INA211BIRSWR

Overview

The INA211BIRSWR is a precision current sense amplifier manufactured by Texas Instruments, featuring a fixed gain of 50 V/V. It operates within a supply voltage range of 2.7 V to 36 V and supports bidirectional sensing with a common-mode voltage range extending from -0.1 V to +26 V. The device incorporates a low offset voltage of 15 µV and a high common-mode rejection ratio of 80 dB. Designed for surface-mount installation, it utilizes a UQFN-10 package and functions reliably across an industrial temperature range of -40°C to +125°C.

Feature Summary

• Provides precise bidirectional current monitoring through integrated signal conditioning.
• Maintains high accuracy with minimal input offset voltage and drift characteristics.
• Supports wide common-mode voltage ranges suitable for both high-side and low-side configurations.

Applications

• Industrial process control systems requiring accurate current feedback
• Power management units in portable equipment
• Overcurrent protection circuits in battery-powered devices

Procurement Notes

Verify the specific suffix 'B' indicates the appropriate gain tolerance class for your design requirements. Confirm that the UQFN-10 thermal pad connection meets your PCB layout specifications for optimal heat dissipation. Ensure the selected component version aligns with your target operating temperature range and supply voltage constraints before finalizing procurement.

Selection Notes

Select this component when a fixed gain of 50 V/V is required for direct interfacing with analog-to-digital converters. Consider its wide common-mode voltage capability if the sensing resistor is placed on the high side of the load. Evaluate the trade-off between its low power consumption and the necessary bandwidth for your specific signal frequency requirements.

Part Context

This part belongs to the INA211 family of current sense amplifiers, which are designed for cost-effective and space-constrained applications. The series offers various gain options and package types to accommodate different system architectures. The INA211B variant specifically ensures tighter gain accuracy compared to standard versions, making it suitable for applications demanding higher measurement precision without external calibration.

Replacement Considerations

Direct substitutes include other parts within the INA211 family such as INA211A or INA211C, depending on the required gain accuracy. Alternative packages like SOIC-8 may be considered if pin compatibility allows. Verify that any replacement maintains the same gain value and common-mode voltage range to ensure circuit functionality remains unchanged.