INA2290A2IDGKT

Overview

The INA2290A2IDGKT is a dual-channel, ultra-precise current-sense amplifier from Texas Instruments. It operates with a common-mode voltage range of 2.7 V to 120 V and a supply voltage of 2.7 V to 20 V. Featuring a fixed gain of 50 V/V, it delivers a maximum offset voltage of ±20 µV and a DC CMRR of 160 dB. The device offers a bandwidth of 1.1 MHz and a quiescent current of 370 µA per channel. It is housed in an 8-pin VSSOP package and functions within an ambient temperature range of -40°C to +125°C.

Feature Summary

• Ultra-precise zero-drift architecture ensures high accuracy with low offset voltage and drift across the extended operating temperature range.
• Wide common-mode voltage capability allows measurement over a broad range from 2.7 V to 120 V with excellent rejection ratios.
• High-speed performance supports fast overcurrent protection applications through a 1.1 MHz bandwidth and 2 V/µs slew rate.

Applications

• Active antenna system mMIMO (AAS)
• Macro remote radio unit (RRU)
• 48-V rack server power monitoring
• Test and measurement equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure the selected variant matches the required gain option and thermal performance for the intended application environment.

Selection Notes

Select this component when high-side current sensing requires precision over a wide common-mode voltage range. The dual-channel configuration is suitable for multi-rail systems. Consider the 50 V/V gain setting relative to the expected sense voltage and ADC input range to optimize dynamic range.

Part Context

This device belongs to the INAx290 family, which includes single-channel (INA290) and quad-channel (INA4290) variants. All members share the same core ultra-precise architecture and electrical characteristics, differing primarily in channel count and physical package dimensions.

Replacement Considerations

Official substitutes within the same family include the INA290 for single-channel needs or the INA4290 for quad-channel requirements. Verify that the replacement part number maintains the identical A2 gain designation and VSSOP packaging.

FAQ

What is the minimum common-mode voltage allowed?

The minimum common-mode voltage is restricted by the supply voltage. Operation is possible down to 2.7 V, provided the common-mode voltage does not fall below the supply rail under normal conditions.

Can external resistors be used to change the gain?

No. The closed-loop gain is set by an internal precision resistor network. Adding external resistance is not recommended due to variations in absolute resistor values, which would compromise accuracy.