ADCMP552

Preliminary Technical Data FEATURES Single Supply High Speed PECL Comparators ADCMP551/ADCMP552/ADCMP553 FUNCTIONAL BLOCK DIAGRAM NONINVERTING INPUT Q OUTPUT Single power supply 750 ps propagation delay input to output 100 ps propagation delay dispersion Differential PECL compatible outputs Differential latch control Internal latch pull-up resistors Power supply rejection greater than 70 dB 750 ps minimum pulse width Equivalent input rise time bandwidth > 750 MHz Typical output rise/fall of 500 ps Programmable Hysteresis INVERTING INPUT ADCMP551/ ADCMP552/ ADCMP553 Q OUTPUT 04722-0-001 LATCH ENABLE INPUT LATCH ENABLE INPUT Figure 1. GENERAL DESCRIPTION The ADCMP551/ADCMP552/ADCMP553 are single supply, high speed comparators fabricated on Analog Devices’ proprietary XFCB process. The devices feature a 750 ps propagation delay with less than 150 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 ADCMP552. A differential input stage permits consistent propagation delay with a common-mode range from –0.2 V to VCCI – 2.0 V. Outputs are complementary digital signals 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 VCCO − 2 V. A latch input is included and permi...