INA290A2IDCKT

Overview

The INA290A2IDCKT is a single-channel, high-side current-sense amplifier from the INAx290 family. 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 50 V/V (A2 suffix), a typical DC CMRR of 160 dB, and a bandwidth of 1.1 MHz at G=20 V/V. Key electrical characteristics include a maximum offset voltage of ±20 µV, an input bias current of 20 µA, and a quiescent current of 370 µA per channel. It is housed in a space-efficient SC-70 package.

Feature Summary

• Ultra-precise zero-drift architecture enables accurate measurement of low sense voltages across extended temperature ranges.
• High common-mode rejection ratio ensures signal integrity under varying bus conditions.
• Wide operating supply range allows compatibility with various system power architectures.

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 A2 gain variant matches the required 50 V/V amplification for the target circuit design. Confirm the SC-70 package dimensions align with PCB layout constraints. Ensure the operating environment stays within the specified -40°C to +125°C temperature range for guaranteed performance parameters.

Selection Notes

Select this component when high precision and wide common-mode voltage are required in a compact footprint. The 50 V/V gain option is suitable for applications needing moderate signal amplification without excessive output swing limitations. Consider the 1.1 MHz bandwidth for fast transient detection needs.

Part Context

This part belongs to the INAx290 series of ultra-precise current-sense amplifiers. The series includes dual-channel (INA2290) and quad-channel (INA4290) variants. The 'A2' designation specifically indicates the internal fixed gain setting of 50 V/V, distinguishing it from other gain options like 20 V/V or 100 V/V available in the same family.

Replacement Considerations

Direct pin-to-pin replacements within the same family include INA290A1IDCKT (20 V/V gain), INA290A3IDCKT (100 V/V gain), INA290A4IDCKT (200 V/V gain), and INA290A5IDCKT (500 V/V gain). Verify that the gain difference does not impact the system's dynamic range requirements.