Texas Instruments INA186A2IYFDR

Overview

INA186A2IYFDR from Texas Instruments is a bidirectional, zero-drift current-sense amplifier with 50 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 measurement in battery-powered consumer electronics requiring low-power, high-accuracy sensing across wide voltage rails.

For engineers reviewing the INA186A2IYFDR datasheet, INA186A2IYFDR pinout, INA186A2IYFDR application, or INA186A2IYFDR equivalent, key selection criteria include its DSBGA-6 (YFD) package with ENABLE pin, bidirectional capability via external REF biasing, rail-to-rail output swing (GND + 1 mV), and guaranteed 120 dB CMRR over –40°C to +125°C.

Technical Context

The INA186A2IYFDR 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 ±50 µV offset and 0.5 µV/°C drift, critical for stable light-load measurements.

With 50 V/V gain, 37 kHz bandwidth (C_LOAD = 10 pF), and 0.3 V/µs slew rate, it supports fast transient response in closed-loop power management. The ENABLE pin (B3) reduces supply current to 10 nA in shutdown, and the DSBGA-6 package supports space-constrained portable designs but lacks internal REF connection-REF must be externally driven for bidirectional operation.

Key Specifications

Pinout & Package

INA186A2IYFDR is packaged in a 1.17 mm × 0.765 mm, 6-ball DSBGA (YFD) package with bottom-side solder balls. This ultra-compact, low-profile package is optimized for space-constrained portable applications and supports reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA219BIDR and MAX4008AUB+T, INA186A2IYFDR uniquely combines DSBGA-6 size, ENABLE-controlled ultra-low power (10 nA), and ±50 µV offset in a single analog-output device-making it optimal for miniaturized, battery-sensitive bidirectional sensing where MCU ADC resources are constrained.

Availability

INA186A2IYFDR is available at Aetrix Electronics and suitable for smartphone battery management, USB-C power delivery monitors, consumer wireless chargers, network equipment PSU monitoring, and portable medical device current supervision requiring stable component supply and long-term production continuity.

Supply support for INA186A2IYFDR 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 headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and consumer markets.

INA186A2IYFDR belongs to TI's precision current-sense amplifier product line, engineered specifically for ultra-low-power, high-accuracy bidirectional current monitoring in space- and energy-constrained portable electronics.

FAQ

What is the maximum common-mode voltage supported by the INA186A2IYFDR?

The INA186A2IYFDR 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 24 V or 36 V rails while powered from a 3.3 V MCU domain. The specification is guaranteed over the full –40°C to +125°C temperature range and applies to both IN+ and IN– pins referenced to GND.

Does the INA186A2IYFDR support bidirectional current sensing, and how is it implemented?

Yes, the INA186A2IYFDR supports bidirectional current sensing when an external reference voltage is applied to the REF pin (which must be driven externally, as the DSBGA-6 package does not internally connect REF). With V_REF set to mid-supply (e.g., 1.65 V on 3.3 V), positive differential input yields OUT > V_REF, and negative differential input yields OUT < V_REF. This enables charge/discharge detection in battery applications without polarity-switching circuitry.

What is the function of the ENABLE pin on the INA186A2IYFDR, and what happens when it is grounded?

The ENABLE pin (ball B3) controls device activation. When driven to VS, the INA186A2IYFDR operates normally with 48 µA typical quiescent current. When driven to GND, the device enters shutdown: supply current drops to 10 nA typical, and the OUT pin enters high-impedance state. This feature is essential for duty-cycled current monitoring in battery-powered systems to maximize runtime.

What are the key accuracy specifications of the INA186A2IYFDR at room temperature?

At TA = 25°C, the INA186A2IYFDR guarantees ±1% maximum gain error, ±50 µV maximum offset voltage (referred-to-input), 10 ppm/°C maximum gain drift, and 0.5 µV/°C maximum offset drift. Its 120 dB minimum CMRR ensures immunity to bus voltage fluctuations, and 75 nV/√Hz input-referred voltage noise supports high-resolution measurements even with small shunt resistors.

Can the INA186A2IYFDR be used in low-side current sensing configurations, and what are the grounding considerations?

Yes, the INA186A2IYFDR supports low-side sensing: connect IN+ to the load side of the shunt and IN– to system ground. GND must be tied directly to the shunt's ground node to avoid measurement errors from ground path resistance. Because the device's common-mode range extends to –0.2 V, it tolerates minor ground bounce. For best accuracy, route GND and IN– traces together with minimal loop area and avoid sharing GND paths with high-current return paths.