INA2290A1IDGKT

Overview

The INA2290A1IDGKT 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 20 V/V, it delivers a maximum gain error of ±0.1% and an input offset voltage of ±25 µV. The device offers a bandwidth of 1.1 MHz and a quiescent current of 680 µA. Packaged in an 8-pin VSSOP, it supports high-side sensing for precise DC and AC current measurements.

Feature Summary

• Ultra-precise zero-drift architecture ensures low offset voltage and drift across the extended temperature range
• Wide common-mode voltage range enables high-side sensing up to 120 V with excellent CMRR
• High bandwidth and fast slew rate support rapid detection of overcurrent events
• Dual-channel configuration provides space-efficient monitoring in compact packages

Applications

• Active antenna system mMIMO (AAS)
• Macro remote radio unit (RRU)
• 48-V rack server power distribution
• Test and measurement equipment
• Fast overcurrent protection circuits

Procurement Notes

Verify the specific ordering suffix IDGKT corresponds to the 8-pin VSSOP package and tape-and-reel delivery format. Confirm that the A1 designation matches the required 20 V/V gain setting for your circuit design. Check for any recent production data status updates or assembly site notifications on the manufacturer website before finalizing procurement plans.

Selection Notes

Select this component when dual-channel high-side current sensing is required within a wide common-mode voltage window. The 20 V/V gain option is suitable for applications requiring a wider dynamic range compared to higher gain variants. Ensure the PCB layout accommodates the VSSOP footprint and adheres to thermal dissipation guidelines for the specified ambient temperature 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 common-mode specifications but differ in channel count and physical package dimensions. The INA2290 specifically addresses designs needing two independent current sense channels in a small form factor.

Replacement Considerations

Official substitutes include other gain options within the INA2290 family, such as INA2290A2IDGKT (50 V/V), INA2290A3IDGKT (100 V/V), INA2290A4IDGKT (200 V/V), and INA2290A5IDGKT (500 V/V). These parts maintain identical pinouts and electrical characteristics except for the internal fixed gain value.

FAQ

What is the minimum common-mode voltage allowed for operation?

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

Can this amplifier be used for low-side current sensing?

No, the INAx290 topology restricts operation to high-side current-sensing applications only due to its internal amplifier design and common-mode input requirements.

How does the bandwidth vary with gain settings?

The -3-dB bandwidth is gain-dependent. For the A1 device with 20 V/V gain, the bandwidth is 1.1 MHz. Higher gain options result in lower bandwidth values, ranging down to 800 kHz for the 500 V/V gain variant.