Texas Instruments INA253A2QPWRQ1

Overview

INA253A2QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified bidirectional current sense amplifier with integrated 2 mΩ shunt resistor, 200 mV/A fixed gain, –4 V to +80 V wide common-mode range, and 350 kHz bandwidth. It delivers ±15 mA input offset current max and 0.4% system gain error for precision in-line motor and solenoid current monitoring in powertrain control units.

For engineers reviewing the INA253A2QPWRQ1 datasheet, INA253A2QPWRQ1 pinout, INA253A2QPWRQ1 application, or INA253A2QPWRQ1 equivalent, key selection criteria include PWM rejection capability, integrated shunt temperature coefficient (10 ppm/°C from 0 °C to 125 °C), quiescent current (2.4 mA max), and TSSOP-20 package compatibility with high-current PCB layouts.

Technical Context

The INA253A2QPWRQ1 integrates a Kelvin-connected 2 mΩ shunt with 3 nH inductance and 0.1% tolerance, matched to a zero-drift chopped amplifier enabling calibration-equivalent accuracy. Its enhanced PWM rejection circuitry suppresses large dv/dt transients without requiring external filtering.

It features >120 dB DC CMRR and 90 dB AC CMRR at 50 kHz, operates from 2.7 V to 5.5 V supply, and maintains ±15 A continuous sensing capability from –40 °C to +85 °C with 125 µA/°C offset drift - all specified across –40 °C to +125 °C ambient.

Key Specifications

Pinout & Package

The INA253A2QPWRQ1 is housed in a thermally enhanced 20-pin TSSOP (PW) package measuring 6.50 mm × 4.40 mm, optimized for high-current Kelvin routing and PCB heat dissipation via exposed pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA253A1QPWRQ1 and INA253A3QPWRQ1, the INA253A2QPWRQ1 provides optimal dynamic range for ±10 A applications - balancing output voltage swing, noise floor, and thermal margin without requiring gain-switching circuitry or external scaling.

Availability

INA253A2QPWRQ1 is available at Aetrix Electronics and suitable for diesel engine control, gasoline engine control, automatic transmission systems, and powertrain current sensor designs requiring stable component supply, AEC-Q100 compliance, and production-ready traceability.

Supply support for INA253A2QPWRQ1 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 delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.

The INA253-Q1 product line is designed specifically for automotive powertrain current sensing - integrating precision shunts and PWM-hardened amplifiers to replace discrete sense-resistor + op-amp solutions in engine control units and transmission control modules.

FAQ

What is the maximum continuous current rating for the INA253A2QPWRQ1?

The INA253A2QPWRQ1 supports ±15 A continuous current from –40 °C to +85 °C ambient temperature. At +125 °C ambient, derating applies - maximum continuous current reduces to ±10 A. This rating accounts for total package resistance (4.5 mΩ), self-heating, and junction temperature limits (150 °C). Layout with 2-oz copper planes and airflow extends full 15 A capability across the full –40 °C to +125 °C range.

Does the INA253A2QPWRQ1 require external calibration to achieve its 0.4% system gain accuracy?

No, the INA253A2QPWRQ1 does not require external calibration to achieve its 0.4% system gain error specification. The 2 mΩ integrated shunt resistor is factory-matched to the amplifier's gain stage, delivering calibration-equivalent accuracy. This matching covers both resistor tolerance (0.1% max) and amplifier gain error (0.4% max), eliminating the need for end-of-line trimming or software correction in most automotive applications.

How does the enhanced PWM rejection in the INA253A2QPWRQ1 improve motor control performance?

The enhanced PWM rejection in the INA253A2QPWRQ1 suppresses large dv/dt common-mode transients (e.g., from MOSFET gate drivers) before they distort the output signal. Unlike standard amplifiers relying solely on bandwidth, this feature uses dedicated circuitry to attenuate 50 kHz PWM noise by 90 dB - enabling clean real-time current waveforms for field-oriented control (FOC) and overcurrent protection without added RC filtering or digital post-processing delays.

Can the integrated shunt resistor in the INA253A2QPWRQ1 be used independently of the amplifier?

No, the integrated 2 mΩ shunt resistor in the INA253A2QPWRQ1 is not intended for standalone use. When used without the internal amplifier, its tolerance degrades to ~5% due to uncontrolled package resistance and thermal coupling effects. The device is system-calibrated with the amplifier - using the shunt alone voids the 0.1% tolerance, 10 ppm/°C tempco, and matched gain specifications stated for the INA253A2QPWRQ1.

What is the purpose of the SH+ and SH– pins on the INA253A2QPWRQ1?

The SH+ and SH– pins on the INA253A2QPWRQ1 provide Kelvin sense connections directly to the internal 2 mΩ shunt resistor. They enable accurate voltage measurement across the shunt by bypassing package resistance (4.5 mΩ total). These pins must be connected to IN+ and IN– respectively to achieve the specified 0.1% system gain accuracy - routing them elsewhere invalidates the calibrated performance of the INA253A2QPWRQ1.