INA290A1IDCKT

Overview

The INA290A1IDCKT is a single-channel, high-side current-sense amplifier from Texas Instruments. It operates with a supply voltage of 2.7 V to 20 V and supports a common-mode input range from 2.7 V to 120 V. The device features a fixed gain of 20 V/V, a maximum offset voltage of ±25 µV, and a typical DC common-mode rejection ratio (CMRR) of 160 dB. It offers a bandwidth of 1.1 MHz and draws a quiescent current of 370 µA. The component is housed in a space-efficient SC-70 package and functions within an ambient temperature range of -40°C to +125°C.

Feature Summary

• Ultra-precise zero-drift architecture enables accurate measurement of low sense voltages across the full operating temperature range.
• High common-mode rejection ratio ensures signal integrity over wide common-mode voltage variations.
• Wide bandwidth and fast slew rate support rapid detection and processing of overcurrent events.

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape-and-reel specifications for automated assembly. Confirm that the device revision aligns with the latest datasheet documentation to ensure compatibility with existing design parameters. Check for any recent product change notifications regarding manufacturing sites or material composition updates before finalizing procurement orders.

Selection Notes

Select this part when a fixed gain of 20 V/V is required to maximize dynamic range for larger differential input signals. The wide common-mode voltage capability makes it suitable for high-voltage bus monitoring applications. Ensure the system can accommodate the specified quiescent current consumption and that the SC-70 package dimensions fit the available board space constraints.

Part Context

This component belongs to the INAx290 family of ultra-precise current-sense amplifiers. The family includes dual-channel (INA2290) and quad-channel (INA4290) variants designed for multi-rail monitoring. All devices share the same core transconductance architecture and zero-drift technology but differ in channel count and physical package options to suit various density requirements.

Replacement Considerations

Direct pin-to-pin replacements within the same family include INA290A2IDCKT, INA290A3IDCKT, INA290A4IDCKT, and INA290A5IDCKT. These alternatives offer different fixed gains (50 V/V, 100 V/V, 200 V/V, and 500 V/V respectively) while maintaining identical electrical characteristics and package footprints.

FAQ

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

The minimum common-mode voltage is restricted by the supply voltage; it cannot be lower than the VS supply rail.

Can external resistors be added to change the gain of the INA290A1IDCKT?

No, the closed-loop gain is set by internal precision resistors. Adding external resistance is not recommended due to potential variation in absolute resistor values affecting accuracy.