LT1920IS8#PBF

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. 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. The output can handle capacitive loads up to 1000pF in any gain configuration while the inputs are ESD protected up to 13kV (human body). The LT1920 with two external 5k resistors passes the IEC 1000 - 4 - 2 level 4 specification. The LT1920, offered in 8 - pin PDIP and SO packages, is a pin - for - pin and spec - for - spec improved replacement for the AD620. The LT1920 is the most cost - effective solution for precision instrumentation amplifier applications.

Applications

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

Key features

• 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