STMicroelectronics has released a new high-bandwidth operational amplifier which offers useful characteristics for high-speed signal conditioning and accurate current measurement in power-conversion circuits and optical sensors. The TSV7722 features gain-bandwidth of 22 MHz and a slew rate of 11 V/μs.
A maximum input-offset voltage of 200 µV and very low input-voltage noise density of 7 nV/√Hz enable accurate low-side current measurements to be performed. In addition, the typical input bias current of 2 pA is low enough to provide for accurate photodiode-current measurement in optical sensing applications such as smoke detectors.
By providing accurate and responsive current measurements, the TSV7722 enhances energy efficiency in power-conversion systems.
Unity-gain stable, and fully specified on a load of 47 pF, the TSV7722 can also be used as an input buffer for ADCs.
Operating from an input-voltage range of 1.8 V to 5.5 V, the TSV7722 can be powered from the same supply as low-voltage CMOS components such as microcontrollers, or from a deeply discharged battery. Moreover, the TSV7722 precision parameters and stability over temperature simplify circuit design by maintaining outstanding accuracy without precision resistors or trimming after assembly.
The TSV7722 is included in the ST 10-year longevity program for long-term component supply.