High bandwidth op amp is power-conscious

The TSV7722 precision, high bandwidth, operational amplifier has a gain bandwidth of 22MHz and slew rate of 11V per microsecond. It is suitable for high speed signal conditioning and accurate current measurement in power conversion circuits and optical sensors, said STMicroelectronics.

The maximum input-offset voltage of 200 microV (typical 50 microV at 25 degrees C) and extremely low input voltage noise density of 7nV/√Hz permit accurate low side current measurements. The typical input bias current of 2pA enables accurate photodiode current measurement in optical sensing applications such as smoke detectors. Unity gain stable, and fully specified on a load of 47pF, the op amp can be used as an input buffer for ADCs.

An operating voltage ranging from 1.8 to 5.5V means the TSV7722 can be powered from the same supply as low voltage CMOS components (e.g a microcontroller), or from a deeply discharged battery. The precision parameters and stability over temperature simplify circuit design, ensuring outstanding accuracy without precision resistors or trimming after assembly, said ST.

Accurate and responsive current measurements for power conversion systems enhances energy efficiency in applications such as automotive smart mobility, solar panels, telecomms infrastructure and computer servers.

Automotive-qualified devices will be available in the second half of 2021.

The TSV7722 is included in ST’s 10-year longevity program that assures long-term component supply. It is in production now in MiniSO8 and DFN8 packages.


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