Fast CMOS Op Amps for Video Processing

On Friday, Texas Instruments announced a new series of CMOS operational amplifiers, featuring 200-MHz gain-bandwidth and 360-V/us slew rate. TI expects the new op amps to be used in apps that include video processing, ultrasound, optical networking, photodiode transimpedance amplifier, communications, and analog-to-digital converter input buffering. These voltage-feedback devices are unity-gain stable and can drive an output current of +/-100-mA. Bandwidth in unity gain is 450-MHz. All versions (single, dual, and triple) feature a digital shutdown function which provides power savings during idle periods and places the output in a high-impedance state to support output multiplexing. The OPA355 family is optimized for operation on single or dual supplies, as low as 2.5-V (+/-1.25-V) and up to 5.5-V (+/-2.75-V). Common-mode input range extends 100-mV below ground and up to 1.5-V from positive supply. Output swing is within 100-mV of the rails. Other features include low noise (5.8-nV/rt-Hz), low input bias current (3-pA), and low quiescent current (8.3-mA per channel). The OPA355 (single) is available in SOT23-6 and SO-8 packages starting at $1.19 in 1,000 piece quantities. The OPA3355 (triple) is packaged in a TSSOP-14 and SO-14 for $2.79 in 1,000 piece quantities. The dual OPA2355 won't be available until Q3 of this year.