INA211BQDCKRQ1

Overview

The INA211BQDCKRQ1 is a single-channel, bidirectional, zero-drift current shunt monitor manufactured by Texas Instruments. It operates on a single supply voltage ranging from +2.7V to +26V and supports common-mode voltages from -0.3V to 26V. The device features a fixed gain of 20 V/V with a gain error of 0.5%. Key electrical parameters include a maximum input bias current of 28 µA, an input offset voltage of 0.55 µV, and a power supply current of up to 65 µA. It provides a voltage output proportional to the shunt voltage drop.

Feature Summary

• Zero-drift architecture ensures low input offset voltage for high-precision measurements across the operating temperature range.
• Capable of sensing negative common-mode voltages down to -0.3V while maintaining operation with positive supply voltages.
• Fixed internal gain eliminates the need for external precision resistors, simplifying circuit design.

Applications

• Automotive battery monitoring systems
• High-side current sensing in power distribution units
• Motor control and protection circuits

Procurement Notes

Verify the specific suffix 'BQDCKRQ1' against the manufacturer's official datasheet to confirm package type, temperature grade, and automotive qualification status. Ensure compatibility with the target PCB footprint for the SC-70-6 package. Cross-reference the AEC-Q100 certification requirements with the project specifications before finalizing procurement.

Selection Notes

Select this component when high accuracy is required without external calibration due to its zero-drift characteristics. It is suitable for applications requiring a wide common-mode voltage range including negative values. Consider the fixed gain of 20 V/V to ensure the output signal remains within the ADC input range given the expected maximum shunt voltage drop.

Part Context

This part belongs to the INA21x family of current sense amplifiers designed for automotive and industrial applications. The family offers various gain options and packages, all sharing the zero-drift technology for improved stability over temperature. The 'Q1' suffix indicates automotive qualification according to AEC-Q100 standards.

FAQ

What is the minimum common-mode voltage supported?

The device supports a common-mode voltage range starting from -0.3V.

Does the INA211 require external feedback resistors?

No, it has a fixed internal gain of 20 V/V, eliminating the need for external gain-setting resistors.