LTC2050/LTC2050HV Zero-Drift Operational Amplifiers in SOT-23 FEATURES DESCRIPTION n Maximum Offset Voltage of 3µV The LTC®2050 and LTC2050HV are zero-drift operational n Maximum Offset Voltage Drift of 30nV/°C amplifiers available in the 5- or 6-lead SOT-23 and SO-8 n Noise: 1.5µV (0.01Hz to 10Hz Typ) packages. The LTC2050 operates from a single 2.7V to P-P n Voltage Gain: 140dB (Typ) 6V supply. The LTC2050HV operates on supplies from n PSRR: 130dB (Typ) 2.7V to ±5.5V. The current consumption is 800µA and n CMRR: 130dB (Typ) the versions in the 6-lead SOT-23 and SO-8 packages n Supply Current: 0.8mA (Typ) offer power shutdown (active low). The LTC2050HVMP n Supply Operation offer operating range from 4.5V to ±5.5V and operating n LTC2050: 2.7V to 6V temperature range of – 55°C to 150°C. n LTC2050HV: 2.7V to ±5.5V The LTC2050, despite its miniature size, features uncom- n LTC2050HVMP: 4.5V to ±5.5V promising DC performance. The typical input offset volt- n Extended Common Mode Input Range age and offset drift are 0.5µV and 10nV/°C. The almost n Output Swings Rail-to-Rail zero DC offset and drift are supported with a power sup- n Input Overload Recovery Time: 2ms (Typ) ply rejection ratio (PSRR) and common mode rejection n Operating Temperature Range ratio (CMRR) of more than 130dB. n LTC2050: –40°C to 125°C n LTC2050HVMP: –55°C to 150°C The input common mode voltage ranges from the nega- n Low Profile (1mm) SOT-23 (ThinSOT™) Package tive supply up to typically 1V from the positive supply. The LTC2050 also has an enhanced output stage capable APPLICATIONS of driving loads as low as 2kΩ to both supply rails. The open-loop gain is typically 140dB. The LTC2050 also n Thermocouple Amplifiers features a 1.5µV DC to 10Hz noise and a 3MHz gain P-P n Electronic Scales bandwidth product. n Medical Instrumentation All registered trademarks and trademarks are the property of their respective owners. Protected n Strain Gauge Amplifiers by U.S. patents, including 5481178. n High Resolution Data Acquisition n DC Accurate RC Active Filters n Low Side Current Sense TYPICAL APPLICATION Differential Bridge Amplifier Input Referred Noise 0.1Hz to 10Hz 5V 5V 2 50Ω 0.1µF GAIN 0.1µF TRIM 1 18.2k V) 0 S3T5R0AΩIN 4 – 5 (µ GAUGE 1 LTC2050HV AV = 100 3 + –1 2 0.1µF 18.2k –2 0 2 4 6 8 10 2050 TA01a –5V TIME (SEC) 2050 TA01b Rev. E 1 Document Feedback For more information www.analog.com

