STMicroelectronics introduces high-precision op amps for energy-efficient power conversion applications

     STMicroelectronics introduced the TSV7722 high-precision high-bandwidth operational amplifier, which can achieve a gain bandwidth of 22MHz and a slew rate of 11V/μs, which is very suitable for high-speed signal conditioning and accurate current measurement in power conversion circuits and optical sensors.

     The maximum input offset voltage of 200µV (typ. 50µV at 25°C), combined with the ultra-low input voltage noise density of 7nV/√Hz, allows the TSV7722 to accurately measure low-side current. In addition, the 2pA typical input bias current allows the TSV7722 to accurately measure photodiode current in photoelectric sensing applications such as smoke detectors. The TSV7722 is a unity-gain stable amplifier that can drive capacitive loads up to 47pF and is used as an input buffer in an analog-to-digital converter (ADC).

     The TSV7722 operates from a voltage range of 1.8V-5.5V, and can use the same power supply as low-voltage CMOS devices such as microcontrollers, even from severely low-powered batteries. In addition, the accuracy parameters and temperature stability of the TSV7722 further simplify circuit design, ensuring excellent accuracy without the use of precision resistors or post-assembly adjustments.

     The TSV7722 provides accurate, fast-response current measurement for power conversion systems, improving energy efficiency in applications such as smart automotive systems, solar panels, telecom infrastructure, and computer servers. Vehicle-spec products will be launched in the second half of 2021. The TSV7722 is included in ST's 10-year Product Availability Assurance Program for long-term availability.