20-MHz op amp delivers high accuracy, space savings

STMicroelectronics has added the TSV772 dual operational amplifier (op amp) to its 5-V family. The new 20-MHz op amp delivers high accuracy, low power consumption, and the option of a small 2 × 2-mm DFN8 package.

Joining the dual-channel 50-MHz TSV792 and 22-MHz TSV7722 op amps, the TSV772 features rail-to-rail inputs and outputs and 20-MHz gain-bandwidth (GBW), and it is unity-gain stable. It also offers a slew rate of 13 V/µs, 7 nV/√Hz input noise density, and 4 kV ESD capability (HBM). It operates over an extended temperature range of -40°C to 125°C

The maximum input-offset voltage of 200 µV (at 25°C) ensures accurate handling of low-amplitude signals, said ST. In addition, with the inherent accuracy it also saves on precision external resistors and helps avoid trimming or calibrating circuits in production, added the company.

The TSV772 is characterized for an output capacitance of 47 pF, which simplifies use as an A/D converter input buffer. The op amp, capable of operating from a supply voltage as low as 2 V (2 V to 5.5 V), can be connected to the same rail as a low-power microcontroller to simplify design. “The low minimum voltage also allows longer operation with a deeply discharged battery,” said ST.

The TSV772 is suited for applications such as smoke detectors and in power conversion applications such as solar generators, telecom infrastructure equipment, and computer servers.

The TSV772 is in production and is available in SO-8 and MiniSO-8 packages, as well as the miniature DFN8. The device is in a free-sample program and can be ordered at the ST eSTore. Prices start from $0.73 for orders of 1000 units.