LTC2050/LTC2050HV ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V+ to V–) Operating Temperature Range LTC2050 .................................................................7V LTC2050 ............................................–40°C to 125°C LTC2050HV...........................................................12V LTC2050HVMP ..................................–55°C to 150°C Input Voltage ........................(V+ + 0.3V) to (V– – 0.3V) Specified Temperature Range Output Short-Circuit Duration .........................Indefinite (Note 3) ..................................................–55°C to 150°C Storage Temperature Range ..................–65°C to 150°C Lead Temperature (Soldering, 10 sec) ...................300°C PIN CONFIGURATION TOP VIEW TOP VIEW TOP VIEW OUT 1 5 V+ SHDN 1 8 NC OUT 1 6 V+ V– 2 –IN 2 7 V+ V– 2 5 SHDN +IN 3 4 –IN +IN 3 6 OUT +IN 3 4 –IN S5 PACKAGE V– 4 5 NC 5-LEAD PLASTIC TSOT-23 S6 PACKAGE TJMAX = 150°C, θJA = 250°C/W 6-LEAD PLASTIC TSOT-23 S8 PACKAGE TJMAX = 150°C, θJA = 230°C/W 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 190°C/W ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC2050CS5#PBF LTC2050CS5#TRPBF LTAEG 5-Lead Plastic TSOT-23 0°C to 70°C LTC2050IS5#PBF LTC2050IS5#TRPBF LTAEG 5-Lead Plastic TSOT-23 –40°C to 85°C LTC2050HS5#PBF LTC2050HS5#TRPBF LTAEG 5-Lead Plastic TSOT-23 –40°C to 125°C LTC2050HVCS5#PBF LTC2050HVCS5#TRPBF LTAEH 5-Lead Plastic TSOT-23 0°C to 70°C LTC2050HVIS5#PBF LTC2050HVIS5#TRPBF LTAEH 5-Lead Plastic TSOT-23 –40°C to 85°C LTC2050HVHS5#PBF LTC2050HVHS5#TRPBF LTAEH 5-Lead Plastic TSOT-23 –40°C to 125°C LTC2050CS6#PBF LTC2050CS6#TRPBF LTAEJ 6-Lead Plastic TSOT-23 0°C to 70°C LTC2050IS6#PBF LTC2050IS6#TRPBF LTAEJ 6-Lead Plastic TSOT-23 –40°C to 85°C LTC2050HS6#PBF LTC2050HS6#TRPBF LTAEJ 6-Lead Plastic TSOT-23 –40°C to 125°C LTC2050HVMPS6#PBF LTC2050HVMPS6#TRPBF LTHGP 6-Lead Plastic TSOT-23 –55°C to 150°C LTC2050HVCS6#PBF LTC2050HVCS6#TRPBF LTAEK 6-Lead Plastic TSOT-23 0°C to 70°C LTC2050HVIS6#PBF LTC2050HVIS6#TRPBF LTAEK 6-Lead Plastic TSOT-23 –40°C to 85°C LTC2050HVHS6#PBF LTC2050HVHS6#TRPBF LTAEK 6-Lead Plastic TSOT-23 –40°C to 125°C LTC2050CS8#PBF LTC2050CS8#TRPBF 2050 8-Lead Plastic SO 0°C to 70°C LTC2050IS8#PBF LTC2050IS8#TRPBF 2050I 8-Lead Plastic SO –40°C to 85°C LTC2050HVCS8#PBF LTC2050HVCS8#TRPBF 2050HV 8-Lead Plastic SO 0°C to 70°C Rev. E 2 For more information www.analog.com

LTC2050/LTC2050HV ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC2050HVIS8#PBF LTC2050HVIS8#TRPBF 050HVI 8-Lead Plastic SO –40°C to 85°C LTC2050CS5 LTC2050CS5#TR LTAEG 5-Lead Plastic TSOT-23 0°C to 70°C LTC2050IS5 LTC2050IS5#TR LTAEG 5-Lead Plastic TSOT-23 –40°C to 85°C LTC2050HS5 LTC2050HS5#TR LTAEG 5-Lead Plastic TSOT-23 –40°C to 125°C LTC2050HVCS5 LTC2050HVCS5#TR LTAEH 5-Lead Plastic TSOT-23 0°C to 70°C LTC2050HVIS5 LTC2050HVIS5#TR LTAEH 5-Lead Plastic TSOT-23 –40°C to 85°C LTC2050HVHS5 LTC2050HVHS5#TR LTAEH 5-Lead Plastic TSOT-23 –40°C to 125°C LTC2050CS6 LTC2050CS6#TR LTAEJ 6-Lead Plastic TSOT-23 0°C to 70°C LTC2050IS6 LTC2050IS6#TR LTAEJ 6-Lead Plastic TSOT-23 –40°C to 85°C LTC2050HS6 LTC2050HS6#TR LTAEJ 6-Lead Plastic TSOT-23 –40°C to 125°C LTC2050HVCS6 LTC2050HVCS6#TR LTAEK 6-Lead Plastic TSOT-23 0°C to 70°C LTC2050HVIS6 LTC2050HVIS6#TR LTAEK 6-Lead Plastic TSOT-23 –40°C to 85°C LTC2050HVHS6 LTC2050HVHS6#TR LTAEK 6-Lead Plastic TSOT-23 –40°C to 125°C LTC2050CS8 LTC2050CS8#TR 2050 8-Lead Plastic SO 0°C to 70°C LTC2050IS8 LTC2050IS8#TR 2050I 8-Lead Plastic SO –40°C to 85°C LTC2050HVCS8 LTC2050HVCS8#TR 2050HV 8-Lead Plastic SO 0°C to 70°C LTC2050HVIS8 LTC2050HVIS8#TR 050HVI 8-Lead Plastic SO –40°C to 85°C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix. Rev. E 3 For more information www.analog.com

