Texas Instruments INA284AIDGKT

Overview

INA284AIDGKT from Texas Instruments is a high-accuracy, zero-drift current shunt monitor IC designed for bidirectional sensing across precision shunts in high common-mode voltage environments. It delivers 500 V/V fixed gain, ±20 µV max offset voltage, 140 dB CMRR, and operates from +2.7 V to +18 V supply while supporting –14 V to +80 V input common-mode range - enabling accurate low-side and high-side current measurement in telecom power supplies and solar inverter DC-link monitoring.

For engineers reviewing the INA284AIDGKT datasheet, INA284AIDGKT pinout, INA284AIDGKT application, or INA284AIDGKT equivalent, this device is selected for high-precision, wide common-mode current sensing where sub-10 mV full-scale shunt drops, temperature-stable gain (0.005%/°C max), and robust transient immunity are required in automotive, industrial, and renewable energy systems.

Technical Context

The INA284AIDGKT uses a zero-drift chopper-stabilized architecture with switched-capacitor input stage to achieve ultra-low offset drift (0.3 µV/°C typ) and maintain 140 dB CMRR over frequency. Its internal reference divider enables flexible unidirectional or bidirectional output configuration via REF1/REF2 pins, supporting ground-, V+-, or external-reference referenced outputs.

This device implements discrete-time behavior due to its clocked input structure, resulting in an effective bandwidth of 4 kHz and step-response settling within 15 µs after common-mode transients - critical for fast-switching power converters and fault-detection circuits requiring stable output under rapid bus voltage shifts.

Key Specifications

Pinout & Package

VSSOP-8 package (3.00 mm × 3.00 mm body size), thermally enhanced for high-density PCB layouts in power management modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA284AIDGKT, INA285AIDGKT offers higher gain and lower offset but sacrifices bandwidth and increases sensitivity to noise; INA283AIDGKT trades gain and offset performance for greater speed and tolerance to higher shunt voltages - making INA284AIDGKT the optimal balance for 10–50 mV shunt applications demanding accuracy, speed, and common-mode robustness.

Availability

INA284AIDGKT is available at Aetrix Electronics and suitable for telecom equipment, automotive battery management, and solar inverter applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for INA284AIDGKT 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, embedded processing, and power management technologies, with decades of expertise in precision signal conditioning and high-reliability industrial ICs.

The INA28x family was engineered specifically for high-accuracy, wide common-mode current sensing in harsh electrical environments - targeting power conversion, automotive electrification, and renewable energy systems where measurement integrity directly impacts safety and efficiency.

FAQ

What is the maximum common-mode voltage the INA284AIDGKT can handle?

The INA284AIDGKT supports a common-mode input voltage range of –14 V to +80 V, independent of supply voltage. This allows safe high-side sensing on 48 V telecom buses and compatibility with automotive battery-reversal and load-dump transients per ISO 7637-2. Operation beyond these limits risks permanent damage and is not supported.

Does the INA284AIDGKT require external calibration for precision current measurement?

No, the INA284AIDGKT does not require external calibration for most applications. Its zero-drift architecture ensures ±20 µV max offset and 0.005%/°C max gain drift over –40°C to +125°C, enabling <1% total error across temperature without trimming. System-level calibration may still be applied for highest accuracy, but it is not mandatory for typical industrial use cases.

Can the INA284AIDGKT be used for bidirectional current sensing?

Yes, the INA284AIDGKT supports bidirectional current sensing via its dual reference inputs (REF1 and REF2). By setting their average voltage to mid-supply (e.g., V+/2), the output centers at that voltage and swings above/below it proportionally to positive/negative shunt voltage polarity - enabling full four-quadrant motor control and battery charge/discharge monitoring in INA284AIDGKT-based designs.

What package type is supplied for the INA284AIDGKT?

The INA284AIDGKT is supplied in an 8-pin VSSOP package (DGK suffix), measuring 3.00 mm × 3.00 mm with 0.65 mm lead pitch. This thermally efficient, surface-mount package supports high-density layouts and meets JEDEC MO-178 standards, with RθJA = 164.1°C/W for standard PCB mounting.

How does the INA284AIDGKT handle fast common-mode transients?

The INA284AIDGKT exhibits discrete-time behavior due to its switched-capacitor input architecture, causing transient-induced offset errors during rapid common-mode steps. However, these errors settle within 15 µs after disturbance removal, as verified in Figure 21–24 of the SBOS485C datasheet. For systems requiring immediate fidelity, external filtering or timing-aware sampling synchronization is recommended alongside INA284AIDGKT deployment.