Texas Instruments INA190A4QDDFRQ1

Overview

INA190A4QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier optimized for bidirectional, ultra-precise shunt-based current monitoring in 12-V battery-connected systems. It delivers 200 V/V fixed gain, ±15 µV max offset voltage, 132 dB min CMRR, and operates from 1.7 V to 5.5 V supply across –40°C to +125°C - enabling microamp-level accuracy in BMS and telematics control units.

For engineers reviewing the INA190A4QDDFRQ1 datasheet, INA190A4QDDFRQ1 pinout, INA190A4QDDFRQ1 application, or INA190A4QDDFRQ1 equivalent, key selection criteria include its picoamp input bias current (500 pA typ), 100 nA max shutdown current, 200 V/V gain accuracy (±0.3% max), bidirectional sensing via REF pin, and DDF 8-pin SOT-23 package with ENABLE functionality.

Technical Context

The INA190A4QDDFRQ1 employs a capacitively coupled front-end architecture to achieve high common-mode rejection (132 dB min) independent of supply voltage, supporting common-mode voltages from –0.2 V to +40 V - including survivability up to 42 V. Its zero-drift topology enables stable offset performance (80 nV/°C max drift) and extends dynamic range for low-value shunt resistors.

Functional safety support is integrated via documented design resources, and the ENABLE pin (DDF package only) controls device state: when driven to VS, it enables normal operation with 65 µA max quiescent current; when pulled to GND, output enters high-impedance mode and supply current drops to ≤100 nA.

Key Specifications

Pinout & Package

The INA190A4QDDFRQ1 is packaged in an 8-pin thin SOT-23 (DDF) with 1.60 mm × 2.90 mm body size and thermal metrics R_θJA = 164.6°C/W. The ENABLE pin is exclusive to this package variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A4QDRQ1 and MAX40056ATA+T, the INA190A4QDDFRQ1 uniquely combines AEC-Q100 qualification, ENABLE-controlled ultra-low shutdown current (≤100 nA), and picoamp input bias for microamp sensing - making it optimal for automotive battery monitoring and always-on telematics subsystems.

Availability

INA190A4QDDFRQ1 is available at Aetrix Electronics and suitable for battery management systems, telematics control units, and emergency call (eCall) modules requiring stable component supply across automotive production lifecycles.

Supply support for INA190A4QDDFRQ1 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs for automotive, industrial, and personal electronics markets.

The INA190-Q1 product line is designed specifically for high-accuracy, low-power current sensing in automotive 12-V battery systems - emphasizing picoamp bias current, AEC-Q100 qualification, and ENABLE functionality for energy-constrained applications.

FAQ

What is the maximum common-mode voltage the INA190A4QDDFRQ1 can withstand?

The INA190A4QDDFRQ1 supports a continuous common-mode input range of –0.2 V to +40 V and has an absolute maximum rating of 42 V on IN+ and IN– pins. This allows safe operation in high-side configurations connected directly to automotive 12-V or 24-V battery rails with transient spikes, without requiring external clamping diodes or level-shifting circuitry.

Does the INA190A4QDDFRQ1 support bidirectional current sensing, and how is it implemented?

Yes, the INA190A4QDDFRQ1 supports bidirectional current sensing via its REF pin. Applying a mid-supply voltage (e.g., VS/2) to REF sets the zero-current output level; positive differential input produces OUT > VREF (indicating one direction), while negative differential input produces OUT < VREF (indicating reverse flow). This enables charge/discharge monitoring in battery management systems using a single device.

What is the purpose of the ENABLE pin on the INA190A4QDDFRQ1, and what happens when it is grounded?

The ENABLE pin on the INA190A4QDDFRQ1 controls device activation. When driven to VS, the amplifier operates normally with ≤65 µA quiescent current. When pulled to GND, the device enters shutdown mode: output transitions to high-impedance state, and total supply current drops to ≤100 nA - critical for minimizing standby power in always-on automotive subsystems like eCall or telematics.

How does the 200 V/V gain option of the INA190A4QDDFRQ1 affect system-level current resolution?

The 200 V/V gain of the INA190A4QDDFRQ1 scales a 1-mV shunt voltage to 200 mV at the output. With ±15 µV offset and 16-bit ADC (150 µV LSB at 10-V range), this enables resolution of ~5 µA through a 100-mΩ shunt - sufficient for detecting leakage currents and low-load states in BCM and BMS applications without increasing shunt power loss.

Is the INA190A4QDDFRQ1 pin-compatible with other devices in the INA190-Q1 family?

Yes, all INA190-Q1 variants - including INA190A1QDDFRQ1 through INA190A5QDDFRQ1 - share identical 8-pin DDF (SOT-23) packaging and pinout. Gain is factory-set and non-configurable, so swapping between A1–A5 devices requires only firmware gain-scaling updates; no PCB redesign or layout change is needed.