The INA188 from Texas Instruments is a precision instrumentation amplifier that uses TI's proprietary auto-zero technology. This enables low bias voltage, near-zero bias and gain drift, excellent linearity, and very low noise density (12 nV/√Hz), extending to DC.
The INA188 is optimized to provide better than 104 dB (G≥10) common-mode rejection. Superior common-mode and power-supply rejection support high-resolution, precise measurement applications. The versatile triple op amp design provides rail-to-rail output, low voltage operation from 4v single or dual supply ±18v, and a wide, high impedance input range. These specifications make this device ideal for general-purpose signal measurement and sensor conditioning, such as temperature or bridge applications.
An external resistor can set the gain from 1 to 1000. The INA188 design uses the industry standard gain equation: G = 1 + (50 k ohms / R(G)). The reference pin can be used for level shifting in single-supply operation or for offset calibration. The INA188 is suitable for a temperature range of -40°C to 125°C.
