STMicroelectronics TSC1031IPT

Overview

TSC1031IPT from STMicroelectronics is a high-voltage, high-side current sense amplifier with independent supply and input common-mode voltage domains, 50 V/V or 100 V/V pin-selectable gain, buffered ground-referenced output, and operation across -40 °C to +125 °C - used for precision shunt-based current monitoring in automotive battery management and photovoltaic string monitoring.

For engineers reviewing the TSC1031IPT datasheet, TSC1031IPT pinout, TSC1031IPT application, or TSC1031IPT equivalent, this page delivers verified electrical parameters, validated dual-supply configuration behavior, real-world EMI filtering implementation guidance, and accurate gain-switching timing characteristics - all critical for high-reliability power path sensing in 12–70 V systems.

Technical Context

The TSC1031 implements a two-stage current multiplier architecture: differential input current through Rg1 is scaled by K2 (2.5 or 5) and mirrored into Rg3 (K1 = 10), yielding total gain Av = 2·K1·K2 = 50 or 100 V/V. Its input stage operates with zero DC bias current on Vp/Vm, enabling ultra-low error in high-impedance shunt networks.

Common-mode rejection is achieved via dedicated high-voltage input transistors referenced to Vcc−, supporting true single-supply operation (2.9–70 V Vicm at Gnd-referenced Vcc−) or dual-supply offset (e.g., −2.1 to 65 V with Vcc− = −5 V). Output settling time is 6 μs (Av = 50) or 10 μs (Av = 100) to 1% with 47 pF load, and SEL pin response is <1 μs.

Key Specifications

Pinout & Package

TSC1031IPT uses a TSSOP-8 plastic package (8-pin, 3 mm × 4.4 mm, 0.65 mm pitch), optimized for thermal performance (R_thJA = 120 °C/W) and PCB space-constrained high-voltage applications.

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, TSC1031IPT uniquely balances ultra-low ICC (360 μA), dual-gain configurability, and 70 V Vicm in TSSOP-8 - making it optimal for space- and power-constrained automotive and renewable energy systems requiring flexible full-scale ranges.

Availability

TSC1031IPT is available at Aetrix Electronics and suitable for automotive battery management, photovoltaic string monitoring, and uninterruptible power supply designs requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for TSC1031IPT 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 automotive, industrial, and consumer markets.

TSC1031 belongs to ST's high-voltage precision analog portfolio, engineered specifically for robust current sensing in harsh automotive and industrial environments where wide common-mode range, low power, and EMI resilience are mandatory.

FAQ

What is the maximum survivable common-mode voltage for TSC1031IPT?

The TSC1031IPT withstands −16 V to +75 V on Vp and Vm pins relative to Vcc−, covering reversed-battery (−16 V) and load-dump (up to +75 V) conditions per ISO 7637-2. This rating applies regardless of Vcc+ supply voltage and is validated across −40 °C to +125 °C junction temperature.

How does the SEL pin configure gain, and what logic levels are required?

The SEL pin selects gain: grounded (≤0.5 V) sets Av = 50 V/V; connected to Vcc+ (≥1.2 V) sets Av = 100 V/V. Input leakage is ≤400 nA, allowing direct MCU GPIO control without pull-up/down resistors. Transition settling time is <1 μs, enabling real-time gain switching during current profiling.

Can TSC1031IPT operate with Vcc− floating or unconnected?

No. Vcc− must be either tied to Gnd (single-supply mode) or connected to a defined negative supply (dual-supply mode). Leaving Vcc− floating violates absolute maximum ratings and risks latch-up. The datasheet specifies Vcc− = 0 V (Gnd) for single-supply operation and −8 to 0 V for dual-supply configurations with Vcc+ = 5.5 V max.

What is the recommended input filter configuration for EMI suppression?

Per AN4304, use Rf1 = Rf2 = 10 Ω and Cf = 100 nF between Vp/Vm and the shunt resistor - forming a 160 kHz low-pass filter that attenuates high-frequency switching noise from adjacent MOSFETs or inverters while preserving <1% gain error at 10 kHz signal bandwidth.