CS2000CP-CZZ Cirrus Logic Inc, CS2000CP-CZZ Datasheet - Page 12

• Manufacturer Part Number: CS2000CP-CZZ
• Description: IC General Purpose PLL Crystal
• Manufacturer: Cirrus Logic Inc
• Type: Fractional N Synthesizerr

Specifications of CS2000CP-CZZ

• 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
• Other names: 598-1748; CS2000CP-CZZ

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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