TC VOUT 50 ppm/°C (Note10) Input Voltage Range VIN 2.7 5.5 V Supply Current IIN 0.31 1.5 µA Line Regulation VOUT /VIN 2.7V ≤ VIN ≤ 5.5V 80 350 µV/V Load Regulation VOUT/IOUT Sourcing: 0mA ≤ IOUT ≤ 7mA 25 100 µV/mA Sinking: -7mA ≤ IOUT≤ 0mA 50 350 µV/mA Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA Turn-On Settling Time tR VOUT = ±0.1% with no load 4 ms Ripple Rejection f = 120Hz -40 dB Output Voltage Noise eN 0.1Hz ≤ f ≤10Hz 30 µVP-P Broadband Voltage Noise VN 10Hz ≤ f ≤1kHz 52 µVRMS Noise Density f = 1kHz 1.1 µV/Hz Thermal Hysteresis (Note11) VOUT/TA TA = +165°C 100 ppm Long Term Stability (Note12) VOUT/t TA = +25°C 50 ppm FN6934 Rev.7.00 Page 4 of 23 Sep 28, 2018

ISL21080 Electrical Specifications (ISL21080-15, V = 1.5V) OUT VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. MIN MAX PARAMETER SYMBOL CONDITIONS (Note13) TYP (Note13) UNIT Output Voltage VOUT 1.5 V VOUT Accuracy at TA = +25°C (Notes8, 9) VOA -0.5 +0.5 % Output Voltage Temperature Coefficient TC VOUT 50 ppm/°C (Note10) Input Voltage Range VIN 2.7 5.5 V Supply Current IIN 0.31 1.5 µA Line Regulation VOUT /VIN 2.7V ≤ VIN ≤ 5.5V 80 350 µV/V Load Regulation VOUT/IOUT Sourcing: 0mA ≤ IOUT ≤ 7mA 10 100 µV/mA Sinking: -7mA ≤ IOUT≤ 0mA 50 350 µV/mA Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA Turn-On Settling Time tR VOUT = ±0.1% with no load 4 ms Ripple Rejection f = 120Hz -40 dB Output Voltage Noise eN 0.1Hz ≤ f ≤10Hz 30 µVP-P Broadband Voltage Noise VN 10Hz ≤ f ≤1kHz 52 µVRMS Noise Density f = 1kHz 1.1 µV/Hz Thermal Hysteresis (Note11) VOUT/TA TA = +165°C 100 ppm Long Term Stability (Note12) VOUT/t TA = +25°C 50 ppm dElectrical Specifications (ISL21080-20, V = 2.048V) OUT VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise specified.Boldface limits apply over the operating temperature range, -40°C to +85°C. MIN MAX PARAMETER SYMBOL CONDITIONS (Note13) TYP (Note13) UNIT Output Voltage VOUT 2.048 V VOUT Accuracy at TA = +25°C (Notes8, 9) VOA -0.3 +0.3 % Output Voltage Temperature Coefficient TC VOUT 50 ppm/°C (Note10) Input Voltage Range VIN 2.7 5.5 V Supply Current IIN 0.31 1.5 µA Line Regulation VOUT /VIN 2.7V ≤ VIN ≤ 5.5V 80 350 µV/V Load Regulation VOUT/IOUT Sourcing: 0mA ≤ IOUT ≤ 7mA 25 100 µV/mA Sinking: -7mA ≤ IOUT≤ 0mA 50 350 µV/mA Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA Turn-On Settling Time tR VOUT = ±0.1% with no load 4 ms Ripple Rejection f = 120Hz -40 dB Output Voltage Noise eN 0.1Hz ≤ f ≤10Hz 30 µVP-P Broadband Voltage Noise VN 10Hz ≤ f ≤1kHz 52 µVRMS Noise Density f = 1kHz 1.1 µV/Hz Thermal Hysteresis (Note11) VOUT/TA TA = +165°C 100 ppm Long Term Stability (Note12) VOUT/t TA = +25°C 50 ppm FN6934 Rev.7.00 Page 5 of 23 Sep 28, 2018

