Op-amp has low input noise to save energy
Engineered to efficient process a photodetector output signal, the TSV792 saves energy for extra features such as wireless networking that add value to smart-home products, says STMicroelectronics.
The TSV792 dual 5V operational amplifier (op-amp) boosts high speed signal conditioning and current sensing by combining 50MHz gain-bandwidth with low input offset voltage and input voltage noise of just 6.5nV/√Hz.
The typical 50MHz gain-bandwidth product enables accurate amplification of high-frequency signals. The fast slew rate of 30V per microsecond ensures the TSV792 is suited to photodiode-signal conditioning in battery-powered smoke detectors, advises STMicroelectronics.
Typical input offset voltage is 50-microV (at 25 degrees C), enabling the TSV792 to perform low side current sensing in motor control applications and power systems such as industrial power supplies, telecomms and network infrastructure supplies, and renewable energy conversion.
The op-amp can handle an output capacitance up to 1nF and full specification on a load of 22pF to deliver high speed, high precision for filter applications and input buffering of analogue to digital converters (ADCs).
The op-amp also has a maximum input offset voltage specified over the extended temperature range from -40 to +125 degrees C. This allows high measurement accuracy without special external components, such as precision resistors, which reduces the bill of materials cost. Trimming or calibrating circuits during production can also be avoided.
The TSV792 has a wide supply voltage range of 2.2 to 5.5V and can be powered from the same supply as other low voltage digital ICs such as the system host microcontroller. It can also 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, which to allow for a variety of design topologies and simplified circuit designs.
The TSV792 is in ST’s 10-year longevity programme, which guarantees long-term availability for industrial products. It is in production now, in the Mini SO-8 package. A DFN8 2.0 x 2.0mm package version will be available at the beginning of 2021.
