INA212BIDCKT

Overview

The INA212BIDCKT is a zero-drift current sense amplifier manufactured by Texas Instruments, designed for high-precision bidirectional current monitoring in low-voltage applications. It features a fixed gain of 50 V/V and operates within a supply voltage range of 2.7 V to 26 V. Key electrical specifications include an input offset voltage of 0.5 µV, an input bias current of 28 µA, and a common-mode rejection ratio of 140 dB. The device supports a maximum common-mode voltage of 12 V and functions reliably across an extended temperature range from -40°C to +125°C. Packaged in a compact SC-70-6 surface-mount case, it draws a typical operating supply current of 65 µA.

Feature Summary

• Zero-drift architecture ensures minimal offset voltage drift over temperature variations
• Bidirectional sensing capability allows accurate measurement of current flow in both directions
• High common-mode rejection ratio maintains signal integrity under varying common-mode conditions

Applications

• Battery management systems requiring precise cell-level current monitoring
• Portable electronic devices with strict power consumption constraints
• Industrial process control loops needing stable low-side or high-side current detection

Procurement Notes

Verify the specific suffix 'CKT' against the manufacturer's official documentation to confirm the exact reel quantity and tape-and-reel specifications. Ensure that the ordering part number matches the required package variant and temperature grade. Cross-reference the datasheet revision history to confirm compatibility with your design requirements before finalizing procurement orders.

Selection Notes

Select this component when application requirements demand ultra-low offset voltage stability without the complexity of external trimming. The fixed 50 V/V gain simplifies circuit design compared to programmable gain alternatives. Consider the SC-70-6 package size if board space is limited. Verify that the 12 V common-mode voltage limit aligns with the system's shunt placement and potential fault conditions.

Part Context

This device belongs to the INA21x family of zero-drift current sense amplifiers from Texas Instruments. The series is characterized by chopper stabilization techniques to minimize offset errors. While other members like the INA210 or INA214 offer different fixed gains such as 200 V/V or 100 V/V, the INA212 provides a balanced 50 V/V gain option suitable for moderate sensitivity applications within the same compact footprint and power envelope.

Replacement Considerations

Direct functional substitutes within the same family include the INA210BIDCKT (Gain 200 V/V) and INA214BIDCKT (Gain 100 V/V). These parts share identical pinouts, packages, and electrical characteristics except for the internal fixed gain. Designers must adjust external resistor networks or software scaling factors if substituting with these variants.