ISL21080 Electrical Specifications (ISL21080-25, V = 2.5V) OUT VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise specified.Boldface limits apply over the operating temperature range, -40°C to +85°C. MIN MAX PARAMETER SYMBOL CONDITIONS (Note13) TYP (Note13) UNIT Output Voltage VOUT 2.5 V VOUT Accuracy at TA = +25°C (Notes8, 9) VOA -0.3 +0.3 % Output Voltage Temperature Coefficient TC VOUT 50 ppm/°C (Note10) Input Voltage Range VIN 2.7 5.5 V Supply Current IIN 0.31 1.5 µA Line Regulation VOUT /VIN 2.7V ≤ VIN ≤ 5.5V 80 350 µV/V Load Regulation VOUT/IOUT Sourcing: 0mA ≤ IOUT ≤ 7mA 25 100 µV/mA Sinking: -7mA ≤ IOUT≤ 0mA 50 350 µV/mA Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA Turn-On Settling Time tR VOUT = ±0.1% with no load 4 ms Ripple Rejection f = 120Hz -40 dB Output Voltage Noise eN 0.1Hz ≤ f ≤10Hz 30 µVP-P Broadband Voltage Noise VN 10Hz ≤ f ≤1kHz 52 µVRMS Noise Density f = 1kHz 1.1 µV/Hz Thermal Hysteresis (Note11) VOUT/TA TA = +165°C 100 ppm Long Term Stability (Note12) VOUT/t TA = +25°C 50 ppm Electrical Specifications (ISL21080-30, V = 3.0V) OUT VIN = 5.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. MIN MAX PARAMETER SYMBOL CONDITIONS (Note13) TYP (Note13) UNIT Output Voltage VOUT 3.0 V VOUT Accuracy at TA = +25°C (Notes8, 9) VOA -0.2 +0.2 % Output Voltage Temperature Coefficient TC VOUT 50 ppm/°C (Note10) Input Voltage Range VIN 3.2 5.5 V Supply Current IIN 0.31 1.5 µA Line Regulation VOUT /VIN 3.2V ≤ VIN ≤ 5.5V 80 350 µV/V Load Regulation VOUT/IOUT Sourcing: 0mA ≤ IOUT ≤ 7mA 25 100 µV/mA Sinking: -7mA ≤ IOUT≤ 0mA 50 350 µV/mA Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA Turn-On Settling Time tR VOUT = ±0.1% with no load 4 ms Ripple Rejection f = 120Hz -40 dB Output Voltage Noise eN 0.1Hz ≤ f ≤10Hz 30 µVP-P Broadband Voltage Noise VN 10Hz ≤ f ≤1kHz 52 µVRMS Noise Density f = 1kHz 1.1 µV/Hz Thermal Hysteresis (Note 11) VOUT/TA TA = +165°C 100 ppm Long Term Stability (Note 12) VOUT/t TA = +25°C 50 ppm FN6934 Rev.7.00 Page 6 of 23 Sep 28, 2018

ISL21080 Electrical Specifications (ISL21080-33, V = 3.3V) OUT VIN = 5.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. MIN MAX PARAMETER SYMBOL CONDITIONS (Note13) TYP (Note13) UNIT Output Voltage VOUT 3.3 V VOUT Accuracy at TA = +25°C (Notes8, 9) VOA -0.2 +0.2 % Output Voltage Temperature Coefficient TC VOUT 50 ppm/°C (Note10) Input Voltage Range VIN 3.5 5.5 V Supply Current IIN 0.31 1.5 µA Line Regulation VOUT /VIN 3.5 V ≤ VIN ≤ 5.5V 80 350 µV/V Load Regulation VOUT/IOUT Sourcing: 0mA ≤ IOUT ≤ 10mA 25 100 µV/mA Sinking: -10mA ≤ IOUT≤ 0mA 50 350 µV/mA Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA Turn-On Settling Time tR VOUT = ±0.1% with no load 4 ms Ripple Rejection f = 120Hz -40 dB Output Voltage Noise eN 0.1Hz ≤ f ≤10Hz 30 µVP-P Broadband Voltage Noise VN 10Hz ≤ f ≤1kHz 52 µVRMS Noise Density f = 1kHz 1.1 µV/Hz Thermal Hysteresis (Note11) VOUT/TA TA = +165°C 100 ppm Long Term Stability (Note12) VOUT/t TA = +25°C 50 ppm Electrical Specifications (ISL21080-41 V = 4.096V) OUT VIN = 5.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. MIN MAX PARAMETER SYMBOL CONDITIONS (Note13) TYP (Note13) UNIT Output Voltage VOUT 4.096 V VOUT Accuracy at TA = +25°C (Notes8, 9) VOA -0.2 +0.2 % Output Voltage Temperature Coefficient TC VOUT 50 ppm/°C (Note10) Input Voltage Range VIN 4.5 8.0 V Supply Current IIN 0.5 1.5 µA Line Regulation VOUT /VIN 4.5 V ≤ VIN ≤ 8.0V 80 350 µV/V Load Regulation VOUT/IOUT Sourcing: 0mA ≤ IOUT ≤ 10mA 10 100 µV/mA Sinking: -10mA ≤ IOUT≤ 0mA 20 350 µV/mA Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 80 mA Turn-On Settling Time tR VOUT = ±0.1% with no load 4 ms Ripple Rejection f = 120Hz -40 dB Output Voltage Noise eN 0.1Hz ≤ f ≤10Hz 30 µVP-P Broadband Voltage Noise VN 10Hz ≤ f ≤1kHz 52 µVRMS Noise Density f = 1kHz 1.1 µV/Hz Thermal Hysteresis (Note11) VOUT/TA TA = +165°C 100 ppm Long Term Stability (Note12) VOUT/t TA = +25°C 50 ppm FN6934 Rev.7.00 Page 7 of 23 Sep 28, 2018

