LT6020/LT6020-1 Dual Micropower, 5V/µs Precision Rail-to-Rail Output Amplifier FeaTures DescripTion n Excellent Slew Rate to Power Ratio The LT®6020 is a low power, enhanced slew rate, precision n Slew Rate: 5V/μs operational amplifier. The proprietary circuit topology of n Maximum Supply Current: 100μA/Amplifier this amplifier gives excellent slew rate at low quiescent n Maximum Offset Voltage: 30μV power dissipation without compromising precision or n Maximum Offset Voltage Drift: 0.5μV/°C settling time. In addition, unique input stage circuitry n High Dynamic Input Impedance allows the input impedance to remain high during input n Fast Recovery from Shutdown voltage steps as large as 5V. The combination of preci- n Maximum Input Bias Current: 3nA sion specs along with fast settling makes this part ideal n No Output Phase Inversion for MUX applications. n Gain Bandwidth Product: 400kHz The low quiescent current of the LT6020 along with its n Wide Specified Supply Range: 3V to 30V ability to operate on supplies as low as 3V make it useful n Operating Temperature Range: –40°C to 125°C in portable systems. The LT6020-1 features a shutdown n DFN and MS8 Packages mode which reduces the typical supply current to 1.4μA. n Rail-to-Rail Outputs The LT6020 is available in the small 8-lead DFN and 8-lead applicaTions MSOP packages. The LT6020-1 is available in a 10-lead DFN package. n Precision Signal Processing n 18-Bit DAC Amplifier L, LT, LTC, LTM, Linear Technology, SmartMesh and the Linear logo are registered trademarks and SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the n Multiplexed ADC Applications property of their respective owners. Patent Pending. n Low Power Portable Systems n Low Power Wireless Sensor Networks Typical applicaTion 16-Bit DAC with ±10V Output Swing 20V Output Step Response LT1019-2.5 5V/DIV CS 3.8VDC TO 5.5VDC IN OUT 0.1µF GND 1µF 0.1µF VOUT 5V/DIV VDD LTC2642 REF RFB 10pF 15V INV – 20µs/DIV 60201 TA01b 1/2 LT6020 VOUT POWER-ON 16-BIT DAC VOUT + RESET –15V CS + 16-BIT DATA LATCH SCLK DIN COLNOTGRICOL 1/2 LT6020– L1T05kΩ40 M0-A1TCHED CLR 16-BIT SHIFT REGISTER RESISTOR NETWORK GND 60201 TA01a 60201fa 1 For more information www.linear.com/LT6020

LT6020/LT6020-1 absoluTe MaxiMuM raTings (Note 1) Total Supply Voltage (V+ to V–) .................................36V Operating and Specified Temperature Range Differential Input Voltage (within Supplies) ...............36V I-Grade.................................................–40°C to 85°C Input Voltage (DGND, EN) (Relative to V–) ................36V H-Grade .............................................–40°C to 125°C Input Current (+IN, –IN, DGND, EN) .....................±10mA Junction Temperature ...........................................150°C Output Short-Circuit Duration ..........................Indefinite Storage Temperature Range ..................–65°C to 150°C Lead Temperature (Soldering, 10 sec) ...................300°C pin conFiguraTion TOP VIEW TOP VIEW OUT A 1 8 V+ OUT A 1 10 V+ TOP VIEW –IN A 2 9 OUT B –IN A 2 7 OUT B A OUTA 1 8 V+ +IN A 3 A 9 B 6 –IN B +INV A– 43 11 B 78 –+IINN BB –+IINNAA 23 A 76 O–IUNTBB V– 4 5 +IN B DGND 5 6 EN V– 4 B 5 +INB MS8 PACKAGE DD PACKAGE DD PACKAGE 8-LEAD PLASTIC MSOP 8-LEAD (3mm × 3mm) PLASTIC DFN 10-LEAD (3mm × 3mm) PLASTIC DFN θJA = 163°C/W, θJC = 40°C/W θJA = 43°C/W, θJC = 5.5°C/W θJA = 43°C/W, θJC = 5.5°C/W EXPOSED PAD (PIN 9) IS CONNECTED TO V– (PIN 4) EXPOSED PAD (PIN 11) IS CONNECTED TO V– (PIN 4) (PCB CONNECTION OPTIONAL) (PCB CONNECTION OPTIONAL) orDer inForMaTion LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT6020IDD#PBF LT6020IDD#TRPBF LGMC 8-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C LT6020HDD#PBF LT6020HDD#TRPBF LGMC 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT6020IDD-1#PBF LT6020IDD-1#TRPBF LGKF 10-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C LT6020HDD-1#PBF LT6020HDD-1#TRPBF LGKF 10-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT6020IMS8#PBF LT6020IMS8#TRPBF LTGJG 8-Lead Plastic MSOP –40°C to 85°C LT6020HMS8#PBF LT6020HMS8#TRPBF LTGJG 8-Lead Plastic MSOP –40°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 60201fa 2 For more information www.linear.com/LT6020

