Texas Instruments INA2180A3IDGKT

Overview

INA2180A3IDGKT from Texas Instruments is a dual-channel, high-precision current-sense amplifier optimized for low- and high-side sensing in 2.7–5.5 V systems. It features 100 V/V fixed gain, ±500 µV maximum offset voltage at 12 V common-mode, 150 kHz bandwidth, 2 V/µs slew rate, and operates across –40°C to +125°C - enabling accurate real-time current monitoring in motor control and battery management circuits.

For engineers reviewing the INA2180A3IDGKT datasheet, INA2180A3IDGKT pinout, INA2180A3IDGKT application, or INA2180A3IDGKT equivalent, key selection criteria include its 100 V/V gain accuracy (±1% max), –0.2 V to +26 V input common-mode range independent of supply, dual-channel integration in VSSOP-8, and low 500 µA max quiescent current for power-constrained designs.

Technical Context

The INA2180A3IDGKT implements a precision current-shunt monitor architecture with matched internal gain resistors, eliminating external resistor matching errors and minimizing temperature-induced gain drift (1.5 ppm/°C). Its rail-to-rail output stage delivers 0.0005 V to (VS – 0.03 V) swing under 10 kΩ load, supporting direct interfacing with 12-bit+ ADCs.

Designed for bidirectional sensing, it maintains stable operation with differential input overloads up to ±26 V and rejects common-mode transients via 84–100 dB CMRR across –40°C to +125°C. The dual-channel layout enables synchronous current measurement across two power domains without crosstalk (≥110 dB channel separation at 10 kHz).

Key Specifications

Pinout & Package

The INA2180A3IDGKT is packaged in an 8-pin VSSOP (DGK) with 3.00 mm × 3.00 mm body size, thermal pad optional to GND, and rated for surface-mount reflow per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA2180A2IDGKT and INA240A3IDR, the INA2180A3IDGKT provides optimal trade-off between gain resolution, common-mode flexibility, and compact VSSOP-8 packaging - making it ideal for space-constrained dual-rail monitoring where 100× scaling matches standard ADC input ranges.

Availability

INA2180A3IDGKT is available at Aetrix Electronics and suitable for motor control, battery monitoring, and solar inverter applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.

Supply support for INA2180A3IDGKT 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 INA2180A3IDGKT belongs to TI's INAx180 family of cost-optimized current-sense amplifiers designed specifically for high-accuracy, wide common-mode current measurement in motor drives, power supplies, and energy systems.

FAQ

What is the maximum common-mode voltage the INA2180A3IDGKT can handle?

The INA2180A3IDGKT supports a common-mode input voltage range of –0.2 V to +26 V, independent of its 2.7–5.5 V supply voltage. This allows high-side sensing on 24-V bus rails while operating from a 3.3-V MCU supply. The specification is guaranteed across the full –40°C to +125°C temperature range and applies to both IN+ and IN– pins simultaneously.

Does the INA2180A3IDGKT require external gain-setting resistors?

No, the INA2180A3IDGKT integrates a precision-matched internal resistor network for 100 V/V fixed gain. This eliminates external resistor selection, layout sensitivity, and temperature-induced gain drift - delivering ±1% maximum gain error over temperature without calibration. External resistors are not supported or recommended for this variant.

What is the bandwidth and slew rate of the INA2180A3IDGKT?

The INA2180A3IDGKT has a small-signal bandwidth of 150 kHz (at C_LOAD = 10 pF) and a large-signal slew rate of 2 V/µs. These specifications enable accurate capture of fast current transients in PWM-driven loads, such as motor phase currents or switching regulator inrush events, without output distortion or settling delay.

Can the INA2180A3IDGKT be used for bidirectional current sensing?

Yes, the INA2180A3IDGKT supports bidirectional current sensing when the sense resistor is placed in a low-side configuration with the IN– pin grounded and the IN+ pin connected to the load side. Its rail-to-rail output (0.0005 V to VS – 0.03 V) allows unipolar or bipolar output mapping depending on system-level signal conditioning - confirmed in TI's SBOS741H datasheet Figure 9-2.

What package type and thermal characteristics does the INA2180A3IDGKT use?

The INA2180A3IDGKT is supplied in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm with an exposed thermal pad. Its junction-to-ambient thermal resistance (R_θJA) is 177.9°C/W, and the thermal pad may be left floating or connected to GND to improve heat dissipation - critical for sustained 500 µA operation in enclosed industrial enclosures.