ISL21080 Electrical Specifications (ISL21080-50 V = 5.0V) OUT VIN = 6.5V, TA = -40°C to +85°C, IOUT = 0, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. MIN MAX PARAMETER SYMBOL CONDITIONS (Note13) TYP (Note13) UNIT Output Voltage VOUT 5.0 V VOUT Accuracy at TA = +25°C (Notes8, 9) VOA -0.2 +0.2 % Output Voltage Temperature Coefficient TC VOUT 50 ppm/°C (Note10) Input Voltage Range VIN 5.5 8.0 V Supply Current IIN 0.5 1.5 µA Line Regulation VOUT /VIN 5.5 V ≤ VIN ≤ 8.0V 80 350 µV/V Load Regulation VOUT/IOUT Sourcing: 0mA ≤ IOUT ≤ 10mA 10 100 µV/mA Sinking: -10mA ≤ IOUT≤ 0mA 20 350 µV/mA Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 80 mA Turn-On Settling Time tR VOUT = ±0.1% with no load 4 ms Ripple Rejection f = 120Hz -40 dB Output Voltage Noise eN 0.1Hz ≤ f ≤10Hz 30 µVP-P Broadband Voltage Noise VN 10Hz ≤ f ≤1kHz 52 µVRMS Noise Density f = 1kHz 1.1 µV/Hz Thermal Hysteresis (Note11) VOUT/TA TA = +165°C 100 ppm Long Term Stability (Note12) VOUT/t TA = +25°C 50 ppm NOTES: 8. Post-reflow drift for the ISL21080 devices ranges from 100µV to 1.0mV based on experimental results with devices on FR4 double sided boards. The design engineer must take this into account when considering the reference voltage after assembly. 9. Post-assembly X-ray inspection may also lead to permanent changes in device output voltage and should be minimized or avoided. Initial accuracy can change 10mV or more under extreme radiation. Most inspection equipment does not affect the FGA reference voltage, but if X-ray inspection is required, it is advisable to monitor the reference output voltage to verify excessive shift has not occurred. 10. Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change in VOUT is divided by the temperature range; in this case, -40°C to +85°C = +125°C. 11. Thermal Hysteresis is the change of VOUT measured at TA = +25°C after temperature cycling over a specified range, TA. VOUT is read initially at TA=+25°C for the device under test. The device is temperature cycled and a second VOUT measurement is taken at +25°C. The difference between the initial VOUT reading and the second VOUT reading is then expressed in ppm. For  TA = +125°C, the device under test is cycled from +25°C to +85°C to -40°C to +25°C. 12. Long term drift is logarithmic in nature and diminishes over time. Drift after the first 1000 hours is approximately 10ppm/1khrs. 13. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. FN6934 Rev.7.00 Page 8 of 23 Sep 28, 2018

ISL21080 Typical Performance Characteristics Curves V = 0.9V OUT VIN = 3.0V, IOUT = 0mA, TA = +25°C unless otherwise specified. 0.6 0.6 0.5 0.5 HIGH +85°C 0.4 0.4 A) 0.3 A) 0.3 µ µ I (IN 0.2 LOW TYP I (IN 0.2 -40°C +25°C 0.1 0.1 0 0 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 VIN (V) VIN (V) FIGURE 2. IIN vs VIN, THREE UNITS FIGURE 3. IIN vs VIN OVER-TEMPERATURE 0.90020 200 0.90015 150 O O T LOW T V (V) NORMALIZED OUT0.9V AT V = 3.0VIN 000000......888999999000999000899001505050 HIGH TYP V (µV) NORMALIZED OUT V = 3.0VIN-11-005500000 -40°C +85+°2C5°C 0.89980 -150 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 VIN (V) VIN (V) FIGURE 4. LINE REGULATION, THREE UNITS FIGURE 5. LINE REGULATION OVER-TEMPERATURE 0.9010 200 150 C LOW 5° 0.9005 100 V) O +2 TYP mV) 50 VIN = +0.3V V (OUT LIZED T 0.9000 HIGH V (OUT 0 MA  -50 VIN = -0.3V R O 0.8995 -100 N -150 0.8990 -200 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 TEMPERATURE (°C) TIME (µs) FIGURE 6. VOUT vs TEMPERATURE NORMALIZED to +25°C FIGURE 7. LINE TRANSIENT RESPONSE, WITH CAPACITIVE LOAD FN6934 Rev.7.00 Page 9 of 23 Sep 28, 2018

ISL21080 Typical Performance Characteristics Curves V = 0.9V OUT VIN = 3.0V, IOUT = 0mA, TA = +25°C unless otherwise specified. (Continued) 200 500 VIN = +0.3V 150 +85°C 100 V) 50 V) m µ (UT 0 (UT 0 -40°C O O V -50 VIN = -0.3V V -100 -150 +25°C -200 -500 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -10-9-8-7-6-5-4-3-2 -1 0 1 2 3 4 5 6 7 8 910 TIME (µs) SINKING LOAD (mA) SOURCING FIGURE 8. LINE TRANSIENT RESPONSE FIGURE 9. LOAD REGULATION OVER-TEMPERATURE 1000 500 800 400 ILOAD = +7mA 600 300 ILOAD = +50µA 400 200 mV) 200 mV) 100 (T 0 (T 0 U U VO -200 VO -100   -400 -200 ILOAD = -50µA -600 -300 -800 ILOAD = -7mA -400 -1000 -500 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 TIME (ms) TIME (ms) FIGURE 10. LOAD TRANSIENT RESPONSE FIGURE 11. LOAD TRANSIENT RESPONSE 1.6 3.5 1.4 NO LOAD 7mA 3.0 1.2 2.5 1.0 LOW V) V) 2.0 VDD TYP HIGH (T 0.8 (T OU OU 1.5 V 0.6 V 1.0 0.4 0.2 0.5 0 0 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 0 0.3 0.6 0.9 1.2 1.5 VIN (V) TIME (ms) FIGURE 12. DROPOUT FIGURE 13. TURN-ON TIME FN6934 Rev.7.00 Page 10 of 23 Sep 28, 2018

