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Texas Instruments INA151 Precision Difference Amplifiers

Texas Instruments INA151 Precision Difference Amplifiers come with an input common-mode voltage range of up to 110V above the negative supply (recommended). These amplifiers feature a 125dB minimum high common-mode rejection ratio, >1.4MΩ common-mode input impedance, and an offset-voltage drift of 0.6μV/ºC for 1V/V gain. The INA151 precision difference amplifiers are available with gains of 1V/V (INA151A), 2/3V/V (INA151B), 1/2V/V (INA151C), and 1/4V/V (INA151D). These amplifiers include an Enable/disable (EN) pin that provides a high-impedance output, allowing stacking multiple INA151s on the outputs. The INA151 precision difference amplifiers are available in a standard 8-pin package and a -40°C to 125°C specified temperature range. Typical applications include analog input module, mixed module (AI, AO, DI, and DO), precision multifunction input output DAQ, and battery cell formation, and test equipment.

Features

  • Wide voltage ranges:
    • 4.3V to 110V operational common-mode voltage
    • Down to -85V reverse protection voltage
    • Up to ±5V differential input voltage
  • High precision in high common-mode voltage systems:
    • 125dB (minimum) for G=1V/V, 2/3V/V CMRR
    • 2ppm/ºC (maximum) gain error drift
    • ±0.025% (maximum) for G=1V/V, 2/3V/V, 1/2V/V gain error
    • ±0.6μV/ºC (maximum) for G=1V/V offset voltage drift
    • ±900μV (maximum) for G=1V/V offset voltage
  • Four gain variants:
    • A: G = 1V/V
    • B: G = 2/3V/V
    • C: G = 1/2V/V
    • D: G = 1/4V/V
  • Ultra-high input impedance (minimum of 1MΩ)
  • Enable/disable function: Hi-Z output during disable
  • 620kHz (typical) for G=1V/V bandwidth
  • Power supply range:
    • 2.7V (±1.35V) to 20V (±10V) supply voltage range
    • 430µA (IQ(VS+) typical) and -460μA ((IQ(VS-) typical) low quiescent current when enabled
  • -40°C to 125°C specified temperature range

Applications

  • Battery cell formation and test equipment
  • Analog input module
  • Mixed module (AI, AO, DI, and DO)
  • Precision multifunction input output DAQ

Block Diagram

Block Diagram - Texas Instruments INA151 Precision Difference Amplifiers

Application Schematic of INA151B

Schematic - Texas Instruments INA151 Precision Difference Amplifiers
Published: 2026-05-11 | Updated: 2026-05-18