INA190A4NDDFREP

Overview

The INA190A4NDDFREP is a bidirectional, low-power, zero-drift precision current sense amplifier from the Enhanced Product (EP) series. It features a fixed gain of 200 V/V and operates with supply voltages between 1.7 V and 5.5 V. The device supports common-mode voltages from -0.2 V to +40 V and includes an enable pin for power management. Key electrical specifications include a minimum common-mode rejection ratio of 132 dB, a maximum offset voltage of ±15 µV, and a typical quiescent current of 50 µA. It is housed in an SOT-23-THIN-8 package.

Feature Summary

• Zero-drift architecture ensures high accuracy with minimal offset voltage drift over temperature.
• Capacitively coupled input stage provides extremely low input bias currents for precise microamp-level measurements.
• Integrated enable pin allows for deep sleep mode operation with negligible standby current consumption.
• Bidirectional sensing capability enables monitoring of current flow in both directions using a reference voltage.

Applications

• Avionics systems
• Radar Systems
• Smart Munitions

Procurement Notes

Verify the specific suffix 'DDFREP' corresponds to the SOT-23-THIN-8 package and tape-and-reel delivery format. Confirm that the 'EP' designation meets project requirements for controlled baseline, single fabrication site, and extended product life cycle notifications. Ensure compatibility with defense or aerospace qualification standards if applicable.

Selection Notes

Select this component when high-side or low-side current monitoring is required at common-mode voltages up to 40 V. The 200 V/V gain is suitable for applications requiring significant signal amplification from small shunt resistors. Consider the wide operating temperature range (-55°C to +150°C) for harsh environment deployments where standard commercial grade parts may fail.

Part Context

This part belongs to the INA190-EP family of enhanced product current sense amplifiers designed for ruggedized applications. Unlike standard commercial variants, EP devices offer controlled baselines and traceability. The A4 variant specifically provides a 200 V/V gain, distinguishing it from other gains like 25 V/V or 500 V/V within the same series.

Replacement Considerations

Direct replacements within the same EP family include INA190A2NDDFREP (50 V/V gain) or INA190A3NDDFREP (100 V/V gain). Verify that the gain difference does not impact system dynamic range. Standard commercial INA190 parts lack the EP reliability features and should only be considered if environmental constraints are relaxed.