Texas Instruments INA180B3IDBVR

Overview

INA180B3IDBVR from Texas Instruments is a single-channel, high-precision current-sense amplifier with 100 V/V fixed gain, –0.2 V to +26 V common-mode input range, ±500 µV max offset at 12 V VCM, and 2 V/µs slew rate-designed for accurate bidirectional current monitoring in motor control and battery management systems.

For engineers reviewing the INA180B3IDBVR datasheet, INA180B3IDBVR pinout, INA180B3IDBVR application, or INA180B3IDBVR equivalent, this page delivers verified electrical specs, SOT-23 pinout mapping, real-world use cases, and two validated alternative parts with documented functional and application differences.

Technical Context

The INA180B3IDBVR implements a precision instrumentation amplifier topology with integrated matched resistor gain network (100 V/V), enabling stable gain accuracy (±1% max) and low temperature drift (1 µV/°C max offset drift) across –40°C to +125°C. Its input stage operates with rail-to-rail common-mode capability beyond supply voltage, supporting both low-side and high-side sensing without level-shifting circuitry.

It features a 150 kHz small-signal bandwidth (A3 variant), 260 µA max quiescent current, and output swing within 30 mV of GND and 20 mV of VS-optimized for direct interfacing with 12-bit+ ADCs in space-constrained industrial and automotive power stages.

Key Specifications

Pinout & Package

The INA180B3IDBVR is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, using Pinout B configuration per TI SBOS741H Rev H.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA180A3IDBVR, the INA180B3IDBVR offers identical electrical performance but mandates different PCB routing due to inverted IN+/OUT placement; versus INA240A3IDR, it trades higher voltage range and precision for smaller size and lower cost-making it optimal for space-constrained 24-V systems where 26 V VCM suffices.

Availability

INA180B3IDBVR is available at Aetrix Electronics and suitable for motor control, battery monitoring, and power management applications requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.

Supply support for INA180B3IDBVR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The INA180 family targets cost-optimized, high-accuracy current sensing in space-constrained applications-including motor drives, battery systems, and power supplies-where fixed-gain, low-quiescent-current amplifiers simplify design and reduce BOM count.

FAQ

What is the gain setting of the INA180B3IDBVR?

The INA180B3IDBVR is configured with a fixed gain of 100 V/V, as indicated by the "B3" suffix in its part number. This gain is implemented via an internal matched resistor network, eliminating external gain-setting components and ensuring ±1% maximum gain error across temperature. The 100 V/V ratio enables high-resolution current sensing with typical shunt values (e.g., 5–10 mΩ) while maintaining output headroom for 3.3-V or 5-V ADC interfaces. This gain is factory-trimmed and cannot be adjusted externally.

Does the INA180B3IDBVR support high-side current sensing?

Yes, the INA180B3IDBVR supports high-side current sensing with a common-mode input voltage range of –0.2 V to +26 V-fully independent of its 2.7–5.5 V supply voltage. When used in high-side configuration, connect IN+ to the bus-voltage side of the sense resistor and IN− to the load side. Its robust CMRR (≥84 dB) and low input bias current (<0.1 µA) ensure accurate measurements even on noisy 24-V rails. No external level-shifting circuitry is required, simplifying design and improving reliability.

What package and pinout does the INA180B3IDBVR use?

The INA180B3IDBVR uses the 5-pin SOT-23 (DBV) package with Pinout B configuration: Pin 1 = IN+, Pin 2 = GND, Pin 3 = IN−, Pin 4 = OUT, Pin 5 = VS. This differs from Pinout A (used by INA180A3IDBVR), where OUT is on Pin 1 and IN+ is on Pin 3. Layouts designed for Pinout A are not compatible without trace rework. The DBV package measures 2.90 mm × 1.60 mm and supports reflow soldering per JEDEC J-STD-020.

What is the maximum operating temperature for the INA180B3IDBVR?

The INA180B3IDBVR is specified for operation across the extended industrial temperature range of –40°C to +125°C. All key parameters-including offset voltage (±500 µV max at 12 V VCM), gain error (±1% max), and quiescent current (300 µA max)-are guaranteed over this full range. Thermal metrics (RθJA = 197.1°C/W) confirm suitability for surface-mount applications on standard FR-4 PCBs with moderate copper pour; derating is recommended above 105°C ambient in high-power-density layouts.

How does the INA180B3IDBVR differ from the INA240 series?

The INA180B3IDBVR differs from the INA240 series in three key ways: it has a narrower common-mode range (–0.2 V to +26 V vs. –4 V to +80 V), higher offset voltage (±500 µV vs. ±10 µV), and lower bandwidth (150 kHz vs. 400 kHz). However, it offers lower quiescent current (260 µA vs. 2.4 mA), smaller SOT-23 package (vs. SOIC-8), and lower cost-making it ideal for cost-sensitive, space-constrained 24-V systems where ultimate precision or ultra-high voltage operation is unnecessary. Both families support high-side and low-side sensing.