ADCMP565

Dual Ultrafast Voltage Comparator ADCMP565 FEATURES 300 ps propagation delay input to output 50 ps propagation delay dispersion Differential ECL compatible outputs Differential latch control Robust input protection Input common-mode range −2.0 V to +3.0 V Input differential range ±5 V Power supply sensitivity greater than 65 dB 200 ps minimum pulsewidth 5 GHz equivalent input rise time bandwidth Typical output rise/fall of 160 ps SPT 9689 replacement FUNCTIONAL BLOCK DIAGRAM NONINVERTING INPUT INVERTING INPUT Q OUTPUT ADCMP565 Q OUTPUT LATCH ENABLE INPUT LATCH ENABLE INPUT 02820-0-001 Figure 1. GENERAL DESCRIPTION The ADCMP565 is an ultrafast voltage comparator fabricated on Analog Devices’ proprietary XFCB process. The device features 300 ps propagation delay with less than 50 ps overdrive dispersion. Overdrive dispersion, a particularly important characteristic of high speed comparators, is a measure of the difference in propagation delay under differing overdrive conditions. A fast, high precision 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 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 is included, which permits tracking, track-and-hold, or sample-and-hold modes of operation. The ADCMP565 is availa...