Texas Instruments INA180B1IDBVT

Overview

INA180B1IDBVT from Texas Instruments is a single-channel, high-precision current-sense amplifier designed for low- and high-side sensing in power-constrained systems. It features 20 V/V fixed gain, –0.2 V to +26 V common-mode input range, ±150 µV max offset at 0 V VCM, 350 kHz bandwidth, and operates from 2.7 V to 5.5 V supply - enabling accurate current monitoring in motor control and battery management circuits.

For engineers reviewing the INA180B1IDBVT datasheet, INA180B1IDBVT pinout, INA180B1IDBVT application, or INA180B1IDBVT equivalent, key selection criteria include its SOT-23 pinout B configuration, 20 V/V gain accuracy (±1% max), 260 µA quiescent current, and operation across –40°C to +125°C - critical for industrial and automotive current-sensing designs.

Technical Context

The INA180B1IDBVT implements a precision instrumentation amplifier topology with integrated matched resistor gain network, delivering stable 20 V/V gain independent of temperature drift. Its input stage supports rail-to-rail common-mode operation down to –0.2 V, enabling true low-side sensing with ground-referenced shunts.

It uses a single-supply architecture with output swing within 30 mV of GND and 20 mV of VS, and achieves 2 V/µs slew rate to preserve fidelity during transient current events - essential for overcurrent detection in switching power stages and motor phase current feedback.

Key Specifications

Pinout & Package

The INA180B1IDBVT is housed in a 5-pin SOT-23 package (DBV) with Pinout B configuration, measuring 2.90 mm × 1.60 mm. This compact footprint supports high-density PCB layouts in space-constrained power modules and portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA180A1IDBVT and MAX40056ASA+T, the INA180B1IDBVT offers optimal balance of low quiescent current, industry-standard SOT-23 pinout B, and proven performance in 12–24 V industrial current sensing - making it preferred for cost-sensitive, space-constrained, and thermally demanding applications where 26-V VCM suffices.

Availability

INA180B1IDBVT 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 production ramp.

Supply support for INA180B1IDBVT 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 engineered specifically for cost-optimized, high-accuracy current sensing in industrial motor drives, battery systems, and renewable energy inverters - emphasizing low drift, wide common-mode range, and minimal external components.

FAQ

What is the pin configuration of the INA180B1IDBVT?

The INA180B1IDBVT uses Pinout B in its 5-pin SOT-23 (DBV) package: Pin 1 = IN+, Pin 2 = GND, Pin 3 = IN−, Pin 4 = OUT, Pin 5 = VS. This differs from Pinout A (used by INA180A1IDBVT), where OUT and IN+ positions are swapped - requiring careful PCB verification before substitution.

Does the INA180B1IDBVT support high-side current sensing?

Yes, the INA180B1IDBVT supports high-side sensing with a common-mode input range up to +26 V, independent of its 2.7–5.5 V supply voltage. For high-side use, connect IN+ to the bus-voltage side and IN− to the load side of the sense resistor - enabling direct measurement on 24-V rails without external level shifters.

What is the maximum allowable common-mode voltage for the INA180B1IDBVT?

The absolute maximum common-mode voltage for the INA180B1IDBVT is +26 V, as specified in the Absolute Maximum Ratings table. The recommended operating range is –0.2 V to +26 V, allowing true bidirectional low-side sensing (including negative currents) and robust high-side operation on standard industrial bus voltages.

How does the gain option of the INA180B1IDBVT compare to other variants in the family?

The INA180B1IDBVT is the 20 V/V gain variant (B1 suffix) of the INA180 family. Other options include B2 (50 V/V), B3 (100 V/V), and B4 (200 V/V). All share identical package, temperature range, and quiescent current - differing only in internal resistor ratio, which sets full-scale input range (e.g., 20 V/V supports ±25 mV VSENSE for 0–5 V output).

Is the INA180B1IDBVT suitable for automotive applications?

Yes, the INA180B1IDBVT is specified for operation from –40°C to +125°C and features 1 µV/°C max offset drift and 84 dB min CMRR - meeting key requirements for under-hood motor control and battery monitoring. While not AEC-Q100 qualified, its parametric performance aligns with Tier-1 automotive subsystem needs when validated in end-system testing.