LTC2050/LTC2050HV ELECTRICAL CHARACTERISTICS (LTC2050/LTC2050HV) The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25°C. V = 3V unless otherwise noted. (Note 3) A S C, I SUFFIXES H SUFFIX PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Input Offset Voltage (Note 2) ±0.5 ±3 ±0.5 ±3 µV Average Input Offset Drift (Note 2) l ±0.03 ±0.05 µV/°C Long-Term Offset Drift 50 50 nV/√mo Input Bias Current LTC2050 ±20 ±75 ±20 ±75 pA l ±300 ±4000 pA LTC2050HV ±1 ±50 ±1 ±50 pA l ±100 ±4000 pA Input Offset Current LTC2050 ±150 ±150 pA l ±200 ±1000 pA LTC2050HV ±100 ±100 pA l ±150 ±1000 pA Input Noise Voltage R = 100Ω, 0.01Hz to 10Hz 1.5 1.5 µV S P-P Input Capacitance 1.7 1.7 pF Common Mode Rejection Ratio LTC2050/LTC2050HV V = GND to (V+ – 1.3) 115 130 115 130 dB CM V = GND to (V+ – 1.3) l 110 130 110 130 dB CM Power Supply Rejection Ratio V = 2.7V to 6V 120 130 120 130 dB S l 115 130 115 130 dB Large-Signal Voltage Gain R = 10k 120 140 120 140 dB L l 115 140 115 140 dB Output Voltage Swing High R = 2k to GND l 2.85 2.94 2.85 2.94 V L R = 10k to GND l 2.95 2.98 2.95 2.98 V L Output Voltage Swing Low R = 2k to GND l 1 10 1 10 mV L R = 10k to GND l 1 10 1 10 mV L Slew Rate 2 2 V/µs Gain Bandwidth Product 3 3 MHz Supply Current V = V , No Load l 0.75 1.1 0.75 1.2 mA SHDN IH V = V l 10 10 µA SHDN IL Shutdown Pin Input Low Voltage (V ) l V– + 0.5 V– + 0.5 V IL Shutdown Pin Input High Voltage (V ) l V+ – 0.5 V+ – 0.5 V IH Shutdown Pin Input Current V = GND l –0.5 –3 –0.5 –3 µA SHDN Internal Sampling Frequency 7.5 7.5 kHz Rev. E 4 For more information www.analog.com

