STMicroelectronics TSC214IQT

Overview

TSC214IQT 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 100 V/V fixed gain, ±1% max gain error, ±60 µV max input offset voltage (25 °C), 0.1 µV/°C max offset drift, and operates from 2.7 V to 26 V supply over -40 °C to +125 °C - enabling accurate sensing in battery chargers and industrial power rails.

For engineers reviewing the TSC214IQT datasheet, TSC214IQT pinout, TSC214IQT application, or TSC214IQT 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 under high common-mode transients in telecom and notebook power management systems.

Technical Context

The TSC214IQT employs a proprietary zero-drift chopper-stabilized architecture with thin-film resistors to achieve <±60 µV offset and <0.3 µV/°C drift over -40 °C to +125 °C. Its input stage draws bias current from the common-mode rail when Vicm > 2.5 V, enabling operation beyond supply rails.

Output common-mode voltage is set via the REF pin (0 V to VCC), supporting ground-referenced, VCC-referenced, or mid-rail bidirectional configurations. CMRR exceeds 100 dB up to 100 kHz and PSRR remains >100 dB at DC, ensuring robustness against supply and common-mode noise in noisy power systems.

Key Specifications

Pinout & Package

Package: QFN10 (1.8 mm × 1.4 mm, 0.5 mm pitch, exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSC214IQT, INA240A1QDRQ1 extends common-mode capability to 80 V but sacrifices zero-drift stability and requires additional components for bidirectional operation; TSC213IQT shares identical packaging and thermal performance but trades gain and offset for higher full-scale current tolerance at reduced precision.

Availability

TSC214IQT is available at Aetrix Electronics and suitable for battery chargers, industrial 24 V power rails, notebook VRMs, and telecom DC-DC converters requiring stable component supply, extended temperature operation, and high-accuracy current feedback.

Supply support for TSC214IQT 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 zero-drift stability and rail-to-rail input capability are critical.

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. Exceeding this range forward-biases internal ESD diodes, risking damage if current exceeds 5 mA. For mid-rail operation, use a buffered voltage divider (e.g., op-amp follower) rather than direct resistor connection to ensure low impedance and prevent loading errors.

Can TSC214IQT operate with VCC = 3.3 V while sensing a 24 V common-mode signal?

Yes. The device draws auxiliary current from the VIN+ node when Vicm > 2.5 V, enabling full functionality with VCC as low as 2.7 V even at +24 V common-mode. Quiescent current remains 100 µA, and gain, offset, and CMRR specifications are fully guaranteed across the entire 2.7–26 V supply range.

How does the QFN10 package affect thermal performance in high-power PCB layouts?

The QFN10 exposes a thermal pad that must be soldered to a dedicated copper pour connected to ≥4 thermal vias to internal ground planes. With proper layout, junction-to-ambient thermal resistance is 124 °C/W, allowing continuous operation at 100 µA quiescent current without derating - critical for compact, sealed industrial enclosures.

Is TSC214IQT suitable for bidirectional current measurement in a 12 V automotive body control module?

Yes. Tie REF to 2.5 V (e.g., using buffered DAC or precision divider) to set output common-mode at mid-rail. With 100 V/V gain, ±25 mV shunt drop yields ±2.5 V output, compatible with 5 V ADCs. Guaranteed operation from −40 °C to +125 °C and 100 dB CMRR at 100 kHz make it robust against engine bay noise and load dump transients.