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ADCMP551,pdf datasheet (LVPECL
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大小:352 |
2009-08-24
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The ADCMP551/ADCMP552/ADCMP553 are single-supply, high speed comparators fabricated on Analog Devices’ proprietary XFCB process. The devices feature a 500 ps propagation delay with less than 125 ps overdrive dispersion. Overdrive 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 and are fully compatible with PECL and 3.3V LVPECL 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 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.
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 and are fully compatible with PECL and 3.3V LVPECL 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 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.
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