CS2000CP-DZZ Cirrus Logic Inc, CS2000CP-DZZ Datasheet - Page 12
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CS2000CP-DZZ
Manufacturer Part Number
CS2000CP-DZZ
Description
IC General Purpose PLL Crystal
Manufacturer
Cirrus Logic Inc
Type
Fractional N Synthesizerr
Datasheet
1.CS2000CP-CZZ.pdf
(36 pages)
Specifications of CS2000CP-DZZ
Pll
Yes
Input
Clock
Output
Clock
Number Of Circuits
1
Ratio - Input:output
2:2
Differential - Input:output
No/No
Frequency - Max
75MHz
Divider/multiplier
Yes/Yes
Voltage - Supply
3.1 V ~ 3.5 V
Operating Temperature
-10°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Frequency-max
75MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
598-1572 - KIT EVAL PROTOTYPING CS2300-CP598-1571 - KIT EVAL PROTOTYPING CS2000-CP598-1493 - BOARD EVAL GEN PURPOSE PLL DC598-1492 - BOARD EVAL GEN PURPOSE PLL DC598-1490 - BOARD EVAL GEN PURPOSE PLL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
12
4.2.1
Fractional-N Source Selection for the Frequency Synthesizer
The fractional-N value for the frequency synthesizer can be sourced from either a static ratio or a dynamic
ratio generated from the digital PLL (see
static ratio based Frequency Synthesizer Mode as a simple frequency synthesizer (for frequency gener-
ation from the Timing Reference Clock) and in the dynamic ratio based Hybrid PLL Mode (for jitter reduc-
tion and clock multiplication). Selection between these two modes can either be made automatically
based on the presence of the Frequency Reference Clock or manually through register controls.
.
Frequency Reference Clock
Timing Reference Clock
Output to Input Ratio for Synthesizer Mode
Frequency Reference
Timing Reference
Clock
Clock
Figure 6. Fractional-N Source Selection Overview
Delta-Sigma Fractional-N Frequency Synthesizer
Digital PLL and Fractional-N Logic
Output to Input ratio for Hybrid Mode
Figure 5. Hybrid Analog-Digital PLL
Digital PLL & Fractional-N Logic
Comparator
Phase
Output to Input Ratio for Hybrid mode
Figure
Frac-N Generation
Comparator for
Delta-Sigma
Fractional-N
Digital Filter
Loop Filter
Frequency
Modulator
Internal
Divider
N
6). This allows for the selection between operating in the
Frequency Synthesizer
Fractional-N
Voltage Controlled
N
Oscillator
PLL Output
PLL Output
CS2000-CP
DS761PP1