INA4290A2IRGVR

Instrumentation, Op Amps, Buffer Amps Overview

The INA4290A2IRGVR is a quad-channel, high-voltage current-sense amplifier from Texas Instruments. It features a wide common-mode voltage range of 2.7 V to 120 V and operates on a single supply voltage between 2.7 V and 20 V. The device provides a fixed gain of 50 V/V with a typical DC common-mode rejection ratio (CMRR) of 160 dB and an AC CMRR of 85 dB at 50 kHz. Key electrical specifications include a maximum input offset voltage of ±20 µV, a maximum gain error of ±0.1%, and a bandwidth of 1.1 MHz. It utilizes a zero-drift architecture for precision measurements across an operating temperature range of -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-precise measurement capability enabled by zero-drift topology and low input offset voltage.
• High common-mode rejection ratio ensures accurate signal processing over a wide voltage range.
• Wide bandwidth supports fast response times required for rapid overcurrent protection detection.

Instrumentation, Op Amps, Buffer Amps Applications

• Active antenna system mMIMO
• Macro remote radio unit
• 48-V rack server power supplies

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'RGVR' corresponds to the QFN-16 package and reel packaging configuration. Confirm that the 'A2' designation matches the required 50 V/V gain setting for your circuit design. Ensure compatibility with the specified 2.7 V to 20 V supply voltage range and check thermal requirements for the 4 mm x 4 mm QFN package in your final assembly.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when multiple independent current sensing channels are required within a compact footprint. The quad-channel configuration reduces board space compared to using four separate single-channel amplifiers. Choose this part if the application demands high accuracy with minimal drift over temperature variations and requires handling common-mode voltages up to 120 V.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the INAx290 family of ultra-precise current-sense amplifiers. While the single-channel INA290 uses an SC-70 package and the dual-channel INA2290 uses a VSSOP package, the INA4290 variant specifically integrates four channels into a 16-pin QFN package. This family shares core architectural features such as the transconductance design and zero-drift input stage.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct functional replacements within the same family include the INA290A2 for single-channel applications or the INA2290A2 for dual-channel needs. For other manufacturers, verify equivalent specifications regarding common-mode voltage limits, gain accuracy, and package dimensions before substitution.

Instrumentation, Op Amps, Buffer Amps FAQ

What is the maximum common-mode voltage supported by the INA4290?

The INA4290 supports a common-mode voltage range from 2.7 V to 120 V.

How does the zero-drift architecture benefit this amplifier?

The zero-drift architecture minimizes input offset voltage and offset drift, enabling precise current measurements even at low sense voltages across the full operating temperature range.