GENERAL DESCRIPTION
The ADCMP561/ADCMP562 are high speed comparators fabricated on Analog Devices’ proprietary XFCB process. The devices feature a 700 ps propagation delay with less than 75 ps overdrive dispersion. Dispersion, a measure of the difference in propagation delay under differing overdrive conditions, is a particularly important characteristic of comparators. A separate programmable hysteresis pin is available on the ADCMP562.
A differential input stage permits consistent propagation delay with a wide variety of signals in the common-mode range from −2.0 V to +3.0 V. Outputs are complementary digital signals that are fully compatible with PECL 10 K and 10 KH logic families. The outputs provide sufficient drive current to directly drive transmission lines terminated in 50 Ω to VDD − 2 V. A latch input, which is included, permits tracking, track-and-hold, or sample-and-hold modes of operation. The latch input pins contain internal pull-ups that set the latch in tracking mode when left open.
The ADCMP561/ADCMP562 are specified over the industrial temperature range (−40°C to +85°C).

FEATURES
  Differential PECL compatible outputs
  700 ps propagation delay input to output
  75 ps propagation delay dispersion
  Input common-mode range: –2.0 V to +3.0 V
  Robust input protection
  Differential latch control
  Internal latch pull-up resistors
  Power supply rejection greater than 85 dB
  700 ps minimum pulse width
  1.5 GHz equivalent input rise time bandwidth
  Typical output rise/fall time of 500 ps
  ESD protection > 4kV HBM, >200V MM
  Programmable hysteresis

APPLICATIONS
  Automatic test equipment
  High speed instrumentation
  Scope and logic analyzer front ends
  Window comparators
  High speed line receivers
  Threshold detection
  Peak detection
  High speed triggers
  Patient diagnostics
  Disk drive read channel detection
  Hand-held test instruments
  Zero-crossing detectors
  Line receivers and signal restoration
  Clock drivers