STMicroelectronics TSC213IQT

Overview

TSC213IQT from STMicroelectronics is a zero-drift, high-precision current sense amplifier optimized for bidirectional or unidirectional shunt-based current measurement across -0.3 V to +26 V common-mode voltage range. It delivers 50 V/V fixed gain, ±1% max gain error, ±100 µV max input offset voltage (25 °C), and operates from 2.7 V to 26 V supply with 100 µA quiescent current. It supports industrial power management and battery charger feedback loops requiring stable low-drift sensing at extended temperature (-40 to 125 °C).

For engineers reviewing the TSC213IQT datasheet, TSC213IQT pinout, TSC213IQT application, or TSC213IQT equivalent, key selection criteria include its 50 V/V gain accuracy, 0.1 µV/°C max offset drift, 100 kHz bandwidth, SC70-6 and QFN10 package options, and support for both high-side and low-side sensing with externally adjustable output common-mode voltage via REF pin.

Technical Context

The TSC213IQT employs a proprietary zero-drift chopper-stabilized architecture with thin-film resistors to achieve ±100 µV max input offset and 0.1 µV/°C max offset drift over -40 to 125 °C. Its input stage draws bias current from the common-mode rail when Vicm > 2.5 V, enabling operation beyond supply rails.

It features a user-configurable output common-mode voltage set by the REF pin-grounded for unidirectional low-side sensing, tied to VCC for unidirectional high-side sensing, or biased to mid-rail for bidirectional current monitoring. CMRR is guaranteed ≥100 dB across -0.3 V to +26 V Vicm and full temperature range.

Key Specifications

Pinout & Package

Available in SC70-6 (1.6 × 1.6 mm) and QFN10 (1.8 × 1.4 mm, 0.5 mm pitch) packages. Both variants support identical functionality and pin mapping per DS13237 Rev 7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1, TSC213IQT offers superior configurability for bidirectional sensing and tighter offset drift, while TSC214IQT trades bandwidth for higher gain-making TSC213IQT optimal for balanced 100 kHz–50 V/V applications in industrial and computing power rails.

Availability

TSC213IQT is available at Aetrix Electronics and suitable for telecom power management, notebook battery charging, and industrial motor drive applications requiring stable component supply, long-lifecycle availability, and guaranteed parametric compliance per DS13237 Rev 7.

Supply support for TSC213IQT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in analog, power, microcontrollers, and sensors for industrial, automotive, and consumer markets.

The TSC21x series belongs to ST's precision analog portfolio, designed specifically for high-accuracy, rail-to-rail common-mode current sensing in power conversion, battery systems, and motor control-emphasizing zero-drift stability and wide supply compatibility.

FAQ

What is the maximum allowable voltage on the REF pin?

The REF pin voltage must remain within GND − 0.3 V to VCC + 0.3 V per absolute maximum ratings. Exceeding this range forward-biases internal ESD diodes, risking damage if current exceeds 5 mA. For robust designs, buffer REF with an op-amp (e.g., TSB611) when deriving from resistive dividers.

Can TSC213IQT operate with Vicm = 0 V in high-side configuration?

Yes-TSC213IQT supports true high-side sensing down to Vicm = −0.3 V. When used with a shunt between supply and load, VIN+ connects to supply rail and VIN− to load side, enabling measurement even when common-mode voltage equals system ground, provided VCC ≥ 2.7 V.

How does input bias current affect accuracy at low current levels?

Input bias current (15–35 µA) flows through the shunt resistor, creating an error voltage indistinguishable from sensed current. At 1 A full-scale with 10 mΩ shunt, this adds ≤0.35% error. For sub-100 mA measurements, select larger Rshunt or use TSC210/TSC211 to reduce relative impact.

Is the QFN10 package thermally enhanced compared to SC70-6?

Yes-QFN10 has R_th-JA = 124 °C/W versus 232 °C/W for SC70-6, enabling higher power dissipation in compact layouts. The exposed pad must be soldered to a thermal pad on PCB for effective heat transfer; recommended copper area ≥ 25 mm² with ≥4 thermal vias to inner ground plane.