LT6020/LT6020-1 elecTrical characTerisTics The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at T = 25°C, V = ±15V, V = V = Mid-Supply, V = 0V, V = 5V. DGND A S CM OUT DGND EN and EN specifications only apply to the LT6020-1. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Input Offset Voltage DD Packages 20 70 µV OS T = –40° to 85°C l 110 µV A T = –40° to 125°C l 120 µV A MS8 Package 5 30 µV T = –40° to 85°C l 70 µV A T = –40° to 125°C l 80 µV A ∆V Input Offset Voltage Drift (Note 2) DD Packages l –0.8 ±0.3 0.8 µV/°C OSI ∆Temp MS8 Package l –0.5 ±0.2 0.5 µV/°C ∆V Long Term Input Offset Voltage Stability l ±0.2 µV/Mo OSI ∆Time I Input Bias Current –3 ±0.1 3 nA B T = –40° to 85°C l –3 3 nA A T = –40° to 125°C l –10 10 nA A I Input Offset Current –1 ±0.1 1 nA OS T = –40° to 85°C l –1 1 nA A T = –40° to 125°C l –2 2 nA A Input Noise Voltage 0.1Hz to 10Hz 1.1 µV P-P e Input Noise Voltage Density f = 10Hz 50 nV/√Hz n f = 1kHz 46 nV/√Hz in Input Noise Current Density f = 1kHz 37 fA/√Hz C Input Capacitance Common Mode 1.5 pF IN Differential Mode 2.5 pF R Input Resistance Common Mode 17 GΩ IN Differential Mode 20 MΩ V Common Mode Input Range l V– + 1.2 V+ – 1.4 V ICM CMRR Common Mode Rejection Ratio V = –13.8V to 13.6V 120 132 dB CM l 120 dB PSRR Supply Rejection Ratio V = 3V to 30V 120 140 dB S l 118 dB A Large-Signal Voltage Gain R = 6.98kΩ, V = ±14V 110 116 dB VOL L OUT l 108 dB R = 100kΩ, V = ±14.5V 126 138 dB L OUT l 126 dB V Output Swing Low (V – V–) R = 10kΩ 130 200 mV OL OUT L T = –40° to 85°C l 250 mV A T = –40° to 125°C l 300 mV A V Output Swing High (V+ – V ) R = 10kΩ 100 140 mV OH OUT L T = –40° to 85°C l 165 mV A T = –40° to 125°C l 190 mV A I Short-Circuit Current V = 0V, Sourcing 8 mA SC OUT T = –40° to 85°C l 5.5 mA A T = –40° to 125°C l 5 mA A V = 0V, Sinking 11 mA OUT T = –40° to 85°C l 5.5 mA A T = –40° to 125°C l 5.5 mA A 60201fa 3 For more information www.linear.com/LT6020

LT6020/LT6020-1 elecTrical characTerisTics The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at T = 25°C, V = ±15V, V = V = Mid-Supply, V = 0V, V = 5V. DGND A S CM OUT DGND EN and EN specifications only apply to the LT6020-1. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS SR Slew Rate A = 1, 10V Step 3 5 V/μs VCL T = –40° to 85°C l 2.4 V/μs A T = –40° to 125°C l 2.4 V/μs A A = 1, 5V Step 1.4 2.4 V/μs VCL T = –40° to 85°C l 1.1 V/μs A T = –40° to 125°C l 1 V/μs A GBW Gain-Bandwidth Product f = 10kHz l 290 400 kHz O Minimum Supply Voltage Guaranteed by PSRR l 3 V I Supply Current per Amplifier 90 100 μA S T = –40° to 85°C l 125 μA A T = –40° to 125°C l 140 μA A Supply Current in Shutdown V = 0.8V 1.4 3 μA EN T = –40° to 85°C l 3.2 μA A T = –40° to 125°C l 3.6 μA A t Settling Time (A = 1) 0.1% 5V Output Step 6 μs s V 0.01% 5V Output Step 7.8 μs 0.0015% 5V Output Step 13.8 μs 0.0015% 10V Output Step 12.4 μs t Enable Time A = 1 100 µs ON V V DGND Pin Voltage Range l V– V+ – 3 V DGND I DGND Pin Current l –200 –400 nA DGND I EN Pin Current l –100 –200 nA EN V EN Pin Input Low Voltage Relative to DGND l 0.8 V ENL V EN Pin Input High Voltage Relative to DGND l 1.7 V ENH 60201fa 4 For more information www.linear.com/LT6020