LTC2050/LTC2050HV ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25°C. (LTC2050/LTC2050HV) V = 5V unless otherwise noted. (Note 3) A S C, I SUFFIXES H, MP SUFFIX PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Input Offset Voltage (Note 2) ±0.5 ±3 ±0.5 ±3 µV Average Input Offset Drift (Note 2) l ±0.03 ±0.05 µV/°C LTC2050HVMP l ±0.10 µV/°C Long-Term Offset Drift 50 50 nV/√mo Input Bias Current LTC2050 ±75 ±150 ±75 ±150 pA l ±300 ±4000 pA LTC2050HV ±7 ±50 ±7 ±50 pA l ±150 ±4000 pA LTC2050HVMP ±7 ±50 pA l ±8000 pA Input Offset Current LTC2050 ±300 ±300 pA l ±400 ±1000 pA LTC2050HV ±100 ±100 pA l ±200 ±1000 pA LTC2050HVMP l ±2000 pA Input Noise Voltage R = 100Ω, 0.01Hz to 10Hz 1.5 1.5 µV S P-P Common Mode Rejection Ratio LTC2050/LTC2050HV V = GND to (V+ – 1.3) 120 130 120 130 dB CM V = GND to (V+ – 1.3) l 115 130 110 130 dB CM LTC2050HVMP V = GND to (V+ – 1.3) l 107 130 dB CM Power Supply Rejection Ratio V = 2.7V to 6V 120 130 120 130 dB S l 115 130 115 130 dB LTC2050HVMP 117 130 dB V = 4.5V to 11V l 112 130 dB S Large-Signal Voltage Gain R = 10k 125 140 125 140 dB L l 120 140 115 140 dB Output Voltage Swing High R = 2k to GND l 4.85 4.94 4.85 4.94 V L R = 10k to GND l 4.95 4.98 4.95 4.98 V L Output Voltage Swing Low R = 2k to GND l 1 10 1 10 mV L R = 10k to GND l 1 10 1 10 mV L Slew Rate 2 2 V/µs Gain Bandwidth Product 3 3 MHz Supply Current V = V , No Load l 0.8 1.2 0.8 1.3 mA SHDN IH V = V l 15 15 µA SHDN IL Shutdown Pin Input Low Voltage (V ) l V– + 0.5 V– + 0.5 V IL Shutdown Pin Input High Voltage (V ) l V+ – 0.5 V+ – 0.5 V IH Shutdown Pin Input Current V = GND l –0.5 –7 –0.5 –7 µA SHDN Internal Sampling Frequency 7.5 7.5 kHz Rev. E 5 For more information www.analog.com

LTC2050/LTC2050HV ELECTRICAL CHARACTERISTICS (LTC2050HV) The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25°C. V = ±5V unless otherwise noted. (Note 3) A S C, I SUFFIXES H, MP SUFFIX PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Input Offset Voltage (Note 2) ±0.5 ±3 ±0.5 ±3 µV Average Input Offset Drift (Note 2) l ±0.03 ±0.05 µV/°C LTC2050HVMP l ±0.10 µV/°C Long-Term Offset Drift 50 50 nV/√mo Input Bias Current (Note 4) LTC2050HV ±25 ±125 ±25 ±125 pA l ±300 ±4000 pA LTC2050HVMP ±25 ±125 pA l ±8000 pA Input Offset Current (Note 4) LTC2050HV ±250 ±250 pA l ±500 ±1000 pA LTC2050HVMP l ±2000 pA Input Noise Voltage R = 100Ω, 0.01Hz to 10Hz 1.5 1.5 µV S P-P Common Mode Rejection Ratio LTC2050HV V = V– to (V+ – 1.3) 120 130 120 130 dB CM V = V– to (V+ – 1.3) l 115 130 115 130 dB CM LTC2050HVMP V = V– to (V+ – 1.3) l 112 130 dB CM Power Supply Rejection Ratio V = 2.7V to 11V 120 130 120 130 dB S l 115 130 115 130 dB LTC2050HVMP 117 130 dB V = 4.5 to 11V l 112 130 dB S Large-Signal Voltage Gain R = 10k 125 140 125 140 dB L l 120 140 120 140 dB Maximum Output Voltage Swing R = 2k to GND l ±4.75 ±4.94 ±4.50 ±4.94 V L R = 10k to GND l ±4.90 ±4.98 ±4.85 ±4.98 V L Slew Rate 2 2 V/µs Gain Bandwidth Product 3 3 MHz Supply Current V = V , No Load l 1 1.5 1 1.6 mA SHDN IH V = V l 25 25 µA SHDN IL Shutdown Pin Input Low Voltage (V ) l V– + 0.5 V– + 0.5 V IL Shutdown Pin Input High Voltage (V ) l V+ – 0.5 V+ – 0.5 V IH Shutdown Pin Input Current V = V– l –3 –20 –3 –20 µA SHDN Internal Sampling Frequency 7.5 7.5 kHz Note 1: Stresses beyond those listed under Absolute Maximum Ratings The LTC2050C/LTC2050HVC are guaranteed to meet the temperature may cause permanent damage to the device. Exposure to any Absolute limits of 0°C and 70°C. The LTC2050I/LTC2050HVI are guaranteed to meet Maximum Rating condition for extended periods may affect device the temperature limits of –40°C and 85°C. The LTC2050H/LTC2050HVH reliability and lifetime. are guaranteed to meet the temperature limits of –40°C and 125°C. The Note 2: These parameters are guaranteed by design. Thermocouple effects are guaranteed to meet the temperature limits of –55°C and 150°C. preclude measurements of these voltage levels during automated testing. Note 4: The bias current measurement accuracy depends on the proximity Note 3: All versions of the LTC2050 are designed, characterized and of the supply bypass capacitor to the device under test, especially at ±5V expected to meet the extended temperature limits of –40°C and 125°C. supplies. Because of testing limitations on the placement of this bypass capacitor, the bias current at ±5V supplies is guaranteed by design to meet the data sheet limits, but tested to relaxed limits. Rev. E 6 For more information www.analog.com

