INA280A4IDCKR

Overview

The INA280A4IDCKR is a high-precision, unidirectional current-sense amplifier manufactured by Texas Instruments. It features a fixed gain of 200 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 from 2.7 V to 120 V, enabling high-side sensing in demanding environments. Key electrical specifications include a typical DC common-mode rejection ratio (CMRR) of 140 dB, an input offset voltage of ±150 µV maximum, and a quiescent current of 370 µA. It provides a bandwidth of 850 kHz at the 200 V/V gain setting and a slew rate of 2 V/µs.

Feature Summary

• Supports high-side current sensing with a wide common-mode voltage range up to 120 V.
• Delivers high precision through low offset voltage and high DC common-mode rejection ratio.
• Provides fast response capabilities suitable for rapid overcurrent detection and protection.
• Utilizes a compact SC-70 package to minimize PCB footprint requirements.

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 shipping configuration. Confirm the A4 designation indicates the 200 V/V fixed gain option. Ensure the component meets RoHS compliance standards required for your manufacturing process. Cross-reference the datasheet revision history to confirm no recent design changes affect pinout or electrical characteristics.

Selection Notes

Select this part when a fixed 200 V/V gain is optimal for the target shunt resistor value and expected current range. The high common-mode voltage capability makes it suitable for systems operating above standard rail voltages. Consider the 850 kHz bandwidth sufficient for the required signal frequency and transient response needs. Evaluate the 370 µA quiescent current against total system power budget constraints.

Part Context

This component 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 accommodate various sensing requirements. All variants share the same wide common-mode voltage range and high-speed performance characteristics while differing primarily in their internal fixed gain settings.

Replacement Considerations

Other members of the INA280 family, such as INA280A1, INA280A2, INA280A3, and INA280A5, are pin-compatible alternatives offering different fixed gains. Verify that the alternative gain factor aligns with the system's dynamic range and ADC input requirements before substitution.