STMicroelectronics TSC101BILT

Overview

TSC101BILT from STMicroelectronics is a high-side current sense amplifier with internally fixed 50 V/V gain, operating from 4–24 V supply and supporting 2.8–30 V input common-mode voltage independent of V_CC. It delivers ±0.9 mV max input offset voltage, 105 dB CMR, and 3 µs output settling time in SOT23-5 package. Used for precision DC motor current monitoring where shunt voltage must be translated to ground-referenced output without disturbing power rail integrity.

For engineers reviewing the TSC101BILT datasheet, TSC101BILT pinout, TSC101BILT application, or TSC101BILT equivalent, key selection criteria include its 50 V/V fixed gain, -40°C to +125°C automotive-grade operation, 300 µA max supply current, and ability to sense current at common-mode voltages up to 30 V while powered from a lower V_CC.

Technical Context

The TSC101BILT implements a high-side sensing architecture using an internal current mirror and precision resistor ratio to achieve 50 V/V gain without external components. Its input stage operates independently of V_CC, enabling measurement on 24 V battery rails while powered from a 5 V microcontroller supply.

It features buffered analog output with 1 mA load capability, 0.4 mV/°C output drift, and 500 kHz small-signal bandwidth. Absolute maximum survival at 60 V common-mode (load-dump) and ESD robustness (2.5 kV HBM) support harsh automotive environments.

Key Specifications

Pinout & Package

SOT23-5L plastic package (ECOPACK® compliant), 2.9 mm × 2.8 mm × 1.3 mm body, 0.95 mm pitch, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4080TASA+ and INA240A1D, the TSC101BILT offers optimal balance of 50 V/V fixed gain, 300 µA supply current, SOT23-5 size, and AEC-Q100 qualification - making it ideal for space-constrained automotive and industrial current loops requiring minimal BOM count.

Availability

TSC101BILT is available at Aetrix Electronics and suitable for automotive battery monitoring, DC motor control feedback, photovoltaic string monitoring, and battery charger current sensing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TSC101BILT 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

The TSC101 series belongs to ST's precision analog portfolio, engineered specifically for high-side current sensing in harsh environments where supply independence, low power, and automotive reliability are mandatory.

FAQ

What is the maximum allowable differential input voltage (Vsense) for TSC101BILT?

The absolute maximum differential input voltage (Vp − Vm) is ±60 V, but the recommended operating range is ±100 mV to maintain linearity and accuracy within datasheet specifications. At ±100 mV input, total output voltage accuracy is ±5% over temperature, ensuring reliable current measurement resolution down to 2 mA with a 50 mΩ shunt.

Can TSC101BILT operate with Vcc lower than the input common-mode voltage?

Yes - the TSC101BILT is explicitly designed for this condition. Its input stage operates independently of V_CC, allowing Vp/Vm to sit at 24 V while V_CC is supplied from a 5 V rail. This eliminates need for level shifters or isolated supplies in high-side sensing topologies.

Is there a pin-compatible alternative with higher gain accuracy?

No pin-compatible ST part offers better than ±4.5% gain accuracy over temperature. The TSC101BILT's ±4.5% ΔAv is inherent to its trimmed internal resistor ratio. For tighter gain tolerance, consider discrete instrumentation amplifier designs - but these increase PCB area, cost, and calibration complexity.

Does TSC101BILT require external filtering on the Out pin?

No external RC filter is required for basic operation. However, a 47 pF capacitor is recommended at the output per datasheet stability guidelines. Larger capacitors (>100 pF) degrade phase margin and may cause oscillation due to the internal output stage's limited drive strength.