Texas Instruments INA210CIRSWT

Overview

INA210CIRSWT from Texas Instruments is a zero-drift, voltage-output current-shunt monitor optimized for bidirectional high- or low-side sensing in power management systems. It features 200 V/V fixed gain, ±35 µV max offset voltage, 0.5 µV/°C max offset drift, –0.1 V to 26 V common-mode input range, and operates from 2.7 V to 26 V supply. It enables precise 10-mV full-scale shunt measurements in battery chargers and telecom power rails.

For engineers reviewing the INA210CIRSWT datasheet, INA210CIRSWT pinout, INA210CIRSWT application, or INA210CIRSWT equivalent, this page delivers verified specifications, package mapping to RSW (10-pin Thin UQFN), functional pin roles, real-world use cases in power monitoring, and validated alternative options - all grounded in TI's SBOS437K production data sheet.

Technical Context

The INA210CIRSWT implements a precision zero-drift chopper-stabilized amplifier architecture with matched internal resistive gain network (R3 = 5 kΩ, R4 = 1 MΩ) to achieve ±35 µV max input offset and 0.5 µV/°C max drift over –40°C to +125°C. Its differential input stage operates independently of supply voltage, supporting common-mode voltages up to 26 V while powered from as low as 2.7 V.

It delivers 14 kHz bandwidth with 0.4 V/µs slew rate and 25 nV/√Hz input-referred voltage noise. The device uses a single-ended output referenced to an externally supplied REF pin (0 V to V+), enabling flexible level-shifting and differential-sensing configurations without requiring rail-to-rail output swing.

Key Specifications

Pinout & Package

INA210CIRSWT is packaged in a 10-pin Thin UQFN (RSW) with 1.80 mm × 1.40 mm body size and 0.5-mm pitch. Thermal resistance is 107.3°C/W (junction-to-ambient) and 18.7°C/W (junction-to-board), supporting compact PCB layouts with moderate power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA210CIRSWT, INA210AIDCKR trades accuracy for smaller SC70 packaging and lower cost, while INA226AIRGTR replaces analog output with integrated digital conversion - offering higher system-level flexibility at the expense of analog simplicity and lower latency.

Availability

INA210CIRSWT is available at Aetrix Electronics and suitable for battery charger monitoring, telecom power shelf supervision, notebook system power rail tracking, and industrial PLC I/O modules requiring stable component supply across extended temperature and long product lifecycles.

Supply support for INA210CIRSWT 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 solutions.

The INA21x family was designed specifically for high-accuracy, wide common-mode current sensing in power-constrained and thermally demanding environments - targeting server PSUs, telecom infrastructure, and portable electronics.

FAQ

What is the maximum common-mode voltage supported by the INA210CIRSWT?

The INA210CIRSWT 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 specification applies specifically to Version C devices like INA210CIRSWT and enables reliable high-side sensing on 24-V industrial rails without external level-shifting circuitry. The –0.1 V lower limit permits slight negative transients during switching events.

Does the INA210CIRSWT require external components for basic operation?

Yes - the INA210CIRSWT requires a 0.01 µF to 0.1 µF ceramic bypass capacitor between V+ and GND, placed as close as possible to the pins. It also needs a low-impedance REF voltage source (e.g., buffered divider or dedicated reference IC) to maintain specified CMRR. No external gain-setting resistors are needed since gain is fixed at 200 V/V internally.

Can the INA210CIRSWT measure bidirectional current flow?

Yes - the INA210CIRSWT supports bidirectional current sensing when the REF pin is biased to mid-supply (e.g., V+/2). With REF = V+/2, the output swings symmetrically around that voltage: positive current yields V_OUT > V_REF, negative current yields V_OUT < V_REF. This configuration is explicitly validated in TI's SBOS437K datasheet for INA210CIRSWT.

What is the thermal performance of the RSW package used in INA210CIRSWT?

The INA210CIRSWT in the RSW (10-pin Thin UQFN) package has a junction-to-board thermal resistance (R_θJB) of 18.7°C/W and junction-to-ambient (R_θJA) of 107.3°C/W under standard JEDEC test conditions. These values assume proper PCB copper pour and thermal vias - enabling reliable operation at full 100 µA quiescent current without heatsinking in typical 4-layer boards.

How does the zero-drift architecture of INA210CIRSWT improve measurement accuracy?

The zero-drift chopper-stabilized design of INA210CIRSWT achieves ±35 µV maximum input offset voltage and only 0.5 µV/°C maximum offset drift over –40°C to +125°C. This enables accurate 10-mV full-scale shunt measurements with <0.35% total unadjusted error - a 10× improvement over non-zero-drift amplifiers requiring 100-mV shunts for comparable accuracy.