INA280A5IDCKR

Overview

The INA280A5IDCKR is a high-precision, unidirectional current-sense amplifier from Texas Instruments. It features a fixed gain of 500 V/V and operates with a supply voltage range of 2.7 V to 20 V. The device supports a wide common-mode input voltage range from 2.7 V to 120 V. Key electrical specifications include a typical DC common-mode rejection ratio (CMRR) of 140 dB, an offset voltage of ±150 µV maximum, and a quiescent current of 370 µA. It provides a bandwidth of 800 kHz at the 500 V/V gain setting and a slew rate of 2 V/µs.

Feature Summary

• High precision measurement capability enabled by low offset voltage and drift characteristics
• Wide common-mode voltage range supporting operation up to 120 V
• High-speed response suitable for fast overcurrent protection applications

Applications

• Active antenna system mMIMO (AAS)
• 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. Confirm the A5 designation matches the required 500 V/V gain for your circuit design. Ensure the operating environment stays within the specified -40°C to +125°C temperature range. Check for RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this component when a high gain of 500 V/V is necessary to amplify small differential signals across a shunt resistor. It is suitable for high-side sensing applications where the common-mode voltage exceeds the supply rail. Consider the 800 kHz bandwidth and 9 µs settling time for dynamic load requirements. Ensure the output swing can accommodate the amplified signal relative to the 2.7 V to 20 V supply range.

Part Context

This device belongs to the INA280 family of high-precision current sense amplifiers. The family offers multiple gain options ranging from 20 V/V to 500 V/V to optimize dynamic range. The INA280 series is designed for space-constrained designs using the compact SC-70 package. It targets industrial and telecom applications requiring accurate current monitoring in high-voltage environments.

Replacement Considerations

Other variants within the INA280 family offer different fixed gains: INA280A1 (20 V/V), INA280A2 (50 V/V), INA280A3 (100 V/V), and INA280A4 (200 V/V). These share identical pinouts and general specifications but differ in internal resistor networks. Verify that the alternative gain meets your signal amplification requirements.