LT1920

LT1920 Single Resistor Gain Programmable, Precision Instrumentation Amplifier FEATURES s s s s s s s s s s s s s s DESCRIPTIO Single Gain Set Resistor: G = 1 to 10,000 Gain Error: G = 10, 0.3% Max Gain Nonlinearity: G = 10, 30ppm Max Input Offset Voltage: G = 10, 225µV Max Input Offset Voltage Drift: 1µV/°C Max Input Bias Current: 2nA Max PSRR at G = 1: 80dB Min CMRR at G = 1: 75dB Min Supply Current: 1.3mA Max Wide Supply Range: ± 2.3V to ± 18V 1kHz Voltage Noise: 7.5nV/√Hz 0.1Hz to 10Hz Noise: 0.28µVP-P Available in 8-Pin PDIP and SO Packages Meets IEC 1000-4-2 Level 4 ESD Tests with Two External 5k Resistors U APPLICATIO S s s s s s Bridge Amplifiers Strain Gauge Amplifiers Thermocouple Amplifiers Differential to Single-Ended Converters Medical Instrumentation The LT ®1920 is a low power, precision instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. The low voltage noise of 7.5nV/√Hz (at 1kHz) is not compromised by low power dissipation (0.9mA typical for ± 2.3V to ±15V supplies). The high accuracy of 30ppm maximum nonlinearity and 0.3% max gain error (G = 10) is not degraded even for load resistors as low as 2k (previous monolithic instrumentation amps used 10k for their nonlinearity specifications). The LT1920 is laser trimmed for very low input offset voltage (125µV max), drift (1µV/°C), high CMRR (75dB, G = 1) and PSRR (80dB, G = 1). Low input bias currents of 2nA max are achieved with the use of superbeta processing. Th...