INA280A1IDCKR

Overview

The INA280A1IDCKR is a high-precision, unidirectional 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 single supply voltage between 2.7 V and 20 V. The device provides a fixed gain of 20 V/V with a typical DC CMRR of 140 dB and a maximum gain error of ±0.5%. It offers a bandwidth of 1.1 MHz at the specified gain and draws a quiescent current of 370 µA. Packaged in a space-efficient SC-70 (DCK) footprint, it supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Supports high-side current sensing with a wide common-mode input range up to 120 V.
• Delivers high precision through low offset voltage and minimal gain drift across extended temperatures.
• Provides fast response capabilities suitable for rapid overcurrent detection and protection.
• Utilizes a compact SC-70 package to minimize PCB area requirements.

Applications

• Active antenna system mMIMO
• Macro remote radio unit power supplies
• 48-V rack server power distribution
• 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 that the A1 designation matches the required 20 V/V gain configuration for your circuit design. Ensure the component meets RoHS compliance standards if required by your manufacturing process. Cross-reference the datasheet revision history for any updates regarding electrical characteristics or pin configurations before finalizing procurement.

Selection Notes

Select this part when high-side sensing is required with common-mode voltages exceeding standard operational limits. The fixed 20 V/V gain is optimal for applications requiring higher output swing relative to small shunt voltages. Consider the 1.1 MHz bandwidth for systems needing fast transient response. Evaluate the 370 µA quiescent current against total system power budgets. Verify that the SC-70 package size fits within the available board real estate constraints.

Part Context

This component belongs to the INA280 family of high-voltage current-sense amplifiers. It is designed specifically for high-side monitoring in industrial and telecommunications infrastructure. The device integrates precision internal resistors to set the gain, eliminating the need for external components. It serves as a bridge between high-voltage power rails and low-voltage analog-to-digital converters or microcontrollers.

Replacement Considerations

Other variants within the INA280 series offer different fixed gains (50 V/V, 100 V/V, 200 V/V, 500 V/V). If a different gain is needed, select the corresponding A2, A3, A4, or A5 suffix while maintaining the IDCKR package code. Ensure the replacement maintains the same unidirectional operation mode and supply voltage compatibility.