INA211CIRSWT

Overview

The INA211CIRSWT is a bi-directional, zero-drift current shunt monitor manufactured by Texas Instruments. It operates within a supply voltage range of 2.7 V to 26 V and features a fixed gain of 500 V/V. Key electrical parameters include an input offset voltage of 550 nV, a common-mode rejection ratio of 140 dB, and a gain-bandwidth product of 7 kHz. The device draws 100 uA of operating supply current and supports a maximum common-mode voltage of 26 V. It is housed in a 10-pin UQFN package and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Bi-directional measurement capability for low-side and high-side current sensing applications
• Zero-drift architecture ensures high precision with minimal offset voltage drift over temperature
• High common-mode rejection ratio maintains accuracy in noisy environments

Applications

• Industrial process control systems requiring precise current monitoring
• Battery management systems for charge and discharge tracking
• Overcurrent protection circuits in power distribution units

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature grade (-40°C to +85°C) or industrial grade depending on the official datasheet revision, as lifecycle status may vary. Confirm the 'SWT' suffix denotes the 10-pin UQFN tape and reel packaging format. Ensure compatibility with existing PCB footprints for the UQFN-10 package. Check for end-of-life notifications from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when a fixed high gain of 500 V/V is required to amplify small shunt voltages directly to usable levels. The zero-drift technology is essential for applications demanding long-term stability without frequent calibration. Compare against the INA210 and INA214 if different gain factors (200 V/V or 100 V/V) are needed for the same application constraints.

Part Context

This part belongs to the INA21x family of voltage-output current sense amplifiers. It shares architectural similarities with the INA210 and INA214 but offers a distinct fixed gain of 500 V/V. The family is characterized by bi-directional operation and zero-drift performance, designed for high-precision measurements in space-constrained designs using the UQFN package.

Replacement Considerations

Direct substitutes within the same family include the INA210AIRSWT (Gain 200 V/V) and INA214AIRSWT (Gain 100 V/V). These parts share identical pinouts, packages, and core specifications, differing only in internal gain settings. Verify that the system design can accommodate the output voltage swing differences resulting from the gain change.