LT6020/LT6020-1 elecTrical characTerisTics The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at T = 25°C, V = 3V, V = V = Mid-Supply, V = 0V, V = 3V. DGND and A S CM OUT DGND EN EN pin specifications only apply to the LT6020-1. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Input Offset Voltage DD Packages 20 100 µV OS T = –40° to 85°C l 140 µV A T = –40° to 125°C l 150 µV A MS8 Package 5 45 µV T = –40° to 85°C l 85 µV A T = –40° to 125°C l 95 µV A ∆V Input Offset Voltage Drift (Note 2) DD Packages l –0.8 ±0.3 0.8 µV/°C OSI ∆Temp MS8 Package l –0.5 ±0.2 0.5 µV/°C ∆V Long Term Input Offset Voltage Stability l ±0.2 µV/Mo OSI ∆Time I Input Bias Current ±1 nA B I Input Offset Current ±0.1 nA OS Input Noise Voltage 0.1Hz to 10Hz 1.1 µV P-P e Input Noise Voltage Density f = 10Hz 50 nV/√Hz n f = 1kHz 46 nV/√Hz in Input Noise Current Density f = 1kHz 37 fA/√Hz C Input Capacitance Common Mode 1.5 pF IN Differential Mode 2.5 pF R Input Resistance Common Mode 17 GΩ IN Differential Mode 20 MΩ V Common Mode Input Range l V– + 1.2 V+ – 1.4 V ICM CMRR Common Mode Rejection Ratio V = 1.2V to 1.6V 125 dB CM PSRR Supply Rejection Ratio V = 3V to 30V 120 140 dB S l 118 dB A Large-Signal Voltage Gain R = 6.98kΩ, V = 0.5V to 2.5V 98 108 dB VOL L OUT l 98 dB R = 100kΩ, V = 0.5V to 2.5V 136 dB L OUT V Output Swing Low (V – V–) R = 10kΩ 45 100 mV OL OUT L T = –40° to 85°C l 130 mV A T = –40° to 125°C l 150 mV A V Output Swing High (V+ – V ) R = 10kΩ 55 80 mV OH OUT L T = –40° to 85°C l 90 mV A T = –40° to 125°C l 100 mV A I Short-Circuit Current V = 1.5V, Sourcing 6 mA SC OUT T = –40° to 85°C l 3.5 mA A T = –40° to 125°C l 3.5 mA A V = 1.5V, Sinking 8 mA OUT T = –40° to 85°C l 5.5 mA A T = –40° to 125°C l 5.5 mA A SR Slew Rate (Note 3) A = –1, 2V Step 0.2 V/μs VCL GBW Gain-Bandwidth Product f = 10kHz 400 kHz O Minimum Supply Voltage Guaranteed by PSRR l 3 V 60201fa 5 For more information www.linear.com/LT6020

LT6020/LT6020-1 elecTrical characTerisTics The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at T = 25°C, V = 3V, V = V = Mid-Supply, V = 0V, V = 3V. DGND and A S CM OUT DGND EN EN pin specifications only apply to the LT6020-1. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS I Supply Current per Amplifier 85 95 μA S T = –40° to 85°C l 120 μA A T = –40° to 125°C l 135 μA A Supply Current in Shutdown V = 0.8V 0.9 1.1 μA EN T = –40° to 85°C l 1.5 μA A T = –40° to 125°C l 3 μA A t Settling Time (A = –1) 0.1% 2.4V Output Step 12.4 μs s V 0.01% 2.4V Output Step 21.2 μs 0.0015% 2.4V Output Step 39.2 μs t Enable Time A = 1 120 µs ON V V DGND Pin Voltage Range l V– V+ – 3 V DGND I DGND Pin Current –200 nA DGND I EN Pin Current –100 nA EN V EN Pin Input Low Voltage Relative to DGND l 0.8 V ENL V EN Pin Input High Voltage Relative to DGND l 1.7 V ENH Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: The slew rate of the LT6020 increases with the size of the may cause permanent damage to the device. Exposure to any Absolute input step. At lower supplies, the input step size is limited by the input Maximum Rating condition for extended periods may affect device common mode range. This trend can be seen in the Typical Performance reliability and lifetime. Characteristics. Note 2: Guaranteed by design. 60201fa 6 For more information www.linear.com/LT6020

