SCAS931G
May 2012 – January 2018
CDCM6208
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
Simplified Schematic
Simplified Schematic
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information, Airflow = 0 LFM
6.5
Thermal Information, Airflow = 150 LFM
6.6
Thermal Information, Airflow = 250 LFM
6.7
Thermal Information, Airflow = 500 LFM
6.8
Single-Ended Input Characteristics (SI_MODE[1:0], SDI/SDA/PIN1, SCL/PIN4, SDO/ADD0/PIN2, SCS/ADD1/PIN3, STATUS1/PIN0, RESETN/PWR, PDN, SYNCN, REF_SEL)
6.9
Single-Ended Input Characteristics (PRI_REF, SEC_REF)
6.10
Differential Input Characteristics (PRI_REF, SEC_REF)
6.11
Crystal Input Characteristics (SEC_REF)
6.12
Single-Ended Output Characteristics (STATUS1, STATUS0, SDO, SDA)
6.13
PLL Characteristics
6.14
LVCMOS Output Characteristics
6.15
LVPECL (High-Swing CML) Output Characteristics
6.16
CML Output Characteristics
6.17
LVDS (Low-Power CML) Output Characteristics
6.18
HCSL Output Characteristics
6.19
Output Skew and Sync to Output Propagation Delay Characteristics
6.20
Device Individual Block Current Consumption
6.21
Worst Case Current Consumption
6.22
Timing Requirements, I2C Timing
6.23
Typical Characteristics
7
Parameter Measurement Information
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Typical Device Jitter
8.3.2
Universal Input Buffer (PRI_REF, SEC_REF)
8.3.3
VCO Calibration
8.3.4
Reference Divider (R)
8.3.5
Input Divider (M)
8.3.6
Feedback Divider (N)
8.3.7
Prescaler Dividers (PS_A, PS_B)
8.3.8
Phase Frequency Detector (PFD)
8.3.9
Charge Pump (CP)
8.3.10
Fractional Output Divider Jitter Performance
8.3.11
Device Block-Level Description
8.3.12
Device Configuration Control
8.3.13
Configuring the RESETN Pin
8.3.14
Preventing False Output Frequencies in SPI/I2C Mode at Start-Up
8.3.15
Input MUX and Smart Input MUX
8.4
Device Functional Modes
8.4.1
Control Pins Definition
8.4.2
Loop Filter Recommendations for Pin Modes
8.4.3
Status Pins Definition
8.4.4
PLL Lock Detect
8.4.5
Interface and Control
8.4.5.1
Register File Reference Convention
8.4.5.2
SPI - Serial Peripheral Interface
8.4.5.2.1
Writing to the CDCM6208
8.4.5.2.2
Reading From the CDCM6208
8.4.5.2.3
Block Write/Read Operation
8.4.5.2.4
I2C Serial Interface
8.5
Programming
8.6
Register Maps
9
Application and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
Design Requirements
9.2.2
Detailed Design Procedures
9.2.2.1
Jitter Considerations in SERDES Systems
9.2.2.2
Jitter Considerations in ADC and DAC Systems
9.2.2.3
Configuring the PLL
9.2.2.4
Programmable Loop Filter
9.2.2.5
Loop filter Component Selection
9.2.2.6
Device Output Signaling
9.2.2.7
Integer Output Divider (IO)
9.2.2.8
Fractional Output Divider (FOD)
9.2.2.9
Output Synchronization
9.2.2.10
Output Mux on Y4 and Y5
9.2.2.11
Staggered CLK Output Power Up for Power Sequencing of a DSP
10
Power Supply Recommendations
10.1
Power Rail Sequencing, Power Supply Ramp Rate, and Mixing Supply Domains
10.1.1
Mixing Supplies
10.1.2
Power-On Reset
10.1.3
Slow Power-Up Supply Ramp
10.1.4
Fast Power-Up Supply Ramp
10.1.5
Delaying VDD_Yx_Yy to Protect DSP IOs
10.2
Device Power-Up Timing
10.3
Power Down
10.4
Power Supply Ripple Rejection (PSRR) versus Ripple Frequency
11
Layout
11.1
Layout Guidelines
11.2
Reference Schematics
12
Device and Documentation Support
12.1
Documentation Support
12.1.1
Related Documentation
12.2
Receiving Notification of Documentation Updates
12.3
Community Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RGZ|48
MPQF123F
Thermal pad, mechanical data (Package|Pins)
RGZ|48
QFND014T
Orderable Information
scas931g_oa
scas931