Fast Signal Conditioning and Current Sensing with Precision Op Amp


The device has a range of characteristics that makes it suitable for applications from industrial to signal filtering

Combining 50MHz gain-bandwidth with precision attributes including low input offset voltage and low input voltage noise of just 6.5nV/√Hz is the TSV792 dual 5V operational amplifier (op-amp) that also has a 50MHz gain-bandwidth, enabling accurate amplification of high-frequency signals.

With a fast slew rate of 30V/µs, the TSV792 is suitable for photodiode-signal conditioning in battery-powered smoke detectors. The device’s efficient processing of the photodetector output signal allows it to save energy for features such as wireless networking.

An input offset voltage of 50µV (at 25 degrees Celsius) makes the TSV792 perform accurate low-side current sensing in motor-control applications and power systems such as industrial power supplies, telecom and network infrastructure supplies, and renewable-energy conversion.

At the same time, its ability to handle an output capacitance of up to 1nF and full specification on a load of 22pF makes it a high-speed, high-precision solution for filter applications and input buffering of analogue-to-digital converters (ADCs).

High measurement accuracy is achieved with maximum input offset voltage over a temperature range from -40 degrees Celsius to 125 degrees Celsius without the addition of external components such as precision resistors that increase BOM cost. Trimming or calibrating circuits during production can also be avoided.

A wide supply-voltage range, from 2.2V to 5.5V makes the TSV792 to be powered from the same supply as other low-voltage digital ICs such as the system host MCU and can run from a deeply discharged battery to extend equipment runtime. The op-amp is unity-gain stable and benefits from rail-to-rail input and output, permitting a wide variety of design topologies and simplified circuit designs.

The TSV792 is in production now in the Mini SO-8 package. The DFN8 2mm x 2mm package will be available from STMicroelectronics at the beginning of 2021. 


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