LTC2050/LTC2050HV TYPICAL PERFORMANCE CHARACTERISTICS Common Mode Rejection Ratio DC CMRR vs Common Mode vs Frequency Input Voltage PSRR vs Frequency 140 140 120 VS = 3V OR 5V 120 VCM = 0.5VP-P 120 100 –PSRR 100 100 80 R (dB) 80 R (dB) 80 VS = 3V VS = 5V R (dB) 60 +PSRR R R R M 60 M 60 S C C P 40 40 40 20 20 20 TA = 25°C 0 0 0 1 10 100 1k 10k 100k 0 1 2 3 4 5 10 100 1k 10k 100k 1M FREQUENCY (Hz) VCM (V) FREQUENCY (Hz) 2050 G01 2050 G02 2050 G03 Output Voltage Swing vs Output Swing vs Load Resistance Load Resistance Output Swing vs Output Current ±5V Supply 6 6 5 RL TO GND 4 RL TO GND 5 5 VS = 5V VS = 5V 3 NG (V) 4 AGE (V) 4 NG (V) 21 OUTPUT SWI 32 VS = 3V OUTPUT VOLT 23 VS = 3V OUTPUT SWI––012 –3 1 1 –4 0 0 –5 0 2 4 6 8 10 0.01 0.1 1 10 0 2 4 6 8 10 LOAD RESISTANCE (kΩ) OUTPUT CURRENT (mA) LOAD RESISTANCE (kΩ) 2050 G04 2050 G05 2050 G06 Output Swing vs Output Current Input Bias Current vs Temperature ±5V Supply Gain/Phase vs Frequency (LTC2050) 5 100 80 10k 4 RL TO GND 80 100 3 PHASE A) 1k OUTPUT SWING (V) ––21012 GAIN (dB)2460000 GAIN 111642000PHASE (DEG) UT BIAS CURRENT (p100 VVSS = = 5 3VV NP 10 –3 VS = 3V OR 5V 180 I –4 –20 CL = 35pF RL = 10kΩ –5 –40 200 1 0.01 0.1 1.0 10 100 1k 10k 100k 1M 10M –50 –25 0 25 50 75 100 125 OUTPUT CURRENT (mA) FREQUENCY (Hz) TEMPERATURE (°C) 2050 G07 2050 G08 2050 G09 Rev. E 7 For more information www.analog.com