LT6020/LT6020-1 Typical perForMance characTerisTics T = 25°C, V = ±15V, R = 100kΩ, unless A S L otherwise specified. Typical Distribution of Input Typical Distribution of Input Typical Distribution of Input Offset Voltage Offset Voltage Offset Voltage Drift 1400 4000 40 2932 PARTS 14930 PARTS 144 UNITS 1200 MS8 PACKAGE 3500 DD8 AND DD10 PACKAGES 35 DPADC8K AANGDE SDD10 3000 S 30 S1000 S EL T T N NI NI2500 N 25 R OF U 800 R OF U2000 OF CHA 20 BE 600 BE R NUM 400 NUM1500 UMBE 15 1000 N 10 200 500 5 0 0 0 –30 –20 –10 0 10 20 30 –70 –50 –30 –100 10 30 50 70 –0.80 –0.60 –0.40 –0.20 0 0.20 0.40 INPUT OFFSET VOLTAGE (µV) INPUT OFFSET VOLTAGE (µV) INPUT OFFSET VOLTAGE DRIFT (µV/°C) 60201 G31 60201 G32 60201 G33 Typical Distribution of Input Voltage Offset Shift vs Lead Free Offset Voltage IR Reflow 100 14 350 UNITS 40 PARTS 90 MS8 PACKAGE MS8 PACKAGE 12 80 S S EL 70 EL10 N N HAN 60 HAN 8 C C F 50 F O O ER 40 ER 6 B B M M U 30 U 4 N N 20 2 10 0 0 –0.50 –0.40 –0.30 –0.20 –0.10 0 0.10 –2 0 2 4 6 8 10 12 INPUT OFFSET VOLTAGE DRIFT (µV/°C) INPUT VOLTAGE OFFSET SHIFT (µV) 60201 G34 60201 G35 Offset Voltage vs Input Common Warm-Up Drift Offset Voltage vs Supply Voltage Mode Voltage 5 30 40 V) 4 µ 30 GE ( 3 20 ET VOLTA 21 GE (µV)10 GE (µV)2100 S A A OFF 0 OLT 0 OLT 0 N INPUT ––21 OFFSET V10 OFFSET V–10 E I –20 G–3 N –20 HA–4 –30 C –5 –30 –40 1 2 3 4 5 6 7 0 4 8 12 16 20 24 28 32 36 –15 –10 –5 0 5 10 15 TIME (ms) TOTAL SUPPLY VOLTAGE (V) INPUT COMMON MODE VOLTAGE (V) 60201 G01 60201 G02 60201 G03 60201fa 7 For more information www.linear.com/LT6020

LT6020/LT6020-1 Typical perForMance characTerisTics T = 25°C, V = ±15V, R = 100kΩ, unless A S L otherwise specified. Input Bias Current vs Input Bias Current vs Differential Temperature Input Voltage 0.1Hz to 10Hz Voltage Noise 4 1.00 0.75 3 A) A) 0.50 T (n T (µ IB– IB+ REN 2 REN 0.25 R R CU CU 0 500nV/DIV S S BIA 1 BIA–0.25 T T U U NP NP–0.50 I 0 I –0.75 –1 –1.00 –50 –25 0 25 50 75 100 125 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 1s/DIV TEMPERATURE (°C) DIFFERENTIAL INPUT VOLTAGE (V) 60201 G04 60201 G05 60201 G06 Voltage Noise Density vs Maximum Undistorted Output Large-Signal Transient Response Frequency Amplitude vs Frequency (5V Step) 1000 )P-P35 V E ( THD < 40dBc AV = 1 √Hz) LTAG 30 Y (nV/ UT VO 25 DENSIT 100 D OUTP 20 1V/DIV OISE ORTE 15 N T GE DIS 10 A N VOLT UM U 5 M XI 10 A 0 0.01 0.1 1 10 100 1k 10k M 0.1 1 10 10µs/DIV 60201 G09 FREQUENCY (Hz) FREQUENCY (kHz) 60201 G07 60201 G08 Large-Signal Transient Response Slew Rate vs Temperature Slew Rate vs Temperature (10V Step) (5V Step) (10V Step) 5 7 AV = 1 6 RISING EDGE 4 RISING EDGE 5 s) s) µ µ E (V/ 3 E (V/ 4 FALLING EDGE 2V/DIV AT AT R R W 2 FALLING EDGE W 3 E E L L S S 2 1 1 0 0 10µs/DIV 60201 G10 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 60201 G11 60201 G12 60201fa 8 For more information www.linear.com/LT6020

LT6020/LT6020-1 Typical perForMance characTerisTics T = 25°C, V = ±15V, R = 100kΩ unless A S L otherwise specified. Slew Rate vs Input Step Small-Signal Transient Response Overshoot vs Capacitive Load 8 50 AV = 1 FALLING EDGE 300pF AV = 1 AV = 1 7 100pF 45 VS = ±1.5V 40 6 0pF ATE (V/µs) 54 RISING EDGE 5mV/DIV HOOT (%) 332505 VS = ±15V R S SLEW 3 2µs/DIV 60201 G14 OVER 2105 2 10 1 5 0 0 0 5 10 15 20 25 30 0 100200300 400500 600 700800 9001000 INPUT STEP SIZE (VP-P) CAPACITIVE LOAD (pF) 60201 G13 60201 G15 Open-Loop Gain and Phase PSRR vs Frequency CMRR vs Frequency vs Frequency 160 140 140 –45 R SUPPLY REJECTION RATIO (dB) 111420864000000 +PSRR –PSRR ON MODE REJECTION RATIO (dB) 112086400000 OPEN LOOP GAIN (dB)11208624000000 VSV =S 3=V 30V –––91103850OPEN LOOP PHASE (DEGREE E M S OW 20 OM 20 0 ) P C 0 0 –20 –225 0.01 0.1 1 10 100 1k 10k 100k 1M 0.1 1 10 100 1k 10k 100k 1M 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) 60201 G16 60201 G17 60201 G18 Gain vs Frequency Open Loop Gain vs Load Output Impedance vs Frequency 3 150 1000 CL = 330pF VOUT = ±14.5V AV = 1 140 0 130 100 GAIN (dB) ––36 ACLV == 1100pF N LOOP GAIN (dB)111210000 UT IMPEDANCE (Ω) 101 E 90 P P T O U –9 80 O 0.1 CL = 100pF 70 AV = –1 –12 60 0.01 10k 100k 1M 0.1 1 10 100 1000 10k 100k 1M 10M FREQUENCY (Hz) LOAD CURRENT (mA) FREQUENCY (Hz) 60201 G19 60201 G20 60201 G21 60201fa 9 For more information www.linear.com/LT6020

