STMicroelectronics TSC1031ID

Overview

TSC1031ID from STMicroelectronics is a high-voltage, high-side current sense amplifier designed for precision shunt-based current monitoring in automotive and industrial power systems. It operates with independent supply and input common-mode voltages, supports 50 V/V or 100 V/V pin-selectable gain, delivers buffered ground-referenced output, and withstands -16 V to 75 V common-mode survival range - enabling robust use in battery reverse-connection and load-dump conditions.

For engineers reviewing the TSC1031ID datasheet, TSC1031ID pinout, TSC1031ID application, or TSC1031ID equivalent, key selection criteria include its 2.9–70 V single-supply common-mode range, 360 μA max supply current, ±1100 μV max input offset voltage over temperature, TSSOP8 package compatibility, and dual-supply configurability via Vcc− pin.

Technical Context

The TSC1031ID implements a current-multiplier architecture with internal Rg1/Rg2 = 5 kΩ resistors and fixed K1 = Rg3/Rg1 = 10, yielding total gains of 50 V/V (SEL = GND) or 100 V/V (SEL = Vcc+). Its input stage rejects common-mode transients via dedicated EMI filtering paths using external Rf1/Rf2/Cf networks.

It features fully independent Vcc+ and Vcc− supplies, allowing dual-supply operation where Vicm shifts with Vcc− (e.g., −2.1 V to 65 V with Vcc+ = 5 V, Vcc− = −5 V). The output stage includes a unity-gain voltage buffer with ±10 mA drive capability and 85–135 mV saturation voltage under 1 mA load.

Key Specifications

Pinout & Package

Package: TSSOP8 (plastic, 3 × 3 mm, 0.65 mm pitch), RoHS-compliant, rated for −40 °C to 125 °C operating temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4080TASA+ and INA240A1D, the TSC1031ID uniquely combines pin-selectable gain, ultra-low ICC, and dual-supply Vicm configurability - making it optimal for space-constrained, multi-voltage automotive modules requiring flexible full-scale calibration.

Availability

TSC1031ID is available at Aetrix Electronics and suitable for automotive current monitoring, DC motor control, photovoltaic systems, and battery charger designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-aligned performance.

Supply support for TSC1031ID 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, delivering silicon solutions for automotive, industrial, and power management applications.

The TSC1031ID belongs to ST's high-voltage precision analog portfolio, engineered specifically for ruggedized current sensing in harsh electrical environments - including automotive power distribution, industrial motor drives, and renewable energy interfaces.

FAQ

What is the maximum allowable common-mode voltage for TSC1031ID in single-supply configuration?

The TSC1031ID supports a common-mode operating range of 2.9 V to 70 V when configured in single-supply mode (Vcc− tied to GND). Its common-mode *survival* range extends to −16 V to 75 V, meaning it withstands transient overvoltages beyond normal operation - such as load-dump events in automotive 12 V systems - without damage or latch-up.

How does the SEL pin affect gain and what logic levels are valid?

The SEL pin selects total gain: grounded (≤0.5 V) sets 50 V/V; connected to Vcc+ (≥1.2 V) sets 100 V/V. Input leakage is ≤400 nA, allowing direct interface with microcontroller GPIOs. Logic thresholds are specified across full temperature range (−40 °C to 125 °C) and supply (2.7–5.5 V), ensuring reliable operation without external level-shifting.

Can TSC1031ID be used in dual-supply mode, and how does Vcc− impact performance?

Yes - disconnecting Vcc− from GND and applying a negative voltage (e.g., −5 V) shifts the common-mode range downward (e.g., −2.1 V to 65 V), enabling bidirectional current sensing in applications like regenerative braking. Vcc− must remain within −8 V to 0 V (at Vcc+ = 5.5 V) and |Vcc+ − Vcc−| ≤ 15 V per absolute maximum ratings.

What is the output stage's drive capability and how does it interface with an ADC?

The buffered output drives ±10 mA with <135 mV saturation voltage at 1 mA load. It is fully rail-to-rail capable (0.085 V to Vcc−0.085 V) and exhibits ±1.5 mV/mA load regulation - enabling direct connection to 12-bit+ SAR ADCs without external op-amp buffering. Output impedance is <1 Ω, minimizing noise pickup in PCB traces.