LTC2050/LTC2050HV TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs Temperature Input Bias Current vs Temperature (LTC2050HVMP) (LTC2050HV) 10k 10k VVSS == 5±V5V VVSS == 35VV A) 1k A) 1k VS = ±5V p p T ( T ( N N E E R R R R CU100 CU100 S S A A BI BI T T U U NP 10 NP 10 I I 1 1 –50 –25 0 25 50 75 100 125 150 –50 –15 20 55 90 125 TEMPERATURE (°C) TEMPERATURE (°C) 2050 G10 2050 G11 Input Bias Current vs Input Input Bias Current vs Input Common Mode Voltage Common Mode Voltage (LTC2050HV) 160 60 A) E (p 140 50 D U 120 A) T MAGNIT 100 VS = 5V RRENT (p4300 VS = ±5V N 80 U E C RR AS 20 BIAS CU 6400 VS = 3V NPUT BI10 VS = 5V T I PU 20 0 VS = 3V N I 0 –10 0 1 2 3 4 5 –5 –3 –1 1 3 5 INPUT COMMON MODE VOLTAGE (V) INPUT COMMON MODE VOLTAGE (V) 2050 G12 2050 G13 Transient Response Input Overload Recovery 1.5 OUTPUT (V) 0.5/DIV 0 0 INPUT (V) –0.2 AV = 1 1µs/DIV 2050 G14 AV = –100 500µs/DIV 2050 G15 RL = 100k RL = 100k CL = 50pF CL = 10pF VS = 5V VS = ±1.5V Rev. E 8 For more information www.analog.com

LTC2050/LTC2050HV TYPICAL PERFORMANCE CHARACTERISTICS Sampling Frequency Sampling Frequency vs Supply Voltage vs Temperature 10 10 TA = 25°C Hz) 9 Hz) 9 UENCY (k 8 UENCY (k 8 VS = 5V Q Q RE RE G F 7 G F 7 N N MPLI MPLI SA 6 SA 6 5 5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 –50 –25 0 25 50 75 100 125 150 SUPPLY VOLTAGE (V) TEMPERATURE (°C) 2050 G16 2050 G17 Supply Current vs Supply Voltage Supply Current vs Temperature 1.2 1.1 TA = 25°C 1.0 1.0 UPPLY CURRENT (mA) 000...864 UPPLY CURRENT (mA)000...789 S S 0.2 0.6 VS = 3V VS = 5V VS = ±5V 0 0.5 2 4 6 8 10 –50–30–10 10 30 50 70 90 110130150 SUPPLY VOLTAGE (V) TEMPERATURE (°C) 2050 G18 2050 G19 Rev. E 9 For more information www.analog.com

LTC2050/LTC2050HV TEST CIRCUITS Electrical Characteristics Test Circuit 100k OUTPUT V+ 10Ω 4 – 5 1 LTC2050 3 + 2 RL V– 2050 TC01 DC−10Hz Noise Test Circuit 100k 475k 10Ω 4 – 0.01µF 158k 316k 475k 1 LTC2050 – 3 + 0.1µF 0.01µF LT1012 TO X-Y RECORDER + FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10. 2050 TC02 Rev. E 10 For more information www.analog.com

