Texas Instruments INA212CQDCKRQ1

Overview

INA212CQDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-shunt monitor optimized for bidirectional, high-precision low-side or high-side sensing. It features 1000 V/V fixed gain, ±100 µV max offset voltage, 0.5 µV/°C max offset drift, and operates from 2.7 V to 26 V supply across –40°C to +125°C - enabling 10-mV full-scale shunt measurements in motor control and electronic stability control systems.

For engineers reviewing the INA212CQDCKRQ1 datasheet, INA212CQDCKRQ1 pinout, INA212CQDCKRQ1 application, or INA212CQDCKRQ1 equivalent, key selection criteria include its 1000 V/V gain accuracy (±0.5% max over temperature), 4 kHz bandwidth, SC70-6 package footprint, and functional safety documentation support for ISO 26262 ASIL-B–capable designs.

Technical Context

The INA212CQDCKRQ1 implements a zero-drift chopper-stabilized amplifier architecture with matched internal resistors (R3 = R4 = 1 kΩ) to achieve ±100 µV max input offset and 0.5 µV/°C max drift. Its differential input stage supports common-mode voltages from –0.1 V to 26 V independent of supply, enabling direct sensing on 12-V or 24-V automotive rails.

It delivers 1000 V/V gain with ±0.5% max gain error over temperature and 10 ppm/°C max gain drift. The output swings within 50 mV of V+ and 5 mV of GND at 10-kΩ load, and features 25 nV/√Hz input-referred noise and 140 dB CMRR at DC - critical for rejecting battery rail noise in valve control and wireless charging transmitters.

Key Specifications

Pinout & Package

INA212CQDCKRQ1 is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm, 0.65-mm pitch), optimized for space-constrained automotive PCBs and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense amplifier applications.

Compared with INA212CQDCKRQ1, the INA213CQDCKRQ1 offers wider dynamic range at lower gain while maintaining identical automotive qualification and SC70-6 packaging; the MAX40016ATEA+T provides higher speed and bipolar capability but requires full requalification for automotive use.

Availability

INA212CQDCKRQ1 is available at Aetrix Electronics and suitable for body control module, motor control, electronic stability control, and wireless charging transmitter applications requiring stable component supply under AEC-Q100 compliance and long-term automotive lifecycle support.

Supply support for INA212CQDCKRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of automotive-grade product development and manufacturing excellence.

INA212CQDCKRQ1 belongs to the INA21x-Q1 zero-drift current-sense amplifier family, engineered specifically for high-accuracy, high-CMRR current monitoring in automotive powertrain, chassis, and body electronics.

FAQ

What is the maximum common-mode voltage supported by the INA212CQDCKRQ1?

The INA212CQDCKRQ1 supports a common-mode input voltage range of –0.1 V to 26 V across its full operating temperature range of –40°C to +125°C. This allows direct sensing on 12-V and 24-V automotive battery rails without external level-shifting circuitry. The device maintains specified performance even when V+ is as low as 2.7 V while the shunt is placed on a 26-V rail.

Does the INA212CQDCKRQ1 require external calibration for automotive applications?

No, the INA212CQDCKRQ1 does not require external calibration for most automotive applications. Its zero-drift architecture ensures ±100 µV maximum input offset voltage and ±0.5% maximum gain error over temperature, meeting typical BCM and ESC accuracy requirements out-of-the-box. TI provides production-tested specifications - no per-unit trimming is needed for 10-mV shunt-based designs.

Can the INA212CQDCKRQ1 be used in both high-side and low-side current sensing configurations?

Yes, the INA212CQDCKRQ1 supports both high-side and low-side current sensing. Its wide –0.1 V to 26 V common-mode range enables connection across shunts on either side of the load. In low-side configuration, IN– connects to ground and IN+ to shunt; in high-side, IN+ connects to supply and IN– to load - both preserve full accuracy and bandwidth.

What is the purpose of the REF pin on the INA212CQDCKRQ1?

The REF pin on the INA212CQDCKRQ1 sets the output common-mode voltage level. When grounded, it configures the device for single-ended output referenced to GND. When tied to a mid-supply voltage (e.g., V+/2), it enables rail-to-rail output swing relative to that reference - useful for differential ADC interfaces. External impedance on REF affects CMRR, so buffering is recommended for resistive dividers.

Is functional safety documentation available for the INA212CQDCKRQ1?

Yes, functional safety documentation is available for the INA212CQDCKRQ1. Texas Instruments provides FIT rate data, failure mode effect analysis (FMEA), and diagnostic coverage reports aligned with ISO 26262 ASIL-B requirements. These materials support safety case development for automotive ECUs - no additional third-party certification is required for integration into ASIL-B systems.