LT6020/LT6020-1 Typical perForMance characTerisTics T = 25°C, V = ±15V, R = 100kΩ unless A S L otherwise specified. Shutdown Supply Current vs Supply Current vs Supply Voltage Temperature Start-Up Response 160 3.0 MPLIFIER (µA)111420000 1822555°°CC°C CURRENT (µA) 22..50 5V/VD0EIVVN CURRENT/A 8600 –40°C WN SUPPLY 11..50 VS = 30V I(V+) SUPPLY 4200 SHUTDO 0.5 VS = 3V 200µA/DIV 0 0 0µA 0 5 10 15 20 25 30 –50 –25 0 25 50 75 100 125 20µs/DIV TOTAL SUPPLY VOLTAGE (V) TEMPERATURE (°C) 60201 G22 60201 G23 60201 G24 Output Saturation Voltage vs Output Saturation Voltage vs Enable/Disable Response Sink Current (Output Low) Source Current (Output High) 1 1 AV = 1 VIN = 5VP-P AT 50kHz GE (V) TA = 125°C GE (V) TA = 125°C 5V/VDEIVN OLTA TA = 85°C OLTA TA = 85°C 0V N V N V O O ATI ATI R 0.1 R 0.1 ATU TA = –40°C ATU TA = –40°C S S 5VV/ODUIVT 0V T LOW TA = 25°C T HIGH TA = 25°C U U P P T T U U O O 0.01 0.01 100µs/DIV 0.1 1 10 0.1 1 10 LOAD CURRENT (mA) LOAD CURRENT (mA) 60201 G24 60201 G26 60201 G27 Positive Output Overdrive Negative Output Overdrive Crosstalk vs Frequency Recovery Recovery –40 VDGND = 0V AV = –100 AV = –100 VEN = 5V INPUT –60 OUTPUT 200mV/DIV 5V/DIV B) K (d –80 0V L A T S OS–100 0V CR INPUT 200mV/DIV OUTPUT 5V/DIV –120 –140 100 1k 10k 100k 1M 100µs/DIV 100µs/DIV FREQUENCY (Hz) 60201 G28 60201 G29 60201 G30 60201fa 10 For more information www.linear.com/LT6020

LT6020/LT6020-1 pin FuncTions OUT: Amplifier Output. EN (LT6020-1 Only): Enable Input. This pin must be connected high, normally to V+, for the amplifiers to be –IN: Inverting Input of the Amplifier. functional. EN is active high with the threshold approxi- +IN: Noninverting Input of the Amplifier. mately two diodes above DGND. EN cannot be floated. V–: Negative Power Supply. A bypass capacitor should be The shutdown threshold voltage is specified with respect to the voltage on the DGND pin. used between supply pins and ground. Additional bypass capacitance may be used between the power supply pins. V+: Positive Power Supply. A bypass capacitor should be used between supply pins and ground. Additional bypass DGND (LT6020-1 Only): Reference for EN Pin. It is normally tied to ground. DGND must be in the range from V– to V+ capacitance may be used between the power supply pins. –3V. If grounded, V+ must be ≥ 3V. The EN pin threshold is specified with respect to the DGND pin. DGND cannot be floated. siMpliFieD scheMaTic V+ LT6020-1 ONLY LOAD 5k CLASS AB 200k +IN DRIVE OUT EN 5k –IN 200k DGND V– 60201 BD applicaTions inForMaTion Preserving Low Power Operation The choice of feedback resistor values impacts several op-amp parameters as noted in the feedback compo- The proprietary circuitry used in the LT6020 provides an nents section. It should also be noted that the output of excellent combination of low power, low offset and en- the amplifier must drive this network. For example, in a hanced slew rate. Normally an amplifier with higher supply gain of two with a total feedback resistance of 10kΩ and current would be required to achieve this combination of an output voltage of 14V, the amplifier’s output will need slew rate and precision. Special care must be taken to to supply 1.4mA of current. This current will ultimately ensure that the low power operation is preserved. come from a supply. 60201fa 11 For more information www.linear.com/LT6020

