DESCRIPTION

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 LT1789-1 and 10 to 1000 for the LT1789-10.

FEATURES

■ 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

APPLICATIONS

■ Portable Instrumentation
■ Bridge Amplifiers
■ Strain Gauge Amplifiers
■ Thermocouple Amplifiers
■ Differential to Single-Ended Converters
■ Medical Instrumentation