ISL21080 Typical Performance Characteristics Curves V = 1.5V OUT VIN = 3.0V, IOUT = 0mA, TA = +25°C unless otherwise specified. 500 500 UNIT 1 400 400 +85°C UNIT 2 300 300 A) UNIT 3 A) -40°C +25°C n n (N (N I 200 I 200 100 100 0 0 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 VIN (V) VIN (V) FIGURE 14. IIN vs VIN, THREE UNITS FIGURE 15. IIN vs VIN OVER-TEMPERATURE 1.50020 150 V) 125 3 1.50015 = N V) 100 (V)UTO 1.5V AT VI 111...555000000010500 UNITU 2NIT 1 (µV) UTD TO V = 3IN 2570505 +25°C +85°C VOED T 1.49995 VOLIZE -25 LIZ MA -50 MAI 1.49990 UNIT 3 OR -75 OR 1.49985 (N -100 -40°C (N -125 1.49980 -150 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 VIN (V) VIN (V) FIGURE 16. LINE REGULATION, THREE UNITS FIGURE 17. LINE REGULATION OVER-TEMPERATURE 1.5005 1.5004 C = 500pF L 1.5003 1.5002 UNIT 2 VIN= 0.3V V) 1.5001 (OUT 1.5000 UNIT 1 V/DIV V 1.4999 m UNIT 3 0 1.4998 5 V = -0.3V IN 1.4997 1.4996 1.4995 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 VIN (V) 1ms/DIV FIGURE 18. VOUT vs TEMPERATURE NORMALIZED to +25°C FIGURE 19. LINE TRANSIENT RESPONSE, WITH CAPACITIVE LOAD FN6934 Rev.7.00 Page 11 of 23 Sep 28, 2018

ISL21080 Typical Performance Characteristics Curves V = 1.5V OUT VIN = 3.0V, IOUT = 0mA, TA = +25°C unless otherwise specified. (Continued) 900 C = 0pF L 700 V = 0.3V IN 500 +25°C V) V µ 300 DI (T V/ U m O 50 V 1000 -40°C -100 V = -0.3V IN +85°C -300 -500 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 1ms/DIV SINKING OUTPUT CURRENT SOURCING FIGURE 20. LINE TRANSIENT RESPONSE FIGURE 21. LOAD REGULATION OVER-TEMPERATURE DIV IL= 7mA DIV IL= 50A V/ V/ m m 0 0 0 0 5 1 I = -50A I = -7mA L L 2ms/DIV 1ms/DIV FIGURE 22. LOAD TRANSIENT RESPONSE FIGURE 23. LOAD TRANSIENT RESPONSE 1.52 3.5 NO LOAD 1.50 3.0 1.48 2.5 VIN 7mA LOAD V) V) 1.46 E ( 2.0 UNIT 1 V (OUT 1.44 OLTAG 1.5 V 1.42 1.0 UNIT 3 1.40 0.5 UNIT 2 1.38 0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VIN (V) TIME (ms) FIGURE 24. DROPOUT FIGURE 25. TURN-ON TIME FN6934 Rev.7.00 Page 12 of 23 Sep 28, 2018

ISL21080 Typical Performance Characteristics Curves V = 1.5V OUT VIN = 3.0V, IOUT = 0mA, TA = +25°C unless otherwise specified. (Continued) 200 0 NO LOAD NO LOAD 180 -10 1nF 160 1nF 140 -20 Ω) 120 B) -30 (UT 100 10nF R (d ZO 80 SR -40 10nF P 60 -50 40 100nF 20 -60 100nF 0 -70 10 100 1k 10k 100k 1M 10 100 1k 10k 100k 1M FREQUENCY (Hz) FREQUENCY(Hz) FIGURE 26. ZOUT vs FREQUENCY, IOUT = 2mA FIGURE 27. PSRR vs FREQUENCY Typical Performance Characteristics Curves TA = +25°C unless otherwise specified. 1.6 1.6 NO LOAD 7mA 1.4 1.4 1.2 1.2 1.0 1.0 V) V) (T 0.8 (T 0.8 NO LOAD 7mA U U O O V 0.6 V 0.6 0.4 0.4 0.2 0.2 0 0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 VIN (V) VIN (V) FIGURE 28. DROPOUT, ISL21080-10 FIGURE 29. DROPOUT, ISL21080-12 3.0 3.3 2.9 3.2 2.8 NO LOAD 7mA NO LOAD 7mA 2.7 3.1 V) 2.6 V) (UT 2.5 (UT 3.0 VO 2.4 VO 2.9 2.3 2.2 2.8 2.1 2.0 2.7 2.5 2.7 2.9 3.1 3.3 3.5 3.0 3.2 3.4 3.6 3.8 4.0 VIN (V) VIN (V) FIGURE 30. DROPOUT, ISL21080-25 FIGURE 31. DROPOUT, ISL21080-30 FN6934 Rev.7.00 Page 13 of 23 Sep 28, 2018