LT6020/LT6020-1 applicaTions inForMaTion The supply current of the LT6020 increases with large smaller inputs the LT6020 slew rate approaches the slew differential input voltages. Normally, this does not impact rate more common in traditional micropower amplifiers. the low power nature of the LT6020 because the ampli- fier is forcing the two inputs to be at the same potential. Input Bias Current Conditions which cause differential input voltage to appear The design of the input stage of the LT6020 is more so- should be avoided in order to preserve the low power dis- phisticated than that shown in the Simplified Schematic. sipation of the LT6020. This includes but is not limited It uses both NPN and PNP input differential amplifiers to to: operation as a comparator, excessive loading on the sense the input differential voltage. As a result the speci- output and overdriving the input. fied input bias current can flow in or out of the input pins. Enhanced Slew Rate Multiplexer Applications/High Dynamic Input The LT6020 uses a proprietary input stage which provides Impedance an enhanced slew rate without sacrificing input precision The LT6020 has features which make it desirable for specs such as input offset voltage, common mode rejection multiplexer applications, such as the application featured and noise. The unique input stage of the LT6020 allows the on the back page of this data sheet. When the channels of output to quickly slew to its final value when large signal the multiplexer are cycled, the output of the multiplexer input steps are applied. This enhanced slew characteristic can produce large voltage transitions. Normally, bipolar allows the LT6020 to quickly settle the output to 0.0015% amplifiers have back-to-back diodes between the inputs, independent of input step size as shown in Figure 1. Typi- which will turn on when the input transient voltage exceeds cal micropower amplifiers cannot process large amplitude 0.7V, causing a large transient current to be conducted signals with this speed. As shown in the Typical Perfor- from the amplifier output stage back into the input driving mance curves, when the LT6020 is configured in unity circuitry. The driving circuitry then needs to absorb this gain and a 10V step is applied to the input the output will current and settle before the amplifier can settle. The slew at 5V/µs. In this same configuration, a 5V input step LT6020 uses 5.5V Zener diodes to protect its inputs which will slew the output at 2.4V/µs. Furthermore, a 0.7V input dramatically increases its input impedance with input steps step will lower the slew rate to 0.2V/µs. Note that for these as large as 5V. 30 Achieving Rail-to-Rail Operation without AV = 1 Rail-to-Rail Inputs 25 The LT6020 output is able to swing close to each power E (µs)20 supply rail, but the input stage is limited to operating M G TI15 between V– + 1.2V and V+ – 1.4V. For many inverting LIN 0.0015% applications and noninverting gain applications, this is T SET10 largely inconsequential. Figure 2 shows the basic op amp 0.01% configurations, what happens to the op amp inputs and 5 whether or not the op amp must have rail-to-rail inputs. 0 5 10 15 20 25 The circuit of Figure 3 shows an extreme example of the OUTPUT STEP (VP-P) inverting case. The input voltage at the 100k resistor can 60201 F01 Figure 1. Settling Time Is Essentially Flat swing ±13.5V and the LT6020 will output an inverted, 60201fa 12 For more information www.linear.com/LT6020

LT6020/LT6020-1 applicaTions inForMaTion VREF + VIN + VIN + RG VIN – – – RF RF 60201 F02 RG VREF INVERTING: AV = –RF/RG NONINVERTING: AV = 1 + RF/RG NONINVERTING: AV = 1 OP AMP INPUTS DO NOT MOVE, INPUTS MOVE BY AS MUCH AS INPUTS MOVE BY AS MUCH AS BUT ARE FIXED AT DC BIAS VIN, BUT THE OUTPUT MOVES OUTPUT POINT VREF MORE INPUT MUST BE RAIL-TO-RAIL INPUT DOES NOT HAVE TO BE INPUT MAY NOT HAVE TO BE FOR OVERALL CIRCUIT RAIL-TO-RAIL RAIL-TO-RAIL RAIL-TO-RAIL PERFORMANCE Figure 2. Some Op Amp Configurations Do Not Require Rail-to-Rail Inputs to Achieve Rail-to-Rail Outputs the specified input voltage range as shown in Figure 4. 1.5V ±1.35V ±13.5V SWINGS OUTPUT However the open loop gain is significantly reduced. While WELL OUTSIDE SWING SUPPLY RAILS the output roughly tracks the input, the reduction in open + loop gain degrades the accuracy of the LT6020 in this LT6020 region. Exceeding the input common mode range also VIN – 100k, 0.1% causes a significant increase in input bias current as shown in Figure 5. The output of the LT6020 is guaranteed over 10k, 0.1% the specified temperature range not to phase invert as long as the input voltage does not exceed the supply voltage. –1.5V 1880 F03 Figure 3. Extreme Inverting Case: Circuit Operates Properly Preserving Input Precision with Input Voltage Swing Well Outside Op Amp Supply Rails Preserving the input accuracy of the LT6020 requires divided-by-ten version of the input voltage. The output that the application circuit and PC board layout do not accuracy is limited by the resistors to 0.2%. Output referred, this error becomes 2.7mV. The 30µV input offset 20V voltage contribution, plus the additional error due to input AVSV ==± 115V INPUT bias current times the ~10k effective source impedance, +VCM LIMIT 10V OUTPUT contribute only negligibly to error. Phase Inversion 5V/DIV 0V The LT6020 input stage is limited to operating between V– + 1.2V and V+ – 1.4V. Exceeding this common mode range will –10V –VCM LIMIT cause the open loop gain to drop significantly. For a unity gain amplifier, the output roughly tracks the input well beyond –20V 200µs/DIV 60201 F04 Figure 4. No Phase Inversion 60201fa 13 For more information www.linear.com/LT6020

