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INA129P

TIINA129P

Texas Instruments
Instrumentation Amplifiers INST AMP PREC LO PWR
61 in stock
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Overview

The INA129P is a precision instrumentation amplifier designed for low-power, high-accuracy signal conditioning. It uses a three-op-amp architecture and a single external resistor to set gain from 1 to 10,000, offering excellent common-mode rejection for small signals in noisy environments.

Why Choose This Part

The device features a very low offset voltage and low drift, ensuring stability over time and temperature. Its wide supply range and low quiescent current make it versatile for both battery-powered and line-powered industrial designs.

Applications

Bridge Amplifiers
Ideal for strain gauges, load cells, and Wheatstone bridge sensor interfaces in industrial weighing systems.
RTD Temperature Sensing
Provides the high input impedance and precision required for accurate resistance temperature detector measurements.
Industrial Process Control
Functions as a robust front-end for 4-20mA current loop receivers and PLC analog inputs.
Medical Instrumentation
Suitable for non-critical patient monitoring equipment requiring low-noise differential signal amplification.

Getting Started

When prototyping, place the gain-setting resistor as close to pins 1 and 8 as possible to minimize parasitic capacitance and noise pickup. Ensure adequate power supply decoupling with 0.1uF ceramic capacitors located near the IC pins.

Also Consider

INA128PA TITexas Instruments - Offers similar precision and pinout but with a slightly different gain equation for specific application tuning.
AD620ANZ Analog Devices - The industry-standard alternative in a DIP-8 package with comparable gain range and noise performance.