Dual High Speed ECL Comparator 20 - Lead QSOP

The ADCMP563/ADCMP564 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 high speed comparators. A separate programmable hysteresis pin is available on the ADCMP564.

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 ECL 10 K and 10 KH logic families. The outputs provide sufficient drive current to directly drive transmission lines terminated in 50 Ω to −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 ADCMP563/ADCMP564 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

* Hand-held test instruments

* Zero crossing detectors

* Line receivers and signal restoration

* Clock drivers

* Differential ECL-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