The ADCMP561/ADCMP562 are high speed comparators fabricated on Analog Devices, Inc., 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 Vto +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).

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

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.