Texas Instruments INA240A1EDRQ1

Overview

INA240A1EDRQ1 from Texas Instruments is an AEC-Q100 Grade 0 automotive current-sense amplifier with 20 V/V fixed gain, –4 V to 80 V wide common-mode input range, ±25 µV max offset voltage, 132-dB DC CMRR, and enhanced PWM rejection for accurate bidirectional current measurement in solenoid control and motor drive circuits.

For engineers reviewing the INA240A1EDRQ1 datasheet, INA240A1EDRQ1 pinout, INA240A1EDRQ1 application, or INA240A1EDRQ1 equivalent, this device supports high-accuracy shunt-based sensing in high-dV/dt environments-especially where flyback voltages dip below ground or PWM transients exceed 50 kHz-without output recovery ripple or measurement corruption.

Technical Context

The INA240A1EDRQ1 implements a zero-drift, voltage-output architecture optimized for bidirectional current sensing across shunt resistors, with internal topology that suppresses large ΔV/Δt common-mode transients before amplification. Its differential input stage maintains 93-dB AC CMRR at 50 kHz and operates from a single 2.7–5.5 V supply drawing ≤2.4 mA.

Unlike standard current-sense amplifiers, it features dual reference inputs (REF1/REF2) enabling programmable output midpoint for unidirectional or bidirectional operation, and its negative common-mode capability (down to –4 V) accommodates inductive flyback in solenoid and actuator applications without external level-shifting circuitry.

Key Specifications

Pinout & Package

INA240A1EDRQ1 is packaged in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, rated for –40°C to +150°C ambient operation per AEC-Q100 Grade 0.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A2EDRQ1, the INA240A1EDRQ1 provides higher full-scale shunt voltage tolerance (150 mV), simplifying low-current sensing; compared with INA188A1IDR, it delivers certified automotive reliability, superior transient rejection, and extended temperature operation-making it the sole qualified option for EPS and traction control.

Availability

INA240A1EDRQ1 is available at Aetrix Electronics and suitable for electronic power steering, stability control systems, and solenoid valve control requiring stable component supply across automotive production lifecycles.

Supply support for INA240A1EDRQ1 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 deep expertise in automotive-grade signal conditioning and power management ICs.

The INA240-Q1 product line was designed specifically for high-reliability, high-noise automotive current sensing-targeting EPS, brake-by-wire, and transmission control units where precision, AEC-Q100 compliance, and PWM robustness are mandatory.

FAQ

What is the maximum common-mode voltage the INA240A1EDRQ1 can handle?

The INA240A1EDRQ1 supports a common-mode input voltage range of –4 V to +80 V. This allows it to accurately sense current during inductive flyback events where the shunt voltage dips below ground (e.g., solenoid de-energization), and also operate in 48-V automotive systems or battery-monitoring applications up to 80 V. The specification is guaranteed over the full –40°C to +150°C operating temperature range for the INA240A1EDRQ1.

Does the INA240A1EDRQ1 require external calibration for offset or gain error?

No, the INA240A1EDRQ1 does not require external calibration. Its zero-drift architecture ensures ±25 µV maximum input-referred offset voltage and ±0.20% maximum gain error over temperature, with drift coefficients of ±250 nV/°C and ±2.5 ppm/°C respectively. These factory-trimmed specifications are guaranteed across the full –40°C to +150°C range, enabling plug-and-play accuracy in production automotive modules.

How does the enhanced PWM rejection in the INA240A1EDRQ1 improve system performance?

The enhanced PWM rejection in the INA240A1EDRQ1 suppresses large common-mode transients (ΔV/Δt) associated with motor and solenoid PWM switching-achieving 93-dB AC CMRR at 50 kHz. This eliminates output recovery ripple and transient artifacts that would otherwise corrupt current measurements, enabling accurate real-time torque estimation and overcurrent protection without additional RC filtering or layout constraints.

Can the INA240A1EDRQ1 be used for bidirectional current sensing?

Yes, the INA240A1EDRQ1 supports bidirectional current sensing via its dual reference inputs (REF1 and REF2). By setting REF1 = REF2 = VS/2, the output centers at VS/2 for zero current, producing a symmetric ±1.5 V output swing around mid-supply for a 150-mV full-scale shunt drop. This configuration is widely used in H-bridge motor control and regenerative braking systems.

What package and thermal characteristics apply to the INA240A1EDRQ1?

The INA240A1EDRQ1 is supplied in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, with a junction-to-ambient thermal resistance (RθJA) of 113.5°C/W. It is rated for –40°C to +150°C ambient operation (AEC-Q100 Grade 0), and its thermal design supports direct mounting on standard FR-4 PCBs with standard copper pour-no heatsink required for typical 2.4-mA quiescent power dissipation.