Texas Instruments INA213BIRSWT

Overview

INA213BIRSWT from Texas Instruments is a voltage-output, bidirectional current-shunt monitor with zero-drift architecture, designed for high-accuracy low- or high-side current sensing in power rails up to 26 V. It features a fixed gain of 50 V/V, ±100 µV maximum input offset voltage (RTI), 80 kHz bandwidth, 100 µA max quiescent current, and operates from 2.7 V to 26 V supply - enabling precise 10-mV full-scale shunt measurements in battery chargers and telecom power management.

For engineers reviewing the INA213BIRSWT datasheet, INA213BIRSWT pinout, INA213BIRSWT application, or INA213BIRSWT equivalent, this page delivers verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options - all grounded in TI's SBOS437K production data sheet and official RSW package documentation.

Technical Context

The INA213BIRSWT implements a zero-drift chopper-stabilized amplifier topology to achieve ±100 µV max RTI offset and 0.5 µV/°C max offset drift over –40°C to +125°C, supporting accurate low-voltage shunt sensing. Its differential input stage accepts common-mode voltages from –0.1 V to 26 V independent of supply, enabling direct measurement on hot-swap or 24-V industrial rails.

With a 50 V/V fixed gain, 100 ppm/°C max gain drift, and 100 dB min CMRR at DC, it delivers stable output scaling (V_OUT = I_LOAD × R_SHUNT × 50 + V_REF) across temperature and supply variation - optimized for integration with 12-bit+ ADCs in closed-loop power control systems.

Key Specifications

Pinout & Package

INA213BIRSWT is packaged in a 10-pin Thin UQFN (RSW) with 0.4-mm pitch, 1.80 mm × 1.40 mm body size, and wettable flank terminals for automated optical inspection. Thermal resistance is 107.3°C/W (Junction-to-Ambient) and 18.7°C/W (Junction-to-Board), supporting high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA213AIDR and MAX40056ATA+T, the INA213BIRSWT uniquely balances ultra-low offset tolerance, 26-V common-mode operation, and compact UQFN thermal performance - making it the optimal choice for space-constrained, wide-input industrial and telecom current sensing.

Availability

INA213BIRSWT is available at Aetrix Electronics and suitable for power supply monitoring, battery management systems, telecom power shelves, and USB-C PD controller feedback requiring stable component supply across extended temperature and voltage ranges.

Supply support for INA213BIRSWT 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 amplifiers and power management ICs.

The INA21x product line was engineered specifically for high-accuracy, low-drift current sensing in demanding power systems - targeting applications where shunt voltage is constrained to ≤10 mV and common-mode voltages exceed supply rails.

FAQ

What is the maximum common-mode voltage supported by the INA213BIRSWT?

The INA213BIRSWT supports a common-mode input voltage range of –0.1 V to 26 V across its full operating temperature range (–40°C to +125°C). This allows direct high-side sensing on 24-V industrial buses or telecom intermediate rails without external level-shifting circuitry - a key differentiator versus standard op-amps or lower-voltage current-sense amplifiers.

Does the INA213BIRSWT require external resistors to set gain?

No, the INA213BIRSWT has a factory-trimmed fixed gain of 50 V/V. Unlike programmable current-sense amplifiers, it contains internal precision thin-film resistors that eliminate the need for external gain-setting networks - reducing component count, layout area, and potential matching errors in production designs.

Can the INA213BIRSWT measure bidirectional current flow?

Yes, the INA213BIRSWT is explicitly designed for bidirectional current sensing. Its output voltage polarity follows the sign of the differential input voltage (V_IN+ – V_IN−), enabling detection of both charge and discharge currents in battery systems - provided the REF pin is configured appropriately (e.g., tied to mid-supply for symmetric swing).

What is the purpose of the REF pin on the INA213BIRSWT?

The REF pin sets the output voltage offset baseline: V_OUT = (V_IN+ – V_IN−) × 50 + V_REF. It accepts 0 V to V+ and enables level-shifting - e.g., tying REF to 1.65 V on a 3.3-V system allows bidirectional output swing from 0 V to 3.3 V. TI recommends buffering REF if driven from high-impedance dividers to preserve CMRR.

Is the INA213BIRSWT pin-compatible with other INA21x variants?

No - the INA213BIRSWT shares the same RSW package footprint and pinout with all INA21x family members (e.g., INA214BIRSWT, INA215BIRSWT), but gain, offset, and bandwidth differ per variant. Pin compatibility enables layout reuse across designs requiring different gains, though firmware and calibration must be updated to match the selected device's transfer function.