Texas Instruments INA210AIRSWR

Overview

INA210AIRSWR 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, –0.3 V to 26 V common-mode input range, and operates from 2.7 V to 26 V supply. It enables precision 10-mV full-scale shunt measurements in battery chargers and telecom power rails.

For engineers reviewing the INA210AIRSWR datasheet, INA210AIRSWR pinout, INA210AIRSWR application, or INA210AIRSWR equivalent, this page delivers verified specifications, validated SC70/UQFN package mapping, confirmed pin functions for IN+, IN–, OUT, REF, GND, and V+, and two rigorously cross-checked alternative parts with documented functional and application-level differences.

Technical Context

The INA210AIRSWR implements a zero-drift chopper-stabilized amplifier architecture to achieve ultra-low offset and drift-critical for accurate sub-100-mV shunt voltage amplification. Its differential input stage rejects common-mode voltages up to 26 V independent of supply, enabling direct sensing on 12-V or 24-V rails while powered from 3.3 V or 5 V.

It uses internal matched thin-film resistors (R3 = 5 kΩ, R4 = 1 MΩ) to set its 200 V/V gain and provides rail-to-rail output swing (within 50 mV of V+ and 5 mV of GND) into 10-kΩ loads. The device supports reference voltage injection at the REF pin for level-shifting output, and its 14-kHz bandwidth suits DC and slow-varying current monitoring.

Key Specifications

Pinout & Package

INA210AIRSWR is packaged in the 10-pin Thin UQFN (RSW) variant, measuring 1.80 mm × 1.40 mm with 0.5-mm pitch and wettable flank terminations for automated optical inspection. This thermally enhanced package delivers 107.3°C/W junction-to-ambient thermal resistance and supports reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA210AIRSWR, INA214AIRSWR trades gain for improved noise immunity and relaxed layout constraints, while MAX40056AUT+T sacrifices common-mode range and temperature grade for smaller footprint and lower unit cost in low-voltage consumer applications.

Availability

INA210AIRSWR is available at Aetrix Electronics and suitable for battery charger monitoring, telecom power shelf current sensing, and notebook system power rail instrumentation requiring stable component supply across automotive, industrial, and computing end markets.

Supply support for INA210AIRSWR 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 chain solutions.

The INA21x product line was designed specifically for high-accuracy, low-drift current sensing in power-constrained and high-common-mode industrial, telecom, and computing systems-prioritizing offset stability, wide supply flexibility, and robust thermal performance.

FAQ

What is the maximum common-mode voltage supported by the INA210AIRSWR?

The INA210AIRSWR supports a common-mode input voltage range of –0.3 V to 26 V across its full operating temperature range (–40°C to +125°C). This specification is explicitly guaranteed for Version A devices per the official TI SBOS437K datasheet, and enables reliable high-side sensing on 24-V industrial buses while powered from a lower supply such as 3.3 V or 5 V. The INA210AIRSWR maintains specified gain error and CMRR within this range.

Does the INA210AIRSWR require external gain-setting resistors?

No, the INA210AIRSWR does not require external gain-setting resistors. It integrates precision thin-film resistors (R3 = 5 kΩ, R4 = 1 MΩ) to deliver a fixed 200 V/V gain. This eliminates resistor matching errors, temperature drift, and PCB layout sensitivity associated with discrete gain networks-ensuring consistent performance across units and over temperature without user configuration.

Can the INA210AIRSWR measure bidirectional current flow?

Yes, the INA210AIRSWR supports bidirectional current measurement. Its differential input architecture accepts both positive and negative voltage drops across the shunt resistor (V_IN+ – V_IN−). When combined with a non-zero reference voltage applied to the REF pin (e.g., 1.65 V for 3.3-V systems), the output swings above and below that reference to indicate direction-enabling accurate monitoring of charge/discharge cycles in battery systems.

What is the purpose of the dual IN+ and IN− pins on the RSW package?

The RSW (10-pin Thin UQFN) package of the INA210AIRSWR provides two dedicated pins each for IN+ (pins 2 and 3) and IN− (pins 4 and 5) to reduce parasitic series impedance and improve high-frequency common-mode rejection. TI's layout guidelines require these pins to be shorted together externally-effectively paralleling bond wires and minimizing voltage drop errors caused by PCB trace resistance during high-dI/dt events.

How does the REF pin affect the output voltage of the INA210AIRSWR?

The REF pin directly offsets the output voltage: V_OUT = 200 × (V_IN+ – V_IN−) + V_REF. Applying 0 V to REF yields a true differential output centered at 0 V; applying 1.65 V shifts the entire output range to 1.65 V ± (200 × V_SENSE). This enables level-shifting for single-supply ADC interfacing and bidirectional current encoding-provided the REF source has low impedance or is buffered to preserve CMRR.