STMicroelectronics TSC214ICT

Overview

TSC214ICT 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 100 V/V fixed gain, ±1% max gain error, ±60 µV max input offset voltage (25 °C), and operates from 2.7 V to 26 V supply with 100 µA quiescent current - enabling accurate sensing in battery chargers and industrial power rails.

For engineers reviewing the TSC214ICT datasheet, TSC214ICT pinout, TSC214ICT application, or TSC214ICT equivalent, key selection criteria include its QFN10 (1.8 × 1.4 mm) package, REF-pin programmable output common-mode level, 40 kHz bandwidth, 0.32 V/µs slew rate, and guaranteed performance over -40 °C to +125 °C.

Technical Context

The TSC214ICT employs a proprietary zero-drift chopper-stabilized architecture that actively corrects input offset voltage and drift, achieving 0.1 µV/°C max offset drift and 20 ppm/°C max gain drift. Its input stage supports operation with common-mode voltage exceeding V_CC (up to 26 V), drawing bias current from the Vicm rail when Vicm > 2.5 V.

Output common-mode level is set via the REF pin, enabling flexible unidirectional (GND- or V_CC-referenced) or bidirectional (mid-rail referenced) configurations. The device features 100 dB min CMRR and 10 µV/V PSRR at DC, with internal thin-film resistor networks ensuring stable gain accuracy independent of temperature and supply variation.

Key Specifications

Pinout & Package

Package: QFN10 (1.8 mm × 1.4 mm, 0.5 mm pitch, exposed thermal pad). Pin 1 marked by dot; pins 1–10 arranged top-view counterclockwise starting from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR and TSC213ICT, the TSC214ICT offers optimal balance of gain (100 V/V), offset (±60 µV), and REF-driven configurability - making it uniquely suitable for mid-range current sensing where both accuracy and design flexibility are required.

Availability

TSC214ICT is available at Aetrix Electronics and suitable for telecom equipment, battery chargers, and industrial PLC analog inputs requiring stable component supply, extended temperature operation, and zero-drift precision.

Supply support for TSC214ICT 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, microcontroller, 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 management systems where offset stability and rail-to-rail input capability are critical.

FAQ

Can TSC214ICT operate with input common-mode voltage higher than its supply voltage?

Yes - the TSC214ICT supports input common-mode voltages from –0.3 V to +26 V regardless of V_CC level. When Vicm exceeds 2.5 V, the device draws operating current from the common-mode rail itself via internal resistive paths (R1 + R4 = 1.005 MΩ), enabling true high-side sensing without auxiliary supplies.

How is bidirectional current measurement implemented using the REF pin?

Bidirectional operation is achieved by applying a mid-supply reference voltage (e.g., 2.5 V for 5 V V_CC) to the REF pin. This centers the output at 2.5 V: positive current produces output >2.5 V, negative current yields output <2.5 V. A buffered resistive divider or precision voltage source must drive REF to maintain low impedance and avoid ESD diode conduction.

What is the maximum capacitive load the TSC214ICT output can drive without instability?

The TSC214ICT is stable with up to 470 pF capacitive load at the output, as verified in the datasheet's electrical characteristics table. For larger loads (e.g., ADC input capacitance + PCB trace), a series 10 Ω isolation resistor is recommended to preserve phase margin and prevent ringing in step response.

Does TSC214ICT require external gain-setting resistors?

No - the TSC214ICT integrates laser-trimmed thin-film resistors to achieve its fixed 100 V/V gain. Unlike programmable current sense amplifiers, it requires no external components for gain configuration, reducing BOM count and layout sensitivity while guaranteeing ±1% gain error over temperature.