TSC199A3IQT

Instrumentation, Op Amps, Buffer Amps Overview

The TSC199A3IQT is a zero-drift current sense amplifier from STMicroelectronics, featuring a fixed gain of 200 V/V. It supports bidirectional high-side and low-side sensing with a wide common-mode voltage range of -0.3 V to 26 V. The device operates on a supply voltage between 2.7 V and 26 V and maintains performance over an industrial temperature range of -40 °C to 125 °C. Key electrical specifications include a maximum offset voltage of ±150 µV, a maximum offset drift of 0.5 µV/°C, and a maximum quiescent current of 100 µA. It is housed in a QFN10L package measuring 1.8 x 1.4 mm.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Zero-drift architecture ensures high precision by minimizing offset voltage and drift errors.
• Wide common-mode voltage range allows operation across various supply voltages without shifting the reference point.
• Bidirectional sensing capability enables accurate current measurement for both sourcing and sinking loads.

Instrumentation, Op Amps, Buffer Amps Applications

• Notebook computers
• Telecom equipment
• Industrial applications
• Power management systems
• Battery chargers

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify that the specific order code matches the required gain configuration, as the TSC199 series includes variants with different gains. Confirm the packaging type corresponds to the tape and reel format indicated by the QT suffix. Ensure the design accounts for the QFN10L thermal characteristics and recommended footprint dimensions provided in the datasheet.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when precise current monitoring is required in space-constrained designs. The 200 V/V gain is suitable for detecting small differential voltages across shunt resistors. Consider the low quiescent current for battery-powered applications and the wide common-mode range for flexible circuit placement relative to ground.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the TSC199 family of zero-drift current sense amplifiers. Other members include TSC199A1 (50 V/V) and TSC199A2 (100 V/V). The family shares identical pinouts and general electrical characteristics, differing primarily in internal gain settings. All variants are available in SC70-6 and QFN10L packages.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct substitutes within the same family include TSC199A1ICT, TSC199A1IQT, TSC199A2ICT, and TSC199A2IQT. These parts share the same package and pinout but offer different gains (50 V/V or 100 V/V). Verify that the system gain requirements align with the replacement's specified gain value.

Instrumentation, Op Amps, Buffer Amps FAQ

What is the maximum capacitive load the TSC199A3IQT can drive?

The device can drive a maximum capacitive load of 470 pF without sustained oscillation.

How does the TSC199A3IQT handle input currents if the voltage exceeds the supply?

Input voltage can go beyond the supply voltage, but the input current must be limited to 5 mA. Using a serial resistor with the input is highly recommended in such cases.