STMicroelectronics TSC102IPT

Overview

TSC102IPT from STMicroelectronics is a high-side current sense amplifier with integrated signal conditioning amplifier, designed for precision shunt-based current monitoring in systems where input common-mode voltage exceeds supply rail. It features 20 V/V fixed gain, ±2.3 mV input offset voltage, -40 °C to 125 °C operation, and 4 kV HBM ESD protection on Vp/Vm pins - enabling use in automotive battery monitoring and photovoltaic string current sensing.

For engineers reviewing the TSC102IPT datasheet, TSC102IPT pinout, TSC102IPT application, or TSC102IPT equivalent, this device supports high-side sensing up to 30 V common-mode while operating from 3.5–5.5 V supply, delivers <420 µA quiescent current, and provides dual-stage amplification (current sense + fully accessible op-amp) for configurable signal conditioning in DC motor control and UPS feedback loops.

Technical Context

The TSC102IPT integrates two independent functional blocks: a high-voltage current sense amplifier (CSA) with 2.8–30 V input common-mode range and a standalone signal conditioning amplifier (SCA) with rail-to-rail output, both sharing a single 3.5–5.5 V supply. The CSA achieves 100 dB DC CMRR and 85 dB SVRR, while the SCA offers 1 MHz GBP, 70–95 dB CMRR, and ±4.5 mV input offset over temperature.

Its architecture enables direct high-side sensing without level-shifting circuitry: Vp and Vm tolerate -16 V to +60 V transients (reversed battery/load dump), and the A1/A2/A3 terminals allow flexible gain adjustment, filtering, or overcurrent detection via external resistors and capacitors - as validated in Figures 22–26 of the datasheet.

Key Specifications

Pinout & Package

TSC102IPT uses the TSSOP8 (Thin Shrink Small Outline Package, 8-lead) with 0.65 mm pitch, 3.0 mm × 6.4 mm body, and exposed thermal pad (not electrically connected). This package supports high-density PCB layouts and meets ECOPACK® environmental compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR and TSC101IPT, the TSC102IPT uniquely combines high-voltage ruggedness, ultra-low quiescent current, and an integrated signal conditioning amplifier - making it optimal for space-constrained, battery-aware automotive and renewable energy systems requiring both precision sensing and flexible post-processing.

Availability

TSC102IPT is available at Aetrix Electronics and suitable for automotive battery monitoring, photovoltaic string monitoring, DC motor control feedback, and uninterruptible power supply sensing requiring stable component supply across extended temperature and high-reliability environments.

Supply support for TSC102IPT 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 TSC102 belongs to ST's precision analog current sensing product line, engineered specifically for high-side shunt measurement in harsh environments - emphasizing ruggedness, low power, and design flexibility through integrated signal conditioning.

FAQ

What is the maximum common-mode voltage the TSC102IPT can survive during transient conditions?

The TSC102IPT survives -16 V to +60 V on Vp and Vm pins under abnormal conditions such as reversed battery or load-dump events. This rating is distinct from its 2.8–30 V operating common-mode range and is verified per IEC 61000-4-5 surge immunity guidelines. No external protection diodes are needed for standard 12 V/24 V automotive systems.

Can the signal conditioning amplifier be configured as a comparator?

Yes - the A2/A3/Out terminals support open-loop comparator operation. With A2 tied to a reference voltage and A3 to the CSA output (A1), the device delivers rail-to-rail output swing and 0.4 V/µs slew rate. However, propagation delay is not characterized in the datasheet, so timing-critical applications require empirical validation.

Does the TSC102IPT require external compensation when used with capacitive loads?

No external compensation is needed for loads ≤100 pF, as confirmed by Figure 17's Bode plot showing 65° phase margin at 1 MHz GBP. For larger capacitive loads (e.g., long traces or ADC input capacitance >100 pF), a series resistor (10–100 Ω) between Out and the load is recommended to maintain stability per Section 7 application examples.

How does the TSC102IPT handle input bias current variation with temperature?

Input bias current on Vp and Vm pins varies from ±5 µA to ±7 µA over -40 °C to 125 °C (Table 5), with typical values below 1 µA at 25 °C. This low, well-bounded bias minimizes offset error in high-value shunt applications (e.g., 100 mΩ+), and Figures 6–7 confirm monotonic behavior across temperature - enabling predictable calibration.