OPA688

® OPA 688 OPA688 OPA 688 For most current data sheet and other product information, visit www.burr-brown.com Unity Gain Stable, Wideband VOLTAGE LIMITING AMPLIFIER TM FEATURES q q q q q q q HIGH LINEARITY NEAR LIMITING FAST RECOVERY FROM OVERDRIVE: 2.4ns LIMITING VOLTAGE ACCURACY: ±15mV –3dB BANDWIDTH (G = +1): 530MHz SLEW RATE: 1000V/µs ±5V AND 5V SUPPLY OPERATION HIGH GAIN VERSION: OPA689 APPLICATIONS q q q q q q q q FAST LIMITING ADC INPUT BUFFER CCD PIXEL CLOCK STRIPPING VIDEO SYNC STRIPPING HF MIXER IF LIMITING AMPLIFIER AM SIGNAL GENERATION NON-LINEAR ANALOG SIGNAL PROCESSING COMPARATOR DESCRIPTION The OPA688 is a wideband, unity gain stable voltage feedback op amp that offers bipolar output voltage limiting. Two buffered limiting voltages take control of the output when it attempts to drive beyond these limits. This new output limiting architecture holds the limiter offset error to ±15mV. The op amp operates linearly to within 30mV of the output limit voltages. The combination of narrow nonlinear range and low limiting offset allows the limiting voltages to be set within 100mV of the desired linear output range. A fast 2.4ns recovery from limiting ensures that overdrive signals will be transparent to the signal channel. Implementing the limiting function at the output, as opposed to the input, gives the specified limiting accuracy for any gain, and allows the OPA688 to be used in all standard op amp applications. Non-linear analog signal processing will benefit...