STMicroelectronics TSC213IYCT

Overview

TSC213IYCT 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 features fixed gain of 50 V/V, ±1% max gain error, ±100 µV max input offset voltage (25 °C), 100 kHz bandwidth, and operates from 2.7 V to 26 V supply with quiescent current of 100 µA. It is used in battery chargers and industrial power management systems requiring stable low-drift sensing at extended temperature (-40 to 125 °C).

For engineers reviewing the TSC213IYCT datasheet, TSC213IYCT pinout, TSC213IYCT application, or TSC213IYCT equivalent, key selection criteria include its 50 V/V gain configuration, SC70-6 and QFN10 package options, -0.3 to 26 V common-mode input range, 0.1 µV/°C max offset drift, and support for both high-side and low-side sensing topologies.

Technical Context

The TSC213IYCT employs a proprietary zero-drift chopper-stabilized architecture that actively corrects input offset voltage and drift, enabling precision current measurement even under wide common-mode voltage swings. Its internal thin-film resistor network ensures stable gain accuracy (±1% max) and high CMRR (100–120 dB) across temperature and supply variations.

It supports flexible output common-mode control via the REF pin, allowing configuration for unidirectional (GND- or VCC-referenced) or bidirectional (mid-supply referenced) operation. Input bias current remains below 35 µA, and the device draws only 100 µA quiescent current while maintaining 100 kHz bandwidth and 0.85 V/µs slew rate - critical for fast transient response in charger feedback loops.

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 are surface-mount, lead-free, and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR, TSC213IYCT offers 24× lower quiescent current and smaller footprint but trades off common-mode range and bandwidth; versus TSC214IYCT, it provides 2× lower gain for wider full-scale current range at same shunt value - simplifying design for multi-ampere charging systems.

Availability

TSC213IYCT is available at Aetrix Electronics and suitable for battery chargers, industrial 24 V power monitors, and notebook computer adapter protection requiring stable component supply across automotive-grade temperature cycling and long-lifecycle production.

Supply support for TSC213IYCT 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, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The TSC21x series belongs to ST's precision analog portfolio, engineered specifically for high-accuracy, wide common-mode current sensing in power conversion, battery management, and industrial control - emphasizing zero-drift stability and single-supply flexibility.

FAQ

What is the maximum shunt resistance compatible with TSC213IYCT for 1 A full-scale measurement?

At 1 A and gain = 50 V/V, full-scale output is 50 mV. With ±100 µV offset, minimum resolvable differential voltage is ~200 µV. Thus, maximum usable shunt is 200 µV / 1 A = 200 mΩ. For better SNR, 50–100 mΩ is recommended - yielding 2.5–5 mV output at 1 A, well above offset uncertainty.

Can TSC213IYCT operate with VREF tied directly to VCC without a buffer?

Yes - VREF can be connected directly to VCC for unidirectional high-side sensing. The internal REF pin input impedance is high (>1 MΩ), so no buffer is needed. However, if driving REF from a resistive divider, a unity-gain op-amp buffer is mandatory to prevent loading-induced reference shift and ensure stable common-mode setting.

Does TSC213IYCT support bidirectional current sensing with a single supply?

Yes - by applying a mid-supply voltage (e.g., VCC/2) to the REF pin, the output centers at VCC/2. A positive shunt voltage produces OUT > VCC/2; negative produces OUT < VCC/2. This enables true bidirectional measurement using only one supply, provided the downstream ADC supports differential or ratiometric input referencing.

How does input bias current affect accuracy at high common-mode voltages?

Above 2.5 V common-mode, TSC213IYCT draws additional current from the VICM rail (~20 µA base + slope-dependent term). At 12 V VICM, input bias reaches ~35 µA. When measuring small currents (e.g., <10 mA), this introduces up to 0.35% error in shunt voltage - requiring either larger shunt values or calibration compensation in firmware.