Texas Instruments INA186A4IDDFT

Overview

INA186A4IDDFT from Texas Instruments is a bidirectional, zero-drift current-sense amplifier with 200 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 battery-powered portable electronics using high-side or low-side shunt configurations.

For engineers reviewing the INA186A4IDDFT datasheet, INA186A4IDDFT pinout, INA186A4IDDFT application, or INA186A4IDDFT equivalent, key selection criteria include its enable-controlled ultra-low-power shutdown (10 nA), rail-to-rail output swing (GND + 1 mV / VS – 40 mV), bidirectional sensing capability via REF pin, and SC70-6 package compatibility with space-constrained PCB layouts.

Technical Context

The INA186A4IDDFT uses a capacitively coupled front-end architecture to achieve 120 dB minimum CMRR and reject DC common-mode shifts up to ±40 V independent of 1.7–5.5 V supply. Its zero-drift design maintains ±0.5 µV/°C max offset drift and ±1% max gain error across –40°C to +125°C.

This variant integrates an ENABLE pin (pin 2) for power-gating control and a REF pin (pin 1) to support bidirectional current measurement by offsetting the output baseline. Input bias current remains at 0.5–3 nA across full common-mode range, enabling accurate use of high-value sense resistors without signal degradation.

Key Specifications

Pinout & Package

The INA186A4IDDFT is housed in a 6-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for high-density portable PCBs. Pin 1 is REF, pin 2 is ENABLE, pin 3 is VS, pin 4 is IN+, pin 5 is IN–, and pin 6 is OUT.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA186A4IDDFT, INA219BIDR trades analog bandwidth and 40-V CMR for integrated digitization and serial interface, while MAX40016AUT#T sacrifices bidirectionality and enable functionality to reduce unit cost and footprint-neither offers drop-in replacement capability due to pinout, feature set, and electrical interface differences.

Availability

INA186A4IDDFT is available at Aetrix Electronics and suitable for smartphone battery management, notebook PC power monitoring, USB-C PD charger feedback, merchant server PSU telemetry, and portable medical device current supervision requiring stable component supply and long-term production continuity.

Supply support for INA186A4IDDFT 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 battery-operated and energy-efficient systems, targeting applications where microamp-level measurement fidelity, wide common-mode range, and minimal supply current are critical design requirements.

FAQ

What is the maximum common-mode voltage supported by the INA186A4IDDFT?

The INA186A4IDDFT supports a common-mode input voltage range from –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 automotive or server rails without level-shifting circuitry. The specification is guaranteed across the full –40°C to +125°C operating temperature range and applies to both IN+ and IN– pins referenced to GND.

Does the INA186A4IDDFT support bidirectional current sensing, and how is it configured?

Yes, the INA186A4IDDFT supports bidirectional current sensing via its REF pin (Pin 1). When a reference voltage (typically VS/2) is applied to REF, positive differential input (IN+ > IN–) produces an output above VREF, and negative differential input (IN+ < IN–) produces an output below VREF. The SC70-6 DCK package includes both REF and ENABLE pins, making INA186A4IDDFT fully capable of bidirectional operation out of the box.

What is the typical quiescent current of the INA186A4IDDFT, and how does it change when disabled?

The INA186A4IDDFT draws 48 µA typical quiescent current during normal operation. When the ENABLE pin (Pin 2) is driven to GND, the device enters shutdown mode and draws only 10 nA typical supply current. This ultra-low shutdown current extends battery life in duty-cycled applications such as wearable health monitors or wireless sensor nodes that sample current infrequently.

Can the INA186A4IDDFT operate from a 1.8-V supply, and what is its output swing performance at that voltage?

Yes, the INA186A4IDDFT operates from 1.7 V to 5.5 V, including 1.8-V nominal supplies. At VS = 1.8 V, its output swings from GND + 1 mV to VS – 40 mV (i.e., 1.76 V), delivering >98% of the available voltage range. This rail-to-rail capability ensures maximum ADC utilization and measurement resolution in low-voltage portable systems without external level-shifting.

What package type and dimensions does the INA186A4IDDFT use, and is it compatible with standard SC70 footprints?

The INA186A4IDDFT uses the SC70-6 (DCK) package with nominal body dimensions of 2.00 mm × 1.25 mm and 0.65-mm lead pitch. It is fully compatible with industry-standard SC70 footprints and reflow profiles. The pinout matches JEDEC MO-203-DA, enabling drop-in placement on existing designs using other SC70-6 current-sense amplifiers-though functional validation is required due to differences in REF/ENABLE implementation.