ISL21080 Typical Performance Characteristics Curves TA = +25°C unless otherwise specified. (Continued) 3.6 4.3 NO LOAD 7mA 3.5 4.2 NO LOAD 7mA 3.4 4.1 V) V) (UT 3.3 (UT 4.0 O O V V 3.2 3.9 3.1 3.8 3.0 3.7 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.1 4.3 4.5 4.7 4.9 5.1 VIN (V) VIN (V) FIGURE 32. DROPOUT, ISL21080-33 FIGURE 33. DROPOUT, ISL21080-41 5.3 NO LOAD 7mA 5.2 5.1 V) (T 5.0 U O V 4.9 4.8 4.7 5.0 5.2 5.4 5.6 5.8 6.0 VIN (V) FIGURE 34. DROPOUT, ISL21080-50 High Current Application 1.502 1.502 VIN = 5V VIN = 5V 1.500 1.500 (V)F 1.498 VIN = 3.5V (V)F 1.498 VIN = 3.5V E E R R V 1.496 V 1.496 VIN = 3.3V VIN = 3.3V 1.494 1.494 1.492 1.492 0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35 ILOAD (mA) ILOAD (mA) FIGURE 35. DIFFERENT VIN AT ROOM TEMPERATURE FIGURE 36. DIFFERENT VIN AT HIGH TEMPERATURE (+85°C) FN6934 Rev.7.00 Page 14 of 23 Sep 28, 2018

ISL21080 Applications Information Because these machines vary in X-ray dose delivered, it is difficult to produce an accurate maximum pass FGA Technology recommendation. The ISL21080 series of voltage references use floating gate Nanopower Operation technology to create references with very low drift and supply Reference devices achieve their highest accuracy when powered current. Essentially, the charge stored on a floating gate cell is up continuously, and after initial stabilization has taken place. set precisely in manufacturing. The reference voltage output This drift can be eliminated by leaving the power on continuously. itself is a buffered version of the floating gate voltage. The resulting reference device has excellent characteristics which are The ISL21080 is the first high precision voltage reference with unique in the industry: very low temperature drift, high initial ultra low power consumption that makes it possible to leave accuracy, and almost zero supply current. The reference voltage power on continuously in battery operated circuits. The ISL21080 itself is not limited by voltage bandgaps or Zener settings, so a consumes extremely low supply current due to the proprietary wide range of reference voltages can be programmed (standard FGA technology. Supply current at room temperature is typically voltage settings are provided, but customer-specific voltages are 350nA, which is 1 to 2 orders of magnitude lower than available). competitive devices. Application circuits using battery power benefit greatly from having an accurate, stable reference, which The process used for these reference devices is a floating gate essentially presents no load to the battery. CMOS process, and the amplifier circuitry uses CMOS transistors for amplifier and output transistor circuitry. While providing In particular, battery powered data converter circuits that would excellent accuracy, there are limitations in output noise level and normally require the entire circuit to be disabled when not in use load regulation due to the MOS device characteristics. These can remain powered up between conversions as shown in limitations are addressed with circuit techniques discussed in Figure37. Data acquisition circuits providing 12bits to 24 bits of other sections. accuracy can operate with the reference device continuously biased with no power penalty, providing the highest accuracy and Board Assembly Considerations lowest possible long term drift. FGA references provide high accuracy and low temperature drift but some PCB assembly precautions are necessary. Normal VIN = +3.0V 10µF 0.01µF Output voltage shifts of 100µV to 1mV can be expected with Pb-free reflow profiles or wave solder on multi-layer FR4 PC boards. Avoid excessive heat or extended exposure to high reflow VIN VOUT or wave solder temperatures. This may reduce device initial ISL21080 accuracy. GND 0.001µF TO 0.01µF Post-assembly X-ray inspection may also lead to permanent changes in device output voltage and should be minimized or REF IN avoided. If X-ray inspection is required, it is advisable to monitor ENABLE SERIAL the reference output voltage to verify excessive shift has not SCK BUS occurred. If large amounts of shift are observed, it is best to add an SDAT X-ray shield consisting of thin zinc (300µm) sheeting to allow clear 12 TO 24-BIT imaging, yet block X-ray energy that affects the FGA reference. A/D CONVERTER Special Applications Considerations FIGURE 37. REFERENCE INPUT FOR ADC CONVERTER In addition to post-assembly examination, other X-ray sources may affect the FGA reference long term accuracy. Airport Other reference devices consuming higher supply currents need screening machines contain X-rays and has a cumulative effect to be disabled in between conversions to conserve battery on the voltage reference output accuracy. Carry-on luggage capacity. Absolute accuracy suffers as the device is biased and screening uses low level X-rays and is not a major source of requires time to settle to its final value, or, may not actually settle output voltage shift; however, if a product is expected to pass to a final value as power on time may be short. Table1 shows an through that type of screening over 100 times, it may need to example of battery life in years for ISL21080 in various power on consider shielding with copper or aluminum. Checked luggage conditions with 1.5µA maximum current consumption. X-rays are higher intensity and can cause output voltage shift in much fewer passes, thus devices expected to go through those TABLE 1. EXAMPLE OF BATTERY LIFE IN YEARS FOR ISL21080 IN machines should definitely consider shielding. Note that just two VARIOUS POWER ON CONDITIONS WITH 1.5µA MAX layers of 1/2 ounce copper planes reduce the received dose by CURRENT over 90%. The leadframe for the device which is on the bottom BATTERY RATING 50% DUTY 10% DUTY also provides similar shielding. (mAH) CONTINUOUS CYCLE CYCLE If a device is expected to pass through luggage X-ray machines 40 3 6 30* numerous times, it is advised to mount a 2-layer (minimum) PCB 225 16.3* 32.6* 163* on the top, and along with a ground plane underneath will effectively shield it from 50 to 100 passes through the machine. NOTE: *Typical Li-ion battery has a shelf life of up to 10 years. FN6934 Rev.7.00 Page 15 of 23 Sep 28, 2018

