INA212CIDCKR

Overview

The INA212CIDCKR is a single-channel, bidirectional current sense amplifier from Texas Instruments' Zero-Drift series. It operates on a single supply voltage ranging from 2.7 V to 26 V and features a fixed gain of 50 V/V. The device utilizes an auto-zero architecture to achieve low input offset voltage and minimal drift over temperature. It supports common-mode voltages from -0.3 V to 26 V, independent of the supply voltage. Key electrical parameters include a maximum supply current of 100 µA, a gain bandwidth product of 14 kHz, and an input bias current of 28 µA. It is housed in a SC-70-6 package and rated for operation between -40°C and +125°C.

Feature Summary

• Zero-drift architecture ensures high precision with low offset voltage and minimal drift across temperature variations.
• Bidirectional sensing capability allows detection of current flow in both directions relative to ground.
• Wide common-mode voltage range supports monitoring across shunt resistors at various potential levels.

Applications

• Battery management systems requiring precise current monitoring
• Industrial process control loops
• Power supply output current limiting

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature grade (-40°C to +85°C) rather than the industrial grade ('I') when reviewing official datasheets, as this affects operating limits. Confirm the 'DCKR' suffix corresponds to the SC-70-6 package and tape-and-reel quantity. Ensure compatibility with system voltage rails within the 2.7 V to 26 V specification.

Selection Notes

Select this component when high DC accuracy is required without external trimming. The Zero-Drift technology eliminates the need for chopper stabilization artifacts often found in other precision amplifiers. Compare against the INA212BIDCKR if automotive qualification or extended temperature ranges are not required. Consider the fixed gain of 50 V/V to ensure the output swing matches the ADC input range of the microcontroller.

Part Context

This part belongs to the INA21x family of bidirectional current shunt monitors. These devices are designed for low-side and high-side current sensing applications where precision and low power consumption are critical. The family offers various gain options and packages to suit different board space and sensitivity requirements.

Replacement Considerations

INA212BIDCKR: Similar performance but may differ in temperature grade or automotive qualification status.

FAQ

What is the fixed gain of the INA212CIDCKR?

The INA212CIDCKR has a fixed internal gain of 50 V/V.

Does the INA212CIDCKR support negative common-mode voltages?

Yes, it can sense common-mode voltages down to -0.3 V.