Texas Instruments INA188 Instrumentation Amplifier, SOIC-8

The Texas Instruments INA188IDR is a high-precision instrumentation amplifier that leverages proprietary auto-zeroing technology to deliver exceptional accuracy and stability for demanding measurement applications. This device achieves remarkably low offset voltage, near-zero drift over temperature, excellent linearity, and a very low noise density of 12nV/√Hz, extending right down to DC.

Optimised for high-resolution measurement, the INA188 provides outstanding common-mode rejection of greater than 104dB (at G≥10), minimising interference from unwanted signals. Its versatile three op-amp architecture features a rail-to-rail output swing, supporting operation from a single 4V supply up to dual supplies of ±18V, alongside a wide, high-impedance input range. These characteristics make it an ideal solution for universal signal measurement and precise sensor conditioning, such as in temperature sensing or bridge amplifier circuits.

Key Features & Benefits

• Precision Performance: Ultra-low 25µV input offset voltage and a maximum drift of just 0.2µV/°C ensure long-term accuracy and stability.
• Excellent Noise & Rejection: Low input noise and superior common-mode and power supply rejection enable clean signal acquisition in electrically noisy environments.
• Flexible Design: Gain is easily set with a single external resistor, offering design simplicity and flexibility.
• RFI-Filtered Inputs: Integrated input filtering helps reduce errors caused by radio frequency interference.
• Efficient Operation: Consumes a low quiescent current of 1.4mA, making it suitable for portable and battery-powered devices.
• Robust Construction: Offered in a compact, surface-mount SOIC-8 package with an extended operating temperature range from -40°C to 125°C.
• Environmentally Conscious: Manufactured as a green product, containing no antimony or bromine (no Sb/Br).

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