ISL21080 ISL21080 Used as a Low Cost Precision 100000 Current Source Using an N-JET and an ISL21080 Nanopower voltage reference, a 10000 precision, low cost, high impedance current source can be created. The precision of the current source is largely dependent Ω) ( on the tempco and accuracy of the reference. The current setting UT 1000 O resistor contributes less than 20% of the error. Z F = 10Hz 100 F = 60Hz +8V TO 28V ISET =VOUT FF == 110000H0Hzz RSET 10 IL = ISET + IRSET 10 100 1000 10000 ILOAD(μA) FIGURE 40. ZOUT VS LOAD (SOURCING AND SINKING) CURRENT, NO VIN LOAD CAPACITANCE VOUT RSET 0.01µF ISL21080-1.5 10kΩ ZOUT > 100MΩ 0.1% VOUT = 1.5V 10ppm/°C 1000 GND ISY ~ 0.31µA 100 ISET IL AT 0.1% ACCURACY (Ω) ~150.3µA UT 10 O Z FIGURE 38. ISL21080 USED AS A LOW COST PRECISION CURRENT SOURCE F = 10Hz 1 F = 60Hz Output Impedance vs Load Current F = 100Hz F = 1000Hz The normal operation of the ISL21080 is to “source current” at a 0.1 specific reference voltage. This part is not suitable for 10 100 1000 10000 applications resulting in the output having to simultaneously ILOAD(μA) source and sink load currents, as it is a nano-powered part. This FIGURE 41. ZOUT VS LOAD (SOURCING) CURRENT, NO LOAD can occur if the voltage reference is used in a bi-directional filter CAPACITANCE resulting in output currents having to both source and sink. In an event where such currents are applied, at every zero crossing, the part becomes unstable and generates voltage spikes as shown in 10000 Figure39 (blue trace). The output impedance due to these F = 10Hz voltage spikes is much larger (Figure40) than if the voltage F = 60Hz reference is only sourcing (Figure41) or only sinking (Figure42). 1000 F = 100Hz Notice in Figure41 and Figure42, there is a direct correlation F = 1000Hz between the output impedance vs load current. Ω) 100 ( T U O ISL21080 1.5V Z 10 VIN = 3.3V 500mV/DIV 1 RS = 50k 0.1 VOUT 20mV/DIV 10 100 1000 10000 ILOAD(μA) FIGURE 42. ZOUT VS LOAD (SINKING) CURRENT, NO LOAD CAPACITANCE 40ms/DIV FIGURE 39. OUTPUT VOLTAGE SPIKES CAUSED BY SOURCING AND SINKING OUTPUT LOAD CURRENTS AT ZERO CROSSING FN6934 Rev.7.00 Page 16 of 23 Sep 28, 2018

ISL21080 Board Mounting Considerations Turn-On Time For applications requiring the highest accuracy, board mounting The ISL21080 devices have ultra-low supply current and thus, the location should be reviewed. Placing the device in areas subject to time to bias-up internal circuitry to final values is longer than with slight twisting can reduce the accuracy of the reference voltage due higher power references. Normal turn-on time is typically 4ms. to die stresses. It is normally best to place the device near the edge Because devices can vary in supply current down to >300nA, of a board, or the shortest side, as the axis of bending is most turn-on time can last up to about 12ms. Care should be taken in limited at that location. Obviously, mounting the device on flexprint system design to include this delay before measurements or or extremely thin PC material will likewise cause loss of reference conversions are started. accuracy. Temperature Coefficient Noise Performance and Reduction The limits stated for temperature coefficient (tempco) are governed The output noise voltage in a 0.1Hz to 10Hz bandwidth is by the method of measurement. The overwhelming standard for typically 30µVP-P. Noise in the 10kHz to 1MHz bandwidth is specifying the temperature drift of a reference is to measure the approximately 400µVP-P with no capacitance on the output, as reference voltage at two temperatures, take the total variation, shown in Figure43. These noise measurements are made with a (VHIGH - VLOW), and divide by the temperature extremes of 2 decade bandpass filter made of a 1-pole high-pass filter with a measurement (THIGH–TLOW). The result is divided by the nominal corner frequency at 1/10 of the center frequency and 1-pole reference voltage (at T = +25°C) and multiplied by 106 to yield low-pass filter with a corner frequency at 10 times the center ppm/°C. This is the “Box” method for specifying temperature frequency. Figure43 also shows the noise in the 10kHz to 1MHz coefficient. band can be reduced to about 50µVP-P using a 0.001µF capacitor on the output. Noise in the 1kHz to 100kHz band can be further reduced using a 0.1µF capacitor on the output, but noise in the 1Hz to 100Hz band increases due to instability of the very low power amplifier with a 0.1µF capacitance load. For load capacitances above 0.001µF, the noise reduction network shown in Figure44 is recommended. This network reduces noise significantly over the full bandwidth. As shown in Figure43, noise is reduced to less than 40µVP-P from 1Hz to 1MHz using this network with a 0.01µF capacitor and a 2kΩ resistor in series with a 10µF capacitor. 400 CL = 0 350 CL = 0.001µF CL = 0.1µF )P 300 CL = 0.01µF AND 10µF + 2kΩ P- V E (µ 250 G TA 200 L O E V 150 S OI N 100 50 0 1 10 100 1k 10k 100k FIGURE 43. NOISE REDUCTION VIN = 3.0V 10µF VIN VO 0.1µF ISL21080 GND 2kΩ 0.01µF 10µF FIGURE 44. NOISE REDUCTION NETWORK FN6934 Rev.7.00 Page 17 of 23 Sep 28, 2018

