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LT1789-10 Dataheets PDF



Part Number LT1789-10
Manufacturers Linear Technology
Logo Linear Technology
Description (LT1789-1/-10) Single Supply Rail-to-Rail Output Instrumentation Amplifiers
Datasheet LT1789-10 DatasheetLT1789-10 Datasheet (PDF)

LT1789-1/LT1789-10 Micropower, Single Supply Rail-to-Rail Output Instrumentation Amplifiers FEATURES s s s s DESCRIPTIO s s s s s s s s s U APPLICATIO S s s s s s s Micropower: 95µA Supply Current Max Low Input Offset Voltage: 100µV Max Low Input Offset Voltage Drift: 0.5µV/°C Max Single Gain Set Resistor: G = 1 to 1000 (LT1789-1) G = 10 to 1000 (LT1789-10) Inputs Common Mode to V – Wide Supply Range: 2.2V to 36V Total Supply CMRR at G = 10: 96dB Min Gain Error: G = 10, 0.25% Max Gain Nonli.

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LT1789-1/LT1789-10 Micropower, Single Supply Rail-to-Rail Output Instrumentation Amplifiers FEATURES s s s s DESCRIPTIO s s s s s s s s s U APPLICATIO S s s s s s s Micropower: 95µA Supply Current Max Low Input Offset Voltage: 100µV Max Low Input Offset Voltage Drift: 0.5µV/°C Max Single Gain Set Resistor: G = 1 to 1000 (LT1789-1) G = 10 to 1000 (LT1789-10) Inputs Common Mode to V – Wide Supply Range: 2.2V to 36V Total Supply CMRR at G = 10: 96dB Min Gain Error: G = 10, 0.25% Max Gain Nonlinearity: G = 10, 40ppm Max Input Bias Current: 40nA Max PSRR at G = 10: 100dB Min 1kHz Voltage Noise: 48nV/√Hz 0.1Hz to 10Hz Noise: 1.5µVP-P Portable Instrumentation Bridge Amplifiers Strain Gauge Amplifiers Thermocouple Amplifiers Differential to Single-Ended Converters Medical Instrumentation The LT ®1789-1/LT1789-10 are micropower, precision instrumentation amplifiers that are optimized for single supply operation from 2.2V to 36V. The quiescent current is 95µA max, the inputs common mode to ground and the output swings within 110mV of ground. The gain is set with a single external resistor for a gain range of 1 to 1000 for the LT17891 and 10 to 1000 for the LT1789-10. The high accuracy of the LT1789-1 (40ppm maximum nonlinearity and 0.25% max gain error) is unmatched by other micropower instrumentation amplifiers. The LT1789-10 maximizes both the input common mode range and dynamic output range when an amplification of 10 or greater is required, allowing precise signal processing where other instrumentation amplifiers fail to operate. The LT1789-1/ LT1789-10 are laser trimmed for very low input offset voltage, low input offset voltage drift, high CMRR and high PSRR. The output can handle capacitive loads up to 400pF (LT1789-1), 1000pF (LT1789-10) in any gain configuration while the inputs are ESD protected up to 10kV (human body). The LT1789-1/LT1789-10 are offered in the 8-pin SO package, requiring significantly less PC board area than discrete multi op amp and resistor designs. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIO 0.5A to 4A Voltage Controlled Current Source C1 4700pF VS R1 90.9k VIN R2 10k VS 2 – + C3 0.1µF 6 5 R3 100Ω VS 7 R4 10k 6 REF 1 5 4 8k 120Ω TIP127* 7 LT1636 4 3 + 3 8 3 1 2 4 LT1789-1 ILOAD = VS = 3.3V TO 32V VIN RSENSE • 10 = 1A PER VOLT AS SHOWN C2 3300pF – 2 RISE TIME ≈ 250µs, 10% TO 90%, 1A TO 2A OUTPUT STEP INTO 0.25Ω LOAD U * ENSURE ADEQUATE POWER DISSIPATION CAPABILITY AT HIGHER VOLTAGES, CURRENTS AND DUTY CYCLES RSENSE* 0.1Ω ILOAD RLOAD* 1789 TA01 U 1789f 1 LT1789-1/LT1789-10 ABSOLUTE (Note 1) AXI U RATI GS U U W PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER TOP VIEW RG 1 –IN 2 +IN 3 –VS 4 8 RG 7 +VS 6 OUT 5 REF Supply Voltage (V+ to V–) ........................................ 36V Input Differential Voltage ......................................... 36V Input Current (Note 3) ........................................ ± 20mA Output Short-Circuit Duration .......................... Indefinite Operating Temperature Range ................ – 40°C to 85°C Specified Temperature Range (Note 4) LT1789C-1, LT1789C-10 .................... – 40°C to 85°C LT1789I-1, LT1789I-10 ...................... – 40°C to 85°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C VS = 3V, 0V; VS = 5V, 0V; R L = 20k, VCM = VREF = half supply, TA = 25°C, unless otherwise noted. SYMBOL PARAMETER G Gain Range Gain Error (Note 6) CONDITIONS LT1789-1, G = 1 + (200k/RG) LT1789-10, G = 10 • [1+ (200k/RG)] G = 1, VO = 0.1V to (+VS) – 1V LT1789-1, VO = 0.1V to (+VS) – 0.3V LT1789-10, VO = 0.2V to (+VS) – 0.3V G = 10, (Note 2) G = 100, (Note 2) G = 1000, (Note 2) Gain Nonlinearity (Note 6) G = 1, VO = 0.1V to (+VS) – 1V LT1789-1, VO = 0.1V to (+VS) – 0.3V LT1789-10, VO = 0.2V to 4.7V, VS = 5V (Note 8) G = 10 G = 100 G = 1000 VOST VOSI VOSO IOS IB en Total Input Referred Offset Voltage VOST = VOSI + VOSO/G Input Offset Voltage Output Offset Voltage Input Offset Current Input Bias Current Input Noise Voltage, RTI (Referred to Input) G = 1000 G = 1 (LT1789-1), G =10 (LT1789-10) (Note 6) (Note 6) G = 1, fO = 0.1Hz to 10Hz G = 10 G = 100, 1000 15 150 0.2 19 5.0 1.5 1.0 100 750 4 40 20 650 0.2 19 4.6 1.1 160 3000 4 40 µV µV nA nA µVP-P µVP-P µVP-P MIN 1 0.02 LT1789-1 TYP MAX 1000 10 0.20 1000 % MIN LT1789-10 TYP MAX UNITS 3V and 5V ELECTRICAL CHARACTERISTICS 2 U W W W LT1789CS8-1 LT1789IS8-1 LT1789CS8-10 LT1789IS8-10 S8 PART MARKING 17891 1789I1 178910 789I10 S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 190°C/ W Consult LTC Marketing for parts specified with wider operating temperature ranges. 0.06 0.06 0.13 35 0.25 0.27 100 0.01 0.09 0.16 0.25 0.30 % % % ppm 12 18 90 40 75 15 20 100 100 100 ppm ppm ppm 1789f LT1789-1/LT1789-10 3V and 5V ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER Total RTI Noise = √eni2 + (eno/G)2 eni eno in RIN CIN VCM CMRR Input Noise Voltage.


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