LTC2050/LTC2050HV APPLICATIONS INFORMATION Shutdown output multiplied by the closed loop gain of the op amp. To reduce this form of clock feedthrough, use smaller The LTC2050 includes a shutdown pin in the 6-lead valued gain setting resistors and minimize the source SOT-23 and the SO-8 version. When this active low pin resistance at the input. If the resistance seen at the inputs is high or allowed to float, the device operates normally. is less than 10k, this form of clock feedthrough is less When the shutdown pin is pulled low, the device enters than 1µV input referred at 7.5kHz, or less than the shutdown mode; supply current drops to 3µA, all clock- RMS amount of residue clock feedthrough from the first form ing stops, and both inputs and output assume a high described above. impedance state. Placing a capacitor across the feedback resistor reduces Clock Feedthrough, Input Bias Current either form of clock feedthrough by limiting the bandwidth of the closed loop gain. The LTC2050 uses auto-zeroing circuitry to achieve an almost zero DC offset over temperature, common mode Input bias current is defined as the DC current into the voltage, and power supply voltage. The frequency of the input pins of the op amp. The same current spikes that clock used for auto-zeroing is typically 7.5kHz. The term cause the second form of clock feedthrough described clock feedthrough is broadly used to indicate visibility of above, when averaged, dominate the DC input bias current this clock frequency in the op amp output spectrum. There of the op amp below 70°C. are typically two types of clock feedthrough in auto zeroed At temperatures above 70°C, the leakage of the ESD pro- op amps like the LTC2050. tection diodes on the inputs increases the input bias cur- The first form of clock feedthrough is caused by the settling rents of both inputs in the positive direction, while the of the internal sampling capacitor and is input referred; current caused by the charge injection stays relatively that is, it is multiplied by the closed loop gain of the op constant. At elevated temperatures (above 85°C) the amp. This form of clock feedthrough is independent of the leakage current begins to dominate and both the negative magnitude of the input source resistance or the magni- and positive pin’s input bias currents are in the positive tude of the gain setting resistors. The LTC2050 has a resi- direction (into the pins). due clock feedthrough of less then 1µV input referred RMS at 7.5kHz. Input Pins, ESD Sensitivity The second form of clock feedthrough is caused by the ESD voltages above 700V on the input pins of the op amp small amount of charge injection occurring during the will cause the input bias currents to increase (more DC sampling and holding of the op amp’s input offset volt- current into the pins). At these voltages, it is possible to age. The current spikes are multiplied by the impedance damage the device to a point where the input bias current seen at the input terminals of the op amp, appearing at the exceeds the maximums specified in this data sheet. Rev. E 11 For more information www.analog.com

LTC2050/LTC2050HV TYPICAL APPLICATIONS Single Supply Thermocouple Amplifier 1k 255k 1% 100Ω 1% 0.068µF 5V 5V 4 5 2 – LT1025A LTC2050 1 V10OmUTV/°C 7 3 K – + + 2 GND R– 0.1µF 4 5 TYPE K LT1025 COMPENSATES COLD JUNCTION OVER 0°C TO 100°C TEMPERATURE RANGE 2050 TA03 Gain of 1001 Single Supply Instrumentation Amplifier 0.1µF 10Ω V+ 10k 10k 4 – 5 V+ LTC2050 1 10Ω 4 – 5 3 1 –VIN + 2 LTC2050 VOUT 3 +VIN + 2 OUTPUT DC OFFSET ≤ 6mV FOR 0.1% RESISTORS, CMRR = 54dB 2050 TA04 Instrumentation Amplifier with 100V Common Mode Input Voltage 1k 1M V+ 1M 4 5 V+ + – VIN LTC2050HV 1 1k 4 – 5 – 1M 3 + 2 3 LTC2050HV 1 VOUT + 1k V– 2 V– OUTPUT OFFSET ≤3mV FOR 0.1% RESISTORS, CMRR = 54dB 2050 TA06 Rev. E 12 For more information www.analog.com

LTC2050/LTC2050HV TYPICAL APPLICATIONS High Precision 3-Input Mux 1.1k 10k SHDN SEL1 4 – 5 1 LTC2050 IN 1 3 + AV = 10 10Ω 10k OUT SHDN SEL2 4 – 5 1 LTC2050 IN 2 3 + AV = 1000 SHDN SEL3 4 – 5 1 LTC2050 IN 3 3 + AV = 1 2050 TA07 SELECT INPUTS ARE CMOS LOGIC COMPATIBLE Low Side Power Supply Current Sensing 5V 3 5 OUT + 3V/AMP 1 LOAD CURRENT LTC2050HV IN MEASURED 4 – CIRCUIT, REFERRED 2 TO –5V 10Ω 10k TO 3mΩ MEASURED CIRCUIT LOAD CURRENT 0.1µF –5V 2050 TA08 Rev. E 13 For more information www.analog.com

