INA129UA/2K5G4

Overview

The INA129UA/2K5G4 is a precision, low-power instrumentation amplifier manufactured by Texas Instruments. It features a single channel with a 1.3 MHz bandwidth and a 4 V/us slew rate. The device operates on supply voltages ranging from 4.5 V to 36 V. Key electrical specifications include a common-mode rejection ratio of 120 dB, an input bias current of 5 nA, and an input offset voltage of 50 uV. It consumes 700 uA of operating supply current and functions within a temperature range of -40 C to +125 C in an SOIC-8 package.

Feature Summary

• High common-mode rejection ratio for accurate signal amplification
• Low power consumption suitable for battery-operated systems
• Precision performance with low input offset voltage and bias current

Applications

• Strain gauge and bridge sensor interfaces
• Medical equipment signal conditioning
• Industrial process control systems
• Data acquisition channels
• Photodiode preamplifiers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to ensure correct packaging and tape-and-reel quantities. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer before placing orders. Ensure the component matches the required temperature grade and package variant for your specific design constraints.

Selection Notes

Select this component when high accuracy and low power are critical requirements. The 120 dB CMRR makes it suitable for noisy environments. Compare its 700 uA supply current against other instrumentation amplifiers if power efficiency is a primary constraint. Ensure the 36 V maximum supply voltage aligns with your system's power rails.

Part Context

This part belongs to the INA129 series of precision instrumentation amplifiers from Texas Instruments. It is designed as a drop-in replacement for older Burr-Brown models. The series is known for combining high performance with low power consumption, making it a standard choice for general-purpose precision amplification tasks in analog signal processing circuits.

Replacement Considerations

Official substitutes include the INA128U and INA129U variants. Verify pin compatibility and electrical parameter equivalence with the official datasheet before substitution. Consider the INA129UAE4 for lead-free compliance if required by your manufacturing standards.