CDC960 Datasheet, PDF (35/38 Pages) Texas Instruments – 200-MHz CLOCK SYNTHESIZER/DRIVER WITH SPREAD SPECTURM CAPABILITY AND DEVICE CONTROL INTERFACE

CDC960
200ĆMHz CLOCK SYNTHESIZER/DRIVER
WITH SPREAD SPECTRUM CAPABILITY AND DEVICE CONTROL INTERFACE
SCAS675 – APRIL 2002
PARAMETER MEASUREMENT INFORMATION
The differential voltage is measured single-ended and is the result of the following calculation:
Vod_(t) = Vo(CPUx)_(t) – Vo(CPUx)_(t)
CPUx _Vo(Max)
tw(l)
tw(h)
CPUx
Vdif
Vo(Min)
0 V (GND)
|Vdif(Max)|
|Vdif|
|Vdif(Min)|
Avg.
Avg.
Vod_0
Vod_1
0 V (GND)
45%
of
t_w(l)
45%
of
t_w(h)
75%
of
t_w(l)
75%
of
t_w(h)
Vod_0 is calculated from the average of Vod within 45%–75% (region without switching noise) of the pulse while CPUx is in the
LOW state.
Vod_1 is calculated from the average of Vod within 45%–75% (region without switching noise) of the pulse while CPUx is in the
HIGH state.
Vod = (Vod_0 + Vod_1/2
∆Vod_DC = Vod_0 – Vod_1
∆Vod_AC = |Vdif(max0| – |Vdif(min)|
Figure 13. Differential Output Voltage
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
35