Texas Instruments INA180B3IDBVT

Overview

INA180B3IDBVT from Texas Instruments is a single-channel, high-precision current-sense amplifier with 100 V/V fixed gain, –0.2 V to +26 V input common-mode range, ±500 µV max offset at 12 V VCM, and 2 V/µs slew rate-designed for accurate low- and high-side current monitoring in motor control and battery management systems.

For engineers reviewing the INA180B3IDBVT datasheet, INA180B3IDBVT pinout, INA180B3IDBVT application, or INA180B3IDBVT equivalent, this device delivers verified 100× gain accuracy, rail-to-rail output swing capability, and operation across –40°C to +125°C-critical for industrial power stage sensing and overcurrent protection circuits.

Technical Context

The INA180B3IDBVT implements a precision current-shunt monitor architecture with integrated matched resistor gain network, enabling stable 100 V/V gain independent of temperature drift (≤1 µV/°C offset drift) and supply voltage variation. Its input stage operates with true differential input tolerance up to ±26 V differential and –0.2 V to +26 V common-mode, supporting both low-side and high-side configurations without external level-shifting.

This B3 variant uses Pinout B (SOT-23-5), where IN+ occupies pin 1 and OUT occupies pin 4-distinct from Pinout A-and features 150 kHz small-signal bandwidth (C_LOAD = 10 pF), optimized for fast transient response in closed-loop motor drives and DC-DC converter current feedback paths.

Key Specifications

Pinout & Package

SOT-23-5 package (2.90 mm × 1.60 mm body), Pinout B configuration-compact footprint suitable for space-constrained PCB layouts in power modules and embedded controllers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA180A3IDBVT, the INA180B3IDBVT offers identical electrical performance in a mechanically distinct pinout-requiring layout revision but no recalibration. Versus INA240A3IDR, it trades higher voltage range and lower offset for significantly smaller size and lower power, making it optimal for cost- and space-sensitive consumer and embedded power systems.

Availability

INA180B3IDBVT is available at Aetrix Electronics and suitable for motor control, battery monitoring, and solar inverter applications requiring stable component supply, long-term production continuity, and guaranteed traceable sourcing.

Supply support for INA180B3IDBVT 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 INA180 family was designed specifically for cost-optimized, high-reliability current sensing in industrial, automotive, and renewable energy systems-emphasizing integration, wide common-mode operation, and robust thermal performance.

FAQ

What is the gain setting of the INA180B3IDBVT?

The INA180B3IDBVT has a fixed gain of 100 V/V, implemented via an internal matched resistor network. This gain is factory-trimmed and specified with ±1% maximum error over –40°C to +125°C. It scales a 10 mV differential input across the sense resistor to a 1 V output, directly compatible with most 3.3 V or 5 V ADC references. The "B3" suffix explicitly denotes the 100 V/V variant in Pinout B configuration.

Does the INA180B3IDBVT support high-side current sensing?

Yes, the INA180B3IDBVT supports high-side current sensing with a common-mode input range of –0.2 V to +26 V-fully covering typical 12 V, 24 V, and 48 V bus applications. When configured for high-side use, connect IN+ to the bus-voltage side and IN− to the load side of the sense resistor. Its ability to operate with inputs far above the VS supply rail (e.g., 24 V bus with 3.3 V supply) eliminates the need for level-shifting circuitry.

What is the difference between INA180B3IDBVT and INA180A3IDBVT?

The INA180B3IDBVT and INA180A3IDBVT share identical electrical specifications-including 100 V/V gain, ±500 µV max offset at 12 V VCM, and 150 kHz bandwidth-but differ exclusively in pin assignment. INA180B3IDBVT uses Pinout B (IN+ on pin 1, OUT on pin 4), while INA180A3IDBVT uses Pinout A (IN+ on pin 3, OUT on pin 1). No PCB redesign is possible without verifying trace routing compatibility.

What is the maximum capacitive load the INA180B3IDBVT can drive?

The INA180B3IDBVT is stable with capacitive loads up to 1 nF, as specified in the Electrical Characteristics table. Driving larger loads may cause peaking or oscillation due to phase margin degradation. For ADC interfaces requiring filtering, use a series resistor (e.g., 10–100 Ω) between OUT and the capacitor to isolate the amplifier output from the load capacitance-preserving stability while allowing anti-aliasing.

Is the INA180B3IDBVT suitable for automotive applications?

Yes, the INA180B3IDBVT is qualified for operation across –40°C to +125°C and meets AEC-Q200 stress test recommendations for passive components (though not formally AEC-Q100 certified). Its 26 V common-mode range, ±3000 V HBM ESD rating, and robust offset drift (≤1 µV/°C) make it suitable for under-hood motor control, battery disconnect units, and 12 V/48 V mild-hybrid subsystems-provided system-level qualification is completed per OEM requirements.