LTC2050/LTC2050HV PACKAGE DESCRIPTION S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635 Rev B) 0.62 0.95 2.90 BSC MAX REF (NOTE 4) 1.22 REF 1.50 – 1.75 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT 0.30 – 0.45 TYP 0.95 BSC PER IPC CALCULATOR 5 PLCS (NOTE 3) 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.20 1.90 BSC NOTE: (NOTE 3) S5 TSOT-23 0302 REV B 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 Rev. E 14 For more information www.analog.com

LTC2050/LTC2050HV PACKAGE DESCRIPTION S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 2.90 BSC 0.62 0.95 (NOTE 4) MAX REF 1.22 REF 1.50 – 1.75 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT 0.30 – 0.45 0.95 BSC PER IPC CALCULATOR 6 PLCS (NOTE 3) 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 1.90 BSC 0.09 – 0.20 (NOTE 3) S6 TSOT-23 0302 NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 Rev. E 15 For more information www.analog.com

LTC2050/LTC2050HV PACKAGE DESCRIPTION S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610 Rev G) .189 – .197 .045 ±.005 (4.801 – 5.004) .050 BSC NOTE 3 8 7 6 5 .245 MIN .160 ±.005 .150 – .157 .228 – .244 (3.810 – 3.988) (5.791 – 6.197) NOTE 3 .030 ±.005 TYP 1 2 3 4 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° .053 – .069 (0.254 – 0.508) (1.346 – 1.752) .004 – .010 .008 – .010 (0.203 – 0.254) 0°– 8° TYP (0.101 – 0.254) .016 – .050 .014 – .019 .050 (0.406 – 1.270) (0.355 – 0.483) (1.270) NOTE: INCHES TYP BSC 1. DIMENSIONS IN (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) SO8 REV G 0212 4. PIN 1 CAN BE BEVEL EDGE OR A DIMPLE Rev. E 16 For more information www.analog.com

LTC2050/LTC2050HV REVISION HISTORY (Revision history begins at Rev D) REV DATE DESCRIPTION PAGE NUMBER D 08/17 Updated T 2 JMAX E 11/18 Added MP option (higher temperature version) 1, 2, 4-6, 7-8 Rev. E Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog 17 Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license Fiso gr rmanoterde biny fiomrpmlicaattiioonn owr wotwhe.arwniasleo ugn.cdeorm any patent or patent rights of Analog Devices.

LTC2050/LTC2050HV TYPICAL APPLICATION Ground Referred Precision Current Sources LT1034 0 ≤ IOUT ≤ 4mA (V–) + 1.5V ≤ VOUT ≤ – 1V + V+ VOUT – 1.235V 10k 4 – 5 IOUT = —R—SE—T 1 3 LTC2050 3 + 5 RSET + 2 1 RSET 10k 4 LTC2050 – 2 1.235V + IOUT = —R—SE—T V– VOUT – 00 .≤2V IO ≤U VT O≤U 4Tm ≤A (V+) – 1.5V LT1034 2050 TA05 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC1049 Low Power Zero-Drift Op Amp Low Supply Current 200µA LTC1050 Precision Zero-Drift Op Amp Single Supply Operation 4.75V to 16V, Noise Tested and Guaranteed LTC1051/LTC1053 Precision Zero-Drift Op Amp Dual/Quad LTC1150 ±15V Zero-Drift Op Amp High Voltage Operation ±18V LTC1152 Rail-to-Rail Input and Output Zero-Drift Op Amp Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown LT®1677 Low Noise Rail-to-Rail Input and Output V = 90µV, V = 2.7V to 44V OS S Precision Op Amp LT1884/LT1885 Rail-to-Rail Output Precision Op Amp V = 50µV, I = 400pA, V = 2.7V to 40V OS B S LTC2051 Dual Zero-Drift Op Amp Dual Version of the LTC2050 in MS8 Package Rev. E 18 11/18 www.analog.com For more information www.analog.com  ANALOG DEVICES, INC. 1999-2018