INA211AIDCKT

Overview

The INA211AIDCKT is a single-channel, bidirectional current-shunt monitor from Texas Instruments featuring a zero-drift architecture. It provides a voltage output proportional to the shunt voltage drop, supporting both low-side and high-side measurements with a common-mode voltage range of -0.3V to 26V. The device operates on a single supply voltage between 2.7V and 26V, consuming a maximum of 65µA. Key electrical characteristics include a gain of 50 V/V, an input offset voltage of 550nV, and a gain error of 0.5%. It functions reliably across an extended temperature range of -40°C to +125°C and is housed in a compact SC-70-6 surface-mount package.

Feature Summary

• Zero-drift architecture ensures low input offset voltage for accurate sensing of small shunt voltage drops.
• Bidirectional operation allows detection of current flow in both directions relative to ground.
• Supports high-side and low-side measurement configurations within a wide common-mode voltage range.

Applications

• Battery management systems requiring precise current monitoring
• Overcurrent protection circuits in industrial equipment
• Current limiting control in power distribution units

Procurement Notes

Verify the specific suffix 'CKT' corresponds to the SC-70-6 tape-and-reel packaging configuration as defined by Texas Instruments documentation. Confirm that the 'A' grade designation meets the required offset voltage and gain accuracy specifications for the target application. Ensure compatibility with the intended operating temperature range and supply voltage constraints before finalizing procurement orders.

Selection Notes

Select this component when high precision is required for bidirectional current sensing without external calibration. The zero-drift technology minimizes offset errors over temperature, making it suitable for applications using low-value shunt resistors. Consider the 50 V/V fixed gain and SC-70-6 package size when designing for space-constrained boards requiring high accuracy in battery or power rail monitoring.

Part Context

The INA211 belongs to the INA21x family of voltage-output, bidirectional, zero-drift current-shunt monitors. This series is designed to replace traditional operational amplifier solutions by integrating precision amplification and signal conditioning into a single, compact package. The family offers various gain options and packages to accommodate different board space and accuracy requirements in modern electronic systems.

Replacement Considerations

Direct functional substitutes within the same family include the INA212AIDCKT (Gain 100), INA213AIDCKT (Gain 200), and INA214AIDCKT (Gain 500). These parts share identical pinouts and packaging but differ in internal gain settings. Verify that the alternative gain factor aligns with the expected shunt voltage range and ADC input limits of the system design.