INA214BQDCKRQ1

Overview

The INA214BQDCKRQ1 is a unidirectional current shunt monitor from Texas Instruments, designed for high-precision applications. It features a fixed gain of 50 V/V and operates with a supply voltage range of 2.7 V to 26 V. The device supports bidirectional input signals while providing a unidirectional output. Key electrical specifications include a maximum input bias current of 35 uA, an input offset voltage of 5 uV, and a gain error of 0.5%. It offers a common-mode voltage range of -100 mV to 26 V and a CMRR of 120 dB. The component functions within a temperature range of -40°C to +125°C and is housed in a SC-70-6 package.

Feature Summary

• Zero-drift architecture ensures low offset voltage and drift for accurate measurements across wide temperature ranges.
• Supports both high-side and low-side current sensing configurations with a single power supply.
• Provides a rail-to-rail analog output proportional to the sensed current.
• Automotive-grade qualification compliant with AEC-Q100 standards.

Applications

• Automotive battery management systems
• Industrial motor control circuits
• Power distribution units

Procurement Notes

Verify the specific suffix 'BQ' indicates the automotive grade (AEC-Q100) and the 'DCK' package type (SC-70-6). Confirm the gain setting matches the application requirements, as this variant has a fixed gain of 50 V/V. Ensure the ordering part number aligns exactly with the required temperature rating and packaging format before finalizing procurement.

Selection Notes

Select this component when automotive reliability is required alongside precise current monitoring. The fixed 50 V/V gain suits applications where moderate amplification is sufficient without external resistors. Consider the SC-70-6 package size for space-constrained designs. Verify that the unidirectional output capability meets the system's signal processing needs.

Part Context

This device belongs to the INA21x series of zero-drift current shunt monitors. It shares architectural similarities with other members like the INA214 but differs in gain settings and automotive qualification. The family is characterized by low power consumption and high common-mode rejection ratios suitable for sensitive measurement environments.

Replacement Considerations

Direct substitutes within the same family include the INA214IDCKRQ1 or INA214AQDCKRQ1, provided the gain and package match. Non-family replacements require careful evaluation of gain accuracy, bandwidth, and package compatibility.