CDC7005

3.3V HIGH PERFORMANCE CLOCK SYNTHESIZER AND JITTER CLEANER

SCAS685E − DECEMBER 2002 − REVISED NOVEMBER 2004

21

POST OFFICE BOX 655303

APPLICATION INFORMATION

Another advantage of this clock solution is that the ADC or DAC can be driven directly in an ac-coupling interface

as shown in Figure 9, with an external termination in a differential configuration. There is no need for a

transformer to generate a differential signal from a single-ended clock source.

CLK1

RT

50

Ω

PECL

Output

VIT

RT

50

Ω

CLK1C

DAC

Figure 9. Driving DAC or ADC with PECL Output of the CDC7005