INA2128P

Overview

The INA2128P is a dual, low-power instrumentation amplifier manufactured by Texas Instruments in a 16-pin PDIP package. It features a maximum input offset voltage of 50µV and a drift of 0.5µV/°C. The device operates with a supply voltage range of ±2.25V to ±18V (4.5V to 36V total) and draws 700µA per channel. Key electrical parameters include a gain bandwidth product of 1.3MHz, a slew rate of 4V/µs, an input bias current of 5nA max, and a common-mode rejection ratio of 120dB. Gain is adjustable from 1 V/V to 10,000 V/V.

Feature Summary

• Dual-channel architecture providing two independent instrumentation amplifiers in a single package for space-constrained designs.
• Low power consumption design suitable for battery-operated applications with minimal quiescent current draw.
• High precision performance characterized by low offset voltage and low drift to ensure accurate signal conditioning.
• Wide gain adjustment capability allowing flexible configuration for various sensor interface requirements.

Applications

• Precision data acquisition systems requiring high accuracy and low noise.
• Industrial process control loops involving sensor signal conditioning.
• Medical instrumentation equipment demanding high common-mode rejection and stability.

Procurement Notes

Verify the specific suffix against the official datasheet to confirm pinout and electrical characteristics. Confirm package type matches system requirements. Check for obsolescence status as some variants may be discontinued. Ensure operating temperature range aligns with environmental conditions. Validate component authenticity through authorized channels.

Selection Notes

Select this component when dual instrumentation amplifiers are needed with low power constraints. Consider the 16-pin DIP package for prototyping or through-hole assembly needs. Evaluate the 1.3MHz bandwidth against signal frequency requirements. Compare offset voltage specifications against application tolerance levels. Verify supply voltage compatibility with available power rails.

Part Context

The INA2128 belongs to Texas Instruments' family of low-power instrumentation amplifiers. It serves as a dual-channel alternative to single-channel counterparts like the INA2126. The P suffix denotes the plastic dual in-line package variant. This series is designed for general-purpose precision amplification tasks where size and power efficiency are critical factors.

Replacement Considerations

INA2128UA: Surface mount SOIC-16 variant with identical electrical specifications. INA2128U: Tape and reel version of the surface mount package. Verify pin compatibility and thermal performance when switching between DIP and SMD packages.