INA214CIDCKT

Overview

The INA214CIDCKT is a voltage-output, high or low side measurement, bi-directional zero-drift current shunt monitor manufactured by Texas Instruments. It operates on a single supply voltage ranging from 2.7 V to 26 V and consumes a maximum of 100 µA of supply current. The device features a fixed gain of 100 V/V, enabling accurate sensing of voltage drops across shunt resistors as low as 10 mV full scale. It provides a common-mode voltage range of -0.3 V to 26 V, independent of the supply voltage. Key electrical parameters include a gain bandwidth product of 30 kHz, a common-mode rejection ratio (CMRR) of 140 dB, an input bias current of 28 µA, and an input offset voltage of 1 µV. The gain error is specified at 0.02%. The component is housed in a SC-70-6 package and is rated for operation over an industrial temperature range of -40°C to +85°C.

Feature Summary

• Bi-directional zero-drift architecture ensures precise current sensing with minimal offset drift over temperature and time.
• Supports both high-side and low-side current measurements within a wide common-mode voltage range.
• Fixed internal gain eliminates the need for external precision resistors, simplifying circuit design.
• Low power consumption allows for efficient operation in battery-powered or energy-constrained applications.

Applications

• Battery management systems requiring accurate cell current monitoring
• Industrial process control loops for load cell and sensor signal conditioning
• Overcurrent protection circuits in power distribution units
• Smart metering and energy monitoring equipment

Procurement Notes

Verify the specific suffix 'CKT' corresponds to the SC-70-6 package and tape-and-reel quantity when ordering. Confirm that the 'C' designation aligns with the required industrial temperature range (-40°C to +85°C) for your application environment. Ensure compatibility with your PCB footprint for the SC-70-6 package. Cross-reference the manufacturer part number directly with official Texas Instruments documentation to avoid counterfeit components.

Selection Notes

Select this component when a fixed gain of 100 V/V is required for bidirectional current sensing. It is suitable for applications needing high common-mode rejection and low offset voltage without external calibration. Consider alternatives if higher bandwidth or automotive qualification (AEC-Q100) is strictly necessary, as this variant is specified for industrial temperatures only.

Part Context

The INA214 is part of the INA21x family of zero-drift current shunt monitors from Texas Instruments. This series offers multiple fixed gain options to accommodate different shunt resistor values and voltage ranges. The INA214 specifically provides a gain of 100 V/V, distinguishing it from other family members like the INA210 (gain 20 V/V) or INA215 (gain 75 V/V). All devices in the series share similar low-power characteristics and wide common-mode voltage capabilities.

Replacement Considerations

Direct functional substitutes within the same family include INA210CIDCKT (Gain 20 V/V), INA211CIDCKT (Gain 50 V/V), INA213CIDCKT (Gain 200 V/V), and INA215CIDCKT (Gain 75 V/V). These parts share identical pinouts and packages but differ in internal gain. Verify that the alternative gain factor meets your system's output voltage requirements before substitution.