ISL21080 Typical Application Circuits VIN = 3.0V R = 200Ω 2N2905 VIN ISL21080 VOUT 2.5V/50mA 0.001µF GND FIGURE 45. PRECISION 2.5V 50mA REFERENCE 2.7V TO 5.5V 0.1µF 10µF VIN VOUT ISL21080 GND 0.001µF VCC RH VOUT X9119 SDA + 2-WIRE BUS SCL VOUT – (BUFFERED) VSS RL FIGURE 46. 2.5V FULL SCALE LOW-DRIFT 10-BIT ADJUSTABLE VOLTAGE SOURCE 2.7V TO 5.5V 0.1µF 10µF VIN VOUT + VOUT SENSE – ISL21080 LOAD GND FIGURE 47. KELVIN SENSED LOAD FN6934 Rev.7.00 Page 18 of 23 Sep 28, 2018

ISL21080 Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please visit our website to make sure you have the latest revision. DATE REVISION CHANGE Sep 28, 2018 FN6934.7 Added evaluation board part numbers to Ordering Information table. Updated Figure26, “ZOUT vs FREQUENCY, IOUT = 2mA,” on page13 (the lower frequency responses were changed for Output impedance with Iout = 2mA). Updated Figure 27 (minor grid lines were added). Added “Output Impedance vs Load Current” on page16. Mar 26, 2018 FN6934.6 Updated Related Literature section. Updated Ordering Information table by adding -T7A part, tape and reel quantity column, and updating package drawing number. Updated Note 5 by fixing the induced error caused from importing new formatting. Changed 70mA to 70µA. Removed About Intersil section. Replaced POD P3.064 with POD P3.064A. Jun 23, 2014 FN6934.5 Converted to New Template Updated POD with following changes: In Detail A, changed lead width dimension from 0.13+/-0.05 to 0.085-0.19 Changed dimension of foot of lead from 0.31+/-0.10 to 0.38+/-0.10 In Land Pattern, added 0.4 Rad Typ dimension In Side View, changed height of package from 0.91+/-0.03 to 0.95+/-0.07 May, 12, 2010 FN6934.4 Changed Theta JA in the “Thermal Information” on page3 from 170 to 275. Added Theta JC and applicable note. FN6934 Rev.7.00 Page 19 of 23 Sep 28, 2018

ISL21080 Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please visit our website to make sure you have the latest revision. (Continued) DATE REVISION CHANGE Apr 29, 2010 FN6934.3 Incorrect Thermal information, needs to be re-evaluated and added at a later date when the final data is available. Removed Theta JC and applicable note from “Thermal Information” on page3. Apr 14, 2010 Corrected y axis label on Figure 9 from “VOUT (V)” to “VOUT (µV)” Apr 6, 2010 Source/sink for 0.9V option changed from 7mA to 10mA Line regulation condition for 0.9V changed from 2.7V to 2V Line regulation typical for 0.9V option changed from 10 to 30µV/V TA in Thermal Hysterisis conditions of 0.9V option changed from 165°C to 125°C Moved “Board Assembly Considerations” and “Special Applications Considerations” to page15. Deleted “Handling and Board Mounting” section since “Board Assembly Considerations” on page15 contains same discussion. Added “Special Note: Post-assembly X-ray inspection may lead to permanent changes in device output voltage and should be minimized or avoided.” to “ISL21080” on page1 Figures 2 and 3 revised to show line regulation and Iin down to 2V. Figures 4 and 5 revised to show Vin down to 2V. Added “Initial accuracy can change 10mV or more under extreme radiation.” to Note 9 on page8. Apr 1, 2010 1. page3: Change Vin Min from 2.7 to 2.0 2. page3: Change Iin Typ from 0.31 to 0.35 3. page3: Change Line Reg Typ from 80 to 10 4. page3: Change Load Reg Condition from 7mA to 10mA and -7mA to -10mA 5. page3: Change Load Reg Typ for Source from 25 to 6 and Sink from 50 to 23. 6. page3: Change Isc Typ from 50 to 30 7. page3: Change tR from 4 to 1 8. Change Ripple Rejection typ for all options from -30 to -40 9. page3: Change eN typ from 30 to 40V 10. page3: Change VN typ from 50 to 10V 11. page3: Change Noise Density typ from 1.1 to 2.2 12. page3: Change Long Term Stability from 50 to 60 13. Added Figure 2 to 13 on page9 to page10 for 0.9V curves. 14. Added Figure 28 to 34 on page13 to page14 for other options Dropout curve. 15. page1: Change Input Voltage Range for 0.9V option from TBD to 2V to 5.5V 16. Added latch up to “Absolute Maximum Ratings” on page3 17. Added Junction Temperature to “Thermal Information” on page3 18. Added JEDEC standards used at the time of testing for “ESD Ratings” on page3 19. HBM in “Absolute Maximum Ratings” on page3 changed from 5.5kV to 5kV 20. Added Theta JC and applicable note. Mar 25, 2010 Throughout- Converted to new format. Changes made as follows: Moved “Pin Configuration” and “Pin Descriptions” to page2 Added “Related Literature” to page1 Added key selling feature graphic Figure 1 to page1 Added "Boldface limits apply..." note to common conditions of Electrical Specifications tables on page3 through page8. Bolded applicable specs. Added Note 13 to MIN MAX columns of all Electrical Specifications tables. Added ““Environmental Operating Conditions” to page3 and added Note 5 Added “The process used for these reference devices is a floating gate CMOS process, and the amplifier circuitry uses CMOS transistors for amplifier and output transistor circuitry. While providing excellent accuracy, there are limitations in output noise level and load regulation due to the MOS device characteristics. These limitations are addressed with circuit techniques discussed in other sections.” on page15 FN6934 Rev.7.00 Page 20 of 23 Sep 28, 2018

