INA214BQDCKRTL

Overview

The INA214BQDCKRTL is a voltage-output, high or low side measurement, bi-directional zero-drift series current shunt monitor manufactured by Texas Instruments. It belongs to the INA214 family and features a gain of 100 V/V. Key electrical parameters include a gain-bandwidth product of 30 kHz, a common-mode voltage (Vcm) of 12 V, and a common-mode rejection ratio (CMRR) of 140 dB. The input bias current (Ib) is 28 uA, while the input offset voltage (Vos) is 1 uV. It operates on a power supply ranging from 2.7 V to 26 V with a typical operating supply current of 100 uA. The gain error is specified at 0.02%. The device supports an operating temperature range from -40 C to +125 C and is housed in an SC-70-6 package.

Feature Summary

• Bi-directional zero-drift architecture for precise current monitoring
• Supports both high-side and low-side measurements
• High common-mode rejection ratio for noise immunity
• Low power consumption suitable for battery-operated systems

Applications

• Battery management systems
• Overcurrent protection circuits
• Load switch control
• Power delivery monitoring

Procurement Notes

Verify the specific suffix 'BQ' indicates automotive qualification (AEC-Q100) as per official datasheets. Confirm the 'RTL' suffix denotes reel packaging. Ensure the SC-70-6 package matches your PCB footprint requirements. Check for moisture sensitivity levels if storage conditions are critical. Validate the 12 V common-mode voltage limit against your system's maximum bus voltage.

Selection Notes

Select this component when high precision and low drift are required over a wide temperature range. The 100 V/V fixed gain simplifies design by eliminating external resistor matching. Consider the 1 uV offset voltage for applications requiring accurate measurement of small voltage drops across shunts. The low 100 uA supply current makes it ideal for energy-efficient designs compared to standard op-amp based solutions.

Part Context

The INA214BQDCKRTL is part of the INA214 series of current shunt monitors. This series is designed for applications requiring high accuracy and stability. The 'BQ' variant typically signifies automotive-grade reliability, adhering to AEC-Q100 standards. It serves as a robust solution for monitoring current in demanding environments where temperature stability and long-term drift are critical performance factors.

Replacement Considerations

Check for direct pin-to-pin replacements within the INA214 family such as INA214IDCKT or INA214AIRSWT, ensuring gain and package compatibility. Verify if non-automotive grades meet the thermal and reliability requirements of the application. Compare CMRR and Vos specifications to ensure equivalent performance in noisy environments.