Texas Instruments INA186A3IYFDR

Overview

INA186A3IYFDR from Texas Instruments is a bidirectional, zero-drift current-sense amplifier with 100 V/V fixed gain, –0.2 V to +40 V common-mode input range, ±50 µV max offset voltage, and 48 µA typical quiescent current. It enables precision microamp-level current monitoring in high-side or low-side configurations for battery-powered portable electronics.

For engineers reviewing the INA186A3IYFDR datasheet, INA186A3IYFDR pinout, INA186A3IYFDR application, or INA186A3IYFDR equivalent, key selection considerations include its DSBGA-6 (YFD) package with ENABLE pin, bidirectional sensing capability via external REF biasing, rail-to-rail output swing (GND +1 mV / VS –40 mV), and guaranteed 120 dB CMRR over –40°C to +125°C.

Technical Context

The INA186A3IYFDR uses a capacitively coupled front-end architecture to achieve high common-mode rejection (120 dB min) independent of supply voltage, enabling accurate sensing at bus voltages up to 40 V while operating from as low as 1.7 V. Its zero-drift design maintains ±0.5 µV/°C offset drift and ±1% gain error across temperature.

This variant integrates an ENABLE pin (active-high, VIH = 1.35 V min) that reduces supply current to 10 nA in shutdown and places OUT in high-impedance state-critical for intermittent monitoring in power-constrained systems. The YFD package lacks a dedicated REF pin; internal grounding enables unidirectional operation unless externally modified.

Key Specifications

Pinout & Package

The INA186A3IYFDR is housed in a 1.17 mm × 0.765 mm, 0.4-mm pitch DSBGA-6 (YFD) package with bottom-side thermal pad. This ultra-compact chip-scale package supports automated optical inspection and high-density PCB layouts in space-constrained mobile designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA2181A3IYFDR, the INA186A3IYFDR offers lower quiescent current (48 µA vs. 65 µA) and simpler REF handling for unidirectional use, while MAX40016AUB+ trades enable functionality for higher supply voltage margin and different footprint-making INA186A3IYFDR optimal for compact, battery-sensitive designs requiring programmable power gating.

Availability

INA186A3IYFDR is available at Aetrix Electronics and suitable for smartphone battery management, USB-C power delivery chargers, industrial IoT sensor nodes, and laptop system power monitors requiring stable component supply across production lifecycles.

Supply support for INA186A3IYFDR 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 decades of expertise in precision signal conditioning and power management ICs.

The INA186 product line delivers ultra-low-power, high-accuracy current sensing for portable and energy-conscious systems-designed specifically to replace discrete op-amp solutions in battery monitoring, charger control, and power rail supervision.

FAQ

What is the function of the ENABLE pin on the INA186A3IYFDR?

The ENABLE pin on the INA186A3IYFDR is an active-high digital control input that powers up or shuts down the device. When driven to VS (≥1.35 V), the INA186A3IYFDR operates normally with 48 µA typical quiescent current; when pulled to GND, it enters shutdown mode drawing only 10 nA and placing the OUT pin in high-impedance state. This feature enables precise duty-cycled current monitoring in battery-powered applications.

Does the INA186A3IYFDR support bidirectional current sensing?

The INA186A3IYFDR supports bidirectional current sensing only when an external reference voltage is applied to the REF pin-but the YFD package used in INA186A3IYFDR has REF internally grounded. Therefore, INA186A3IYFDR operates unidirectionally by default. To achieve bidirectional operation, external circuitry must bias the REF node, though this requires careful layout to avoid degrading CMRR.

What is the maximum common-mode voltage the INA186A3IYFDR can handle?

The INA186A3IYFDR supports a common-mode input voltage range of –0.2 V to +40 V, independent of its 1.7–5.5 V supply voltage. This allows direct high-side sensing on 36-V industrial buses or automotive 24-V systems without level-shifting, and accommodates negative transients during hot-plug events in USB-C applications.

How does the zero-drift architecture benefit the INA186A3IYFDR in precision applications?

The zero-drift architecture of the INA186A3IYFDR delivers ±0.5 µV/°C offset drift and ±50 µV maximum offset voltage over temperature, enabling stable microamp-level current measurements without recalibration. In battery fuel gauging, this translates to <0.5% state-of-charge error drift over –40°C to +125°C-critical for long-term reliability in automotive and medical devices.

What package type is used for the INA186A3IYFDR and why is it suitable for portable electronics?

The INA186A3IYFDR uses a 1.17 mm × 0.765 mm DSBGA-6 (YFD) package with 0.4-mm pitch and bottom thermal pad. Its ultra-small footprint minimizes PCB area in smartphones and wearables, while the chip-scale construction provides excellent thermal performance in thin-profile assemblies-enabling integration into space-constrained battery management modules without compromising signal integrity.