INA211CIRSWR

Overview

The INA211CIRSWR is a single-channel, high-side current sense amplifier manufactured by Texas Instruments. It features a fixed gain of 50 V/V and operates with a supply voltage range of 2.7 V to 26 V. The device supports bidirectional sensing with a common-mode voltage range extending from -0.3 V to 26 V. Key electrical specifications include a maximum input bias current of 35 nA, an input offset voltage of 100 µV, and a gain error of 1%. It functions within a temperature range of -40°C to +85°C and is housed in a 6-pin SC-70 package.

Feature Summary

• Fixed internal gain of 50 V/V eliminates the need for external precision resistors
• Bidirectional operation allows detection of both positive and negative current flow
• High common-mode voltage capability up to 26 V enables flexible system integration

Applications

• Battery management systems
• Overcurrent protection circuits
• Load switching applications

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature grade (-40°C to +85°C) rather than industrial or automotive ratings. Confirm the 'IRSWR' suffix corresponds to the SC-70-6 tape and reel packaging format. Ensure compatibility with the required 2.7 V to 26 V supply rails before finalizing procurement orders.

Selection Notes

Select this component when a fixed 50 V/V gain is sufficient for the target current range. It is suitable for applications requiring a compact SC-70 footprint. Consider alternative models if higher bandwidth or lower offset voltage is required, as this device prioritizes low cost and simplicity over ultra-high precision metrics.

Part Context

This part belongs to the INA21x family of zero-drift current sense amplifiers. These devices are designed to monitor voltage drops across shunt resistors while rejecting high common-mode voltages. The family offers various gain options and channel counts to suit different power monitoring requirements.

Replacement Considerations

The INA211AIDCKR is a pin-compatible alternative offering improved accuracy with a lower input offset voltage of 5 µV compared to the 100 µV found in the standard INA211.