ISL21080 Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please visit our website to make sure you have the latest revision. (Continued) DATE REVISION CHANGE Oct 14, 2009 FN6934.2 1. Removed “Coming Soon” on page 1 and 2 for -10, -20, -41, and -50 options. 2. Page 1. Moved “ISL21080-505.5V to 8.0V" from bullet to sub-bullet. 3. Update package outline drawing P3.064 to most recent revision. Updates to package were to add land pattern and move dimensions from table onto drawing (no change to package dimensions) Sep 04, 2009 FN6934.1 Converted to new Intersil template. Added Revision History and Products Information. Updated Ordering Information to match Intrepid, numbered all notes and added Moisture Sensitivity Note with links. Moved Pin Descriptions to page 1 to follow pinout Changed in Features Section From: Reference Output Voltage1.25V, 1.5V, 2.500V, 3.300V To: Reference Output Voltage 0.900V, 1.024V, 1.250V, 1.500V, 2.048V, 2.500V, 3.000V, 3.300V, 4.096V, 5.000V From: Initial Accuracy: 1.5V±0.5% To: Initial Accuracy: ISL21080-09 and -10±0.7% ISL21080-12 ±0.6% ISL21080-15±0.5% ISL21080-20 and -25±0.3% ISL21080-30, -33, -41, and -50±0.2% FROM: Input Voltage Range ISL21080-12 (Coming Soon)2.7V to 5.5V ISL21080-152.7V to 5.5V ISL21080-25 (Coming Soon)2.7V to 5.5V ISL21080-33 (Coming Soon)3.5V to 5.5V TO: Input Voltage Range: ISL21080-09, -10, -12, -15, -20, and -252.7V to 5.5V ISL21080-09, -10, and 20 (Coming Soon) ISL21080-303.2V to 5.5V ISL21080-333.5V to 5.5V ISL21080-41 (Coming Soon)4.5V to 8.0V Added: ISL21080-50 (Coming Soon)5.5V to 8.0V Output Voltage Noise 30µVP-P (0.1Hz to 10Hz) Updated Electrical Spec Tables by Tables with Voltage References 9, 10, 12, 20, 25, 30, 33 and 41. Added to Abs Max Ratings: VIN to GND (ISL21080-41 and 50 only-0.5V to +10V VOUT to GND (10s) (ISL21080-41 and 50 only-0.5V to +5.1V Changed Tja in Thermal information from “202.70” to “170” to match ASYD in Intrepid Added Note: Post-assembly X-ray inspection may also lead to permanent changes in device output voltage and should be minimized or avoided. Most inspection equipment will not affect the FGA reference voltage, but if X-ray inspection is required, it is advisable to monitor the reference output voltage to verify excessive shift has not occurred. Added Special Applications Considerations Section on page 12. Jul 28, 2009 FN6934.0 Initial Release. FN6934 Rev.7.00 Page 21 of 23 Sep 28, 2018

ISL21080 Package Outline Drawing P3.064A 3 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE (SOT23-3) Rev 0, 7/14 2.92 ±0.12 4 DETAIL "A" 0.13 ±0.05 CL 2.37 ±0.27 CL 1.30 ±0.10 4 0.950 0 to 8° 0.435 ±0.065 0.20M C TOP VIEW 10° TYP (2 plcs) 0.91 ±0.03 1.00 ±0.12 GAUGE PLANE SEATING PLANE C SEATING PLANE 0.10 C 0.31 ±0.10 5 0.013(MIN) 0.100(MAX) SIDE VIEW DETAIL "A" (0.60) NOTES: (2.15) 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to ASME Y14.5M-1994. (1.25) 3. Reference JEDEC TO-236. 4. Dimension does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25mm per side. 5. Footlength is measured at reference to gauge plane. (0.4 RAD typ) (0.95 typ.) TYPICAL RECOMMENDED LAND PATTERN FN6934 Rev.7.00 Page 22 of 23 Sep 28, 2018

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