Texas Instruments INA286AIDGKR

Overview

INA286AIDGKR from Texas Instruments is a high-accuracy, bidirectional current shunt monitor with zero-drift architecture, designed for precision sensing across shunts at common-mode voltages from –14 V to +80 V. It delivers 100 V/V fixed gain, ±20 µV max offset voltage, 140 dB CMRR, and operates from a single 2.7 V to 18 V supply - enabling low-side and high-side current measurement in telecom power supplies and automotive battery management systems.

For engineers reviewing the INA286AIDGKR datasheet, INA286AIDGKR pinout, INA286AIDGKR application, or INA286AIDGKR equivalent, this device is selected for high-common-mode, low-offset current sensing where 10 mV full-scale shunt drops, ±1.4% max gain error over temperature, and 10 kHz bandwidth must be reliably achieved without external calibration.

Technical Context

The INA286AIDGKR uses a zero-drift chopper-stabilized amplifier topology to achieve ultra-low offset drift (0.3 µV/°C) and maintain accuracy across –40°C to +125°C. Its switched-capacitor input stage enables 140 dB DC common-mode rejection but introduces discrete-time behavior, requiring attention to step-response timing and internal clock phase during fast common-mode transients.

It supports unidirectional or bidirectional operation via dual reference inputs (REF1/REF2), allowing output biasing from GND to V+ (within 0–9 V limit), and integrates internal ESD protection rated at ±2000 V HBM - eliminating need for external clamping in automotive 12 V reverse-battery and 80 V load-dump scenarios.

Key Specifications

Pinout & Package

VSSOP-8 package (3.00 mm × 3.00 mm body size), thermally enhanced for high-density PCB layouts; exposed thermal pad recommended for optimal power dissipation in continuous 900 µA operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current shunt monitor applications.

Compared with INA282AIDGKR and INA283AIDGKR, the INA286AIDGKR provides balanced sensitivity (100 V/V) ideal for mid-range current sensing (1–50 A), offering tighter gain error stability over temperature than INA283 while delivering twice the gain of INA282 - reducing required shunt power dissipation by 50% versus INA282 at equal current resolution.

Availability

INA286AIDGKR is available at Aetrix Electronics and suitable for telecom power supply monitoring, automotive battery management, solar inverter MPPT control, and industrial motor drive feedback requiring stable component supply across extended temperature and high-common-mode-voltage conditions.

Supply support for INA286AIDGKR 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 amplifiers, power management, and signal chain solutions.

The INA28x product line was developed specifically for high-accuracy, wide common-mode current sensing in harsh environments - targeting automotive, industrial, and renewable energy applications demanding long-term stability and fault resilience.

FAQ

What is the maximum common-mode voltage the INA286AIDGKR can withstand?

The INA286AIDGKR supports a common-mode input voltage range of –14 V to +80 V. This allows it to operate safely during automotive battery reversal (–14 V) and load-dump transients (+80 V) without external protection components. The specification is guaranteed over the full –40°C to +125°C temperature range and applies to both +IN and –IN pins simultaneously relative to GND.

Does the INA286AIDGKR require external calibration for offset or gain error?

No, the INA286AIDGKR does not require external calibration. Its zero-drift architecture ensures ±20 µV maximum offset voltage and ±1.4% maximum gain error over temperature (–40°C to +125°C), with offset drift limited to 0.3 µV/°C. These specifications are factory tested and guaranteed - enabling direct connection to precision ADCs without trimming or software correction.

Can the INA286AIDGKR be used for bidirectional current sensing?

Yes, the INA286AIDGKR supports bidirectional current sensing via its dual reference inputs (REF1 and REF2). By setting both pins to V+/2, the output centers at mid-supply, allowing symmetric positive and negative output swings corresponding to forward and reverse current flow through the shunt resistor - all within the device's specified 100 V/V gain and 10 kHz bandwidth.

What is the purpose of the NC pin (Pin 4) on the INA286AIDGKR?

Pin 4 of the INA286AIDGKR is labeled NC (No Connect) and is not internally connected. It may be left floating or tied to GND with no effect on functionality, noise, or accuracy. This pin exists for package compatibility across the INA28x family and has no electrical role in the INA286AIDGKR's operation.

How does the INA286AIDGKR handle fast common-mode transients?

The INA286AIDGKR uses a switched-capacitor input architecture that delivers high DC CMRR (140 dB) but exhibits discrete-time behavior. Fast common-mode steps (e.g., 12 V or 50 V transients) may cause temporary offset errors lasting ≤15 µs, as documented in Figures 21–28 of the datasheet. These errors self-correct without latch-up or damage, and do not require external filtering or blanking circuits.