Texas Instruments INA213AQDCKRQ1

Overview

INA213AQDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-shunt monitor with zero-drift architecture, 50 V/V fixed gain, ±100 µV max offset voltage, and –0.3 V to 26 V common-mode input range. It operates from 2.7 V to 26 V supply, draws ≤100 µA quiescent current, and is packaged in a 6-pin SC70 for space-constrained body control modules and motor control systems.

For engineers reviewing the INA213AQDCKRQ1 datasheet, INA213AQDCKRQ1 pinout, INA213AQDCKRQ1 application, or INA213AQDCKRQ1 equivalent, key selection criteria include low-offset high-side/low-side bidirectional sensing capability, 80 kHz bandwidth, 100 µV offset tolerance enabling 10-mV full-scale shunt operation, and functional safety documentation support for ASIL-B–aligned designs.

Technical Context

The INA213AQDCKRQ1 implements a zero-drift chopper-stabilized amplifier topology to achieve ±100 µV max input offset and 0.5 µV/°C max drift over –40°C to +125°C. Its differential input stage supports bidirectional current measurement across shunts at common-mode voltages up to 26 V - independent of its 2.7–26 V supply rail.

With a fixed 50 V/V gain, it delivers voltage output referenced to an externally applied REF pin (0 V to V+), enabling flexible level-shifting for ADC interfacing. Input bias current is ≤35 µA at 25°C, and CMRR reaches 100 dB (min) at DC, supporting accurate sensing in noisy automotive power domains.

Key Specifications

Pinout & Package

INA213AQDCKRQ1 is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for high-density automotive PCB layouts and thermal performance (R_θJA = 227.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA213AIDCKR and MAX40056ATA+T, the INA213AQDCKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 26-V common-mode operation, REF-pin flexibility, and functional safety support - making it the only option qualified for ASIL-B–aligned automotive current monitoring.

Availability

INA213AQDCKRQ1 is available at Aetrix Electronics and suitable for body control modules, valve control systems, and motor control applications requiring stable component supply across automotive production lifecycles.

Supply support for INA213AQDCKRQ1 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, embedded processing, and automotive ICs, with decades of expertise in high-reliability signal conditioning and power management solutions.

The INA21x-Q1 product line was designed specifically for automotive current sensing - delivering AEC-Q100–qualified, zero-drift amplifiers with extended common-mode range and functional safety support for next-generation ECU architectures.

FAQ

What is the maximum common-mode voltage supported by the INA213AQDCKRQ1?

The INA213AQDCKRQ1 supports a common-mode input voltage range of –0.3 V to 26 V, independent of its supply voltage. This allows direct high-side sensing on 12-V and 24-V automotive battery rails, even when powered from a lower 3.3-V or 5-V domain. The device maintains specified accuracy across this full range at temperatures from –40°C to +125°C.

Does the INA213AQDCKRQ1 require external calibration for offset error?

No - the INA213AQDCKRQ1 uses a zero-drift chopper architecture that guarantees ≤±100 µV maximum input offset voltage over temperature, eliminating the need for system-level offset calibration. Its 0.5 µV/°C max drift ensures stable performance across automotive operating conditions, reducing firmware complexity and test time in production ECUs.

Can the INA213AQDCKRQ1 be used for bidirectional current measurement?

Yes - the INA213AQDCKRQ1 supports true bidirectional sensing. When the shunt voltage polarity reverses (e.g., during motor regeneration), the output voltage swings below the REF pin voltage. With REF tied to mid-supply (e.g., 2.5 V on a 5-V rail), the output ranges from ~2.0 V (negative current) to ~3.0 V (positive current), enabling full-directional current monitoring in H-bridge and inverter applications.

What is the purpose of the REF pin on the INA213AQDCKRQ1?

The REF pin on the INA213AQDCKRQ1 sets the output voltage's common-mode level. It accepts any DC voltage from 0 V to V+, allowing flexible interfacing - e.g., tying REF to GND yields ground-referenced output, while connecting it to an ADC reference creates ratiometric operation. This eliminates level-shifting circuitry and improves noise immunity in mixed-signal automotive systems.

Is functional safety documentation available for the INA213AQDCKRQ1?

Yes - Texas Instruments provides functional safety documentation for the INA213AQDCKRQ1, including FMEDA reports, FIT rate data, and diagnostic coverage analysis. These resources are intended to aid ISO 26262 ASIL-B hardware development, enabling integration into safety-critical automotive subsystems such as electronic stability control and brake-by-wire without requiring external safety monitors.