LT6020/LT6020-1 applicaTions inForMaTion 70 10pF 60 50 A) 100k µ T ( 40 N RE 30 R – CU 20 BIAS 10 100k CPAR LT6020 VOUT T + U 0 P IN–10 VIN 60201 F06 –20 Figure 6. Stability with Parasitic Input Capacitance –30 –15 –10 –5 0 5 10 15 Capacitive Loads INPUT COMMON MODE VOLTAGE (V) 60201 F05 The LT6020 can drive capacitive loads up to 100pF in Figure 5. Increased Ib Beyond VICM unity gain. The capacitive load driving capability increases as the amplifier is used in higher gain configurations. A introduce errors comparable to or greater than the offset small series resistance between the output and the load of the amplifiers. Temperature differentials across the will further increase the amount of capacitance that the input connections can generate thermocouple voltages of amplifier can drive. tens of microvolts so the connections of the input leads should be short, close together and away from heat dis- Shutdown Operation (LT6020-1) sipating components. Air currents across the board can also generate temperature differentials. The LT6020-1 shutdown function has been designed to be easily controlled from single supply logic or As is the case with all amplifiers, a change in load microcontollers. To enable the LT6020-1 when V = 0V DGND current changes the finite open loop gain. Increased load the enable pin must be driven above 1.7V. Conversely, to current reduces the open loop gain as seen in the Typical enter the low power shutdown mode the enable pin must Performance Characteristics section. This results in a be driven below 0.8V. In a ±15V dual supply application change in input offset voltage. Under large signal conditions where V = –15V, the enable pin must be driven above DGND with load currents of ±2mA the effective change in input ~ –13.3V to enable the LT6020-1. If the enable pin is error is just tens of microvolts. In precision applications it driven below –14.2V the LT6020-1 enters the low power is important to consider amplifier loading when selecting shutdown mode. Note that to enable the LT6020-1 the feedback resistor values as well as the loads on the device. enable pin voltage can range from –13.3V to 15V whereas to disable the LT6020-1 the enable pin can range from Feedback Components –15V to –14.2V. Figure 7 shows examples of enable pin Care must be taken to ensure that the pole formed by the control. While in shutdown, the outputs of the LT6020-1 feedback resistors and the parasitic capacitance at the are high impedance. inverting input does not degrade stability. For example, in The LT6020-1 is typically capable of coming out of a gain of +2 configuration, with 100k feedback resistors shutdown within 100µs. This is useful in power sensitive and a poorly designed circuit board layout with parasitic applications where duty cycled operation is employed capacitance of 10pF (amplifier + PC board) at the ampli- such as wireless mesh networks. In these applications the fier’s inverting input will cause the amplifier to have poor system is in low power mode the majority of the time, but phase margin due to a pole formed at 320kHz. An additional then needs to wake up quickly and settle for an acquisition capacitor of 10pF across the feedback resistor as shown before being powered back down to save power. in Figure 6 will eliminate any ringing or oscillation. 60201fa 14 For more information www.linear.com/LT6020

LT6020/LT6020-1 applicaTions inForMaTion ≥ –13.3V ≥ 1.7V ≥ 1.7V ≥ 1.7V ≥ 0.2V ON ON ON ON ON ≤ –14.2V ≤ 0.8V ≤ 0.8V ≤ 0.8V ≤ –0.7V +15 OFF +15 OFF +30 OFF +3V OFF +1.5 OFF + EN TO V+ OR + EN TO V+ OR + EN TO V+ OR + EN TO V+ OR + EN TO V+ OR EN LOGIC EN LOGIC EN LOGIC EN LOGIC EN LOGIC LT6020-1 LT6020-1 LT6020-1 LT6020-1 LT6020-1 – DGND – DGND – DGND – DGND – DGND –15 –15 –1.5 HIGH VOLTAGE HIGH VOLTAGE HIGH VOLTAGE LOW VOLTAGE LOW VOLTAGE SPLIT SUPPLIES SPLIT SUPPLIES SINGLE SUPPLY SINGLE SUPPLY SPLIT SUPPLIES 60201 F07 Figure 7. LT6020-1 Enable Pin Control Examples Typical applicaTions High Open-Loop Gain Composite Amplifier 4.7pF 10k 270pF D A O L 10k – VIN 1/2 LT6020 + + 1/2 LT6020 VOUT – 60201 F02a Parallel Amplifiers Achieves 32nV/√Hz Noise, Doubles Output Drive and Lowers Offset + VIN 1/2 LT6020 – 100Ω VOUT + 100Ω 1/2 LT6020 – 60201 F02b 60201fa 15 For more information www.linear.com/LT6020

LT6020/LT6020-1 package DescripTion Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698 Rev C) 0.70 ±0.05 3.5 ±0.05 1.65 ±0.05 2.10 ±0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 2.38 ±0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED R = 0.125 0.40 ±0.10 TYP 5 8 3.00 ±0.10 1.65 ±0.10 (4 SIDES) (2 SIDES) PIN 1 TOP MARK (NOTE 6) (DD8) DFN 0509 REV C 4 1 0.200 REF 0.75 ±0.05 0.25 ±0.05 0.50 BSC 2.38 ±0.10 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON TOP AND BOTTOM OF PACKAGE 60201fa 16 For more information www.linear.com/LT6020

LT6020/LT6020-1 package DescripTion Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. DD Package 10-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1699 Rev C) 0.70 ±0.05 3.55 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 2.38 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS R = 0.125 0.40 ±0.10 TYP 6 10 3.00 ±0.10 1.65 ±0.10 (4 SIDES) (2 SIDES) PIN 1 NOTCH PIN 1 R = 0.20 OR TOP MARK 0.35 × 45° (SEE NOTE 6) CHAMFER (DD) DFN REV C 0310 5 1 0.200 REF 0.75 ±0.05 0.25 ±0.05 0.50 BSC 2.38 ±0.10 (2 SIDES) 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 60201fa 17 For more information www.linear.com/LT6020

LT6020/LT6020-1 package DescripTion Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev G) 0.889 ±0.127 (.035 ±.005) 5.10 3.20 – 3.45 (.201) (.126 – .136) MIN 3.00 ±0.102 0.42 ± 0.038 0.65 (.118 ±.004) 0.52 (.0165 ±.0015) (.0256) (NOTE 3) 8 7 6 5 (.0205) TYP BSC REF RECOMMENDED SOLDER PAD LAYOUT 3.00 ±0.102 4.90 ±0.152 DETAIL “A” (.118 ±.004) 0.254 (.193 ±.006) (NOTE 4) (.010) 0° – 6° TYP GAUGE PLANE 1 2 3 4 0.53 ±0.152 (.021 ±.006) 1.10 0.86 (.043) (.034) DETAIL “A” MAX REF 0.18 (.007) SEATING PLANE 0.22 – 0.38 0.1016 ±0.0508 (.009 – .015) (.004 ±.002) TYP 0.65 MSOP (MS8) 0213 REV G (.0256) NOTE: BSC 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 60201fa 18 For more information www.linear.com/LT6020

LT6020/LT6020-1 revision hisTory REV DATE DESCRIPTION PAGE NUMBER A 04/14 Added MS8 package version. All 60201fa 19 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnecFtoiorn m ofo itrse c iirncfuoitrsm asa tdieosnc rwibwedw h.elirneiena wr.icllo nmot /iLnTfr6in0g2e0 on existing patent rights.

LT6020/LT6020-1 Typical applicaTion Gain of 11 Instrumentation Amplifier Improved Load Drive Capability R4, 100k R3, 10k R2, 10k R1, 100k V+ 2N3904 – – VIN + 1k 1/2 LT6020 1/2 LT6020 VOUT LT6020 VOUT VINM + + – D A VINP –3dB BW = 30kHz 2N3906 LO V– R1 TO R4: FOR HIGH DC CMRR USE LT5400-3 60201 F03a 60201 F03b ±13.6V Input Range MUX Buffer MUX Buffer Response, 12V Step 1/2 LTC203 15V IN1 5 V+ 0 IN2 15V VIN1 S1 D1 + –6V VIN2 S2 D2 1/2 LT6020 6V – GND V– 15V –15V 60201 TA03c relaTeD parTs PART NUMBER DESCRIPTION COMMENTS LTC6256 6.5MHz, 65µA RRIO Op Amp V : 350µV, GBW: 6.5MHz, SR: 1.8V/µs, e : 20nV/√Hz, I : 65µA OS n S LT1352 3MHz. 200V/µs Op Amp V : 600µV, GBW: 3MHz, SR: 200V/µs, e : 14nV/√Hz, I : 330µA OS n S LT1492 5MHz, 3V/µs Op Amp V : 180µV, GBW: 5MHz, SR: 3V/µs, e : 16.5nV/√Hz, I : 550µA OS n S LTC5800 SmartMesh® Wireless Sensor Network I Wireless Mesh Networks C LT5400 Quad Matched Resistor Network 0.01% Matching 60201fa 20 Linear Technology Corporation LT0414 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 For more information www.linear.com/LT6020 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LT6020  LINEAR TECHNOLOGY CORPORATION 2014

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: A nalog Devices Inc.: LT6020HMS8#PBF LT6020HDD#PBF LT6020IMS8#PBF LT6020IDD-1#PBF LT6020IMS8#TRPBF LT6020HDD- 1#PBF LT6020HDD#TRPBF LT6020IDD-1#TRPBF LT6020HMS8#TRPBF LT6020HDD-1#TRPBF LT6020IDD#PBF LT6020IDD#TRPBF