INA290A5IDCKR

Overview

The INA290A5IDCKR is a single-channel, high-side 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 supply voltage between 2.7 V and 20 V. The device provides a fixed gain of 500 V/V with a maximum gain error of ±0.1% and a typical DC CMRR of 160 dB. Key electrical parameters include an input offset voltage of ±12 µV (maximum), input bias current of 20 µA (typical), quiescent current of 370 µA, and a bandwidth of 800 kHz at the 500 V/V gain setting. It is housed in a space-efficient SC-70 package.

Feature Summary

• Ultra-precise measurement capability enabled by zero-drift architecture for low offset voltage and drift across extended temperature ranges.
• High common-mode rejection ratio ensures accurate signal processing despite large common-mode voltage fluctuations.
• Wide operational common-mode voltage range supports high-side sensing in systems with bus voltages up to 120 V.
• Compact SC-70 packaging design facilitates integration into space-constrained circuit boards.

Applications

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

Procurement Notes

Verify the specific suffix IDCKR corresponds to the SC-70-5 package and tape-and-reel delivery format as documented in the manufacturer's ordering information. Confirm that the A5 designation strictly indicates the 500 V/V fixed gain configuration required for your circuit design. Ensure compatibility with the specified operating temperature range and supply voltage limits before finalizing procurement orders.

Selection Notes

Select this component when high-side current monitoring is required within a 120 V common-mode environment. The 500 V/V gain is suitable for detecting small differential voltages across low-value shunt resistors. Consider the 370 µA quiescent current for power-sensitive designs. Verify that the 800 kHz bandwidth meets the dynamic response requirements of the target application.

Part Context

This device belongs to the INAx290 family of ultra-precise current-sense amplifiers. The family includes dual-channel (INA2290) and quad-channel (INA4290) variants. All members share the same core transconductance architecture and performance characteristics but differ in channel count and physical package dimensions to suit various multi-rail or high-density applications.

Replacement Considerations

The INA280A5IDCKR serves as a functional substitute within the same series, offering similar specifications but classified under high-precision rather than ultra-precision metrics. Verify that the gain error and offset voltage tolerances of the alternative part meet the strict accuracy requirements of the original design.

FAQ

What is the minimum common-mode voltage relative to the supply voltage?

The minimum common-mode voltage is restricted by the supply voltage; it cannot operate below the VS pin potential under standard conditions.

Can external resistors be used to modify the gain of the INA290A5IDCKR?

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

How does the bandwidth change with different gain settings?

The bandwidth is gain-dependent; at the 500 V/V gain setting, the bandwidth is 800 kHz, whereas lower gain options provide higher bandwidths up to 1.1 MHz.