Wideband voltage-feedback operational amplifier with disable

The OPA690 device represents a major step forward

in unity-gain stable, voltage-feedback op amps. A new input architecture provides

slew rate and full-power bandwidth previously found only in wide-band,

current-feedback op amps. A new output stage architecture delivers 215mA of current

with a minimal headroom requirement. These capabilities combine to give exceptional

slew rate of 1900V/µs into a 100Ω load. The ultra-fast settling time of 13ns makes

the OPA690 an excellent choice for fast sampling systems such as high-speed ADC

drivers, high-speed imaging systems, and current DAC transimpedance amplifier.

The low quiescent current of 6.1mA makes the

OPA690 an excellent choice in portable or battery-powered application. System power

can be reduced further using the optional disable control pin

(DIS). Leaving DIS open, or holding

DIS high, operates the OPA690 normally. If

DIS is pulled low, the OPA690 supply current drops to less

than 100µA while the output goes to a high-impedance state.