Texas Instruments INA186A5QDBVRQ1

Overview

INA186A5QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier optimized for bidirectional 12-V battery monitoring in body control modules and telematics units. It delivers 500 V/V fixed gain, ±1% max gain error, ±50 µV max offset voltage, and operates from 1.7 V to 5.5 V supply across –40°C to +125°C ambient.

For engineers reviewing the INA186A5QDBVRQ1 datasheet, INA186A5QDBVRQ1 pinout, INA186A5QDBVRQ1 application, or INA186A5QDBVRQ1 equivalent, key selection criteria include its 500 V/V gain accuracy, 48 µA quiescent current, 120 dB minimum CMRR, picoamp input bias (500 pA typ), and SC70-6 package compatibility with high-side/low-side sensing topologies.

Technical Context

The INA186A5QDBVRQ1 implements a capacitively coupled front-end architecture enabling 40-V common-mode operation independent of 1.7–5.5-V supply voltage, with survival up to 42 V. Its zero-drift topology achieves ±50 µV offset and 0.5 µV/°C drift, supporting microamp-range current measurement via large shunt resistors.

It features rail-to-rail output swing (GND + 1 mV min, VS – 40 mV max), 27 kHz bandwidth at 500 V/V gain, and 75 nV/√Hz input-referred noise - all while maintaining functional safety documentation support and AEC-Q100 qualification for automotive systems.

Key Specifications

Pinout & Package

INA186A5QDBVRQ1 is packaged in SC70-6 (DCK) with 2.00 mm × 1.25 mm body size. This variant includes REF and ENABLE pins, supporting bidirectional sensing and power-gating functionality.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A5QDRQ1 and MAX40056ATA+T, the INA186A5QDBVRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 500 V/V gain, REF-enabled bidirectionality, and SC70-6 footprint - making it optimal for space-constrained, safety-critical 12-V automotive subsystems requiring polarity-aware current telemetry.

Availability

INA186A5QDBVRQ1 is available at Aetrix Electronics and suitable for body control modules, telematics control units, emergency call systems, and 12-V battery management systems requiring stable component supply across automotive production lifecycles.

Supply support for INA186A5QDBVRQ1 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 INA186-Q1 product line targets high-precision, low-power current sensing in automotive battery-connected systems - specifically engineered to replace discrete op-amp-based monitors with integrated AEC-Q100-compliant performance in SC70 and SOT-23 packages.

FAQ

What is the maximum common-mode voltage the INA186A5QDBVRQ1 can withstand without damage?

The INA186A5QDBVRQ1 has an absolute maximum common-mode input rating of 42 V, allowing it to survive automotive load-dump transients per ISO 7637-2. Its recommended operating common-mode range is –0.2 V to +40 V, making it ideal for direct connection to 12-V battery rails. This 42-V rating applies to both IN+ and IN− pins referenced to GND, and is validated across the full –40°C to +125°C temperature range specified for the INA186A5QDBVRQ1.

Does the INA186A5QDBVRQ1 support bidirectional current sensing, and how is it implemented?

Yes, the INA186A5QDBVRQ1 supports bidirectional current sensing through its dedicated REF pin, which accepts an externally applied reference voltage (GND ≤ VREF ≤ VS). When current flows in one direction, the output is VREF + 500×(IN+ − IN−); reverse current yields VREF − 500×|IN+ − IN−|. This configuration is enabled only in SC70-6 (DCK) and SOT-23-8 (DDF) packages - the INA186A5QDBVRQ1 uses the SC70-6 variant, confirming full bidirectional capability for applications like eCall leakage detection and BMS charge/discharge monitoring.

What is the typical quiescent current of the INA186A5QDBVRQ1, and how does it change in shutdown mode?

When enabled, the INA186A5QDBVRQ1 draws 48 µA typical quiescent current (IQ) across 1.7–5.5 V supply and –40°C to +125°C ambient. In shutdown mode - achieved by driving the ENABLE pin to GND - IQ drops to 10 nA typical. This ultra-low shutdown current enables energy-efficient duty-cycled monitoring in always-on automotive subsystems. The ENABLE pin is present in the SC70-6 package used by the INA186A5QDBVRQ1, and its 300-mV hysteresis prevents chatter during slow-rising control signals.

How does the 500 V/V gain option of the INA186A5QDBVRQ1 improve measurement resolution compared to lower-gain variants?

The 500 V/V gain of the INA186A5QDBVRQ1 amplifies minute shunt voltages - for example, a 10 mΩ resistor carrying 1 mA generates only 10 µV across it, which becomes 5 mV at the output. This directly improves effective resolution when interfaced with a 12-bit MCU ADC (e.g., 5 mV spans ~500 LSBs of a 2.5-V full-scale range). Combined with ±50 µV offset and 0.5 µV/°C drift, the INA186A5QDBVRQ1 maintains sub-10 µA current detection fidelity across temperature - a capability not achievable with 100 V/V or lower gain versions without sacrificing dynamic range or accuracy.

Is the INA186A5QDBVRQ1 pin-compatible with other members of the INA186-Q1 family, such as the INA186A1QDBVRQ1?

No, the INA186A5QDBVRQ1 is not pin-compatible with other gain variants in the INA186-Q1 family. While all SC70-6 devices share identical pinout (REF, OUT, GND, VS, IN+, IN−), the gain is laser-trimmed during manufacturing and cannot be altered post-production. However, PCB layout designed for the INA186A5QDBVRQ1 will accept any SC70-6 variant (A1–A5) without modification - enabling design reuse across different current-sensing ranges. This mechanical compatibility simplifies BOM management while preserving electrical uniqueness per application requirement.