INA280A2IDCKR

Overview

The INA280A2IDCKR is a high-precision, unidirectional current-sense amplifier manufactured by Texas Instruments. It features a fixed gain of 50 V/V and operates with a wide common-mode voltage range from 2.7 V to 120 V. The device offers a bandwidth of 1.1 MHz and a slew rate of 2 V/µs. Key electrical specifications include a maximum offset voltage of ±150 µV, a typical DC CMRR of 140 dB, and a quiescent current of 370 µA. It functions within a supply voltage range of 2.7 V to 20 V and is housed in a space-efficient SC-70 (DCK) package.

Feature Summary

• High-speed performance with 1.1 MHz bandwidth and 2 V/µs slew rate for rapid overcurrent detection
• Wide common-mode input range supporting operational voltages up to 120 V
• Ultra-low offset voltage and drift ensuring precision across extended temperature ranges
• Fixed internal gain of 50 V/V optimized for specific signal-to-noise requirements

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 ordering suffix IDCKR corresponds to the SC-70-5 package variant. Confirm the A2 suffix indicates the 50 V/V fixed gain configuration. Ensure the component meets RoHS compliance standards required for your manufacturing process. Cross-reference the datasheet revision history for any updates to electrical characteristics or pin configurations before finalizing procurement.

Selection Notes

Select this part when a fixed 50 V/V gain is optimal for the target shunt resistor value and expected current range. The wide common-mode range allows high-side sensing on rails up to 120 V. Consider the 1.1 MHz bandwidth if fast transient response is critical. Verify that the output swing limitations align with the downstream ADC or microcontroller input voltage levels.

Part Context

This component belongs to the INA280 family of high-precision current sense amplifiers. The family provides multiple gain options (20, 50, 100, 200, and 500 V/V) to suit various dynamic range needs. The INA280 series is designed for applications requiring high accuracy and fast response times in harsh electrical environments.

Replacement Considerations

Other gains in the INA280 family (INA280A1, A3, A4, A5) share the same package and pinout but offer different fixed gains. For bidirectional sensing, consider the INA282 series. General-purpose op amps are not direct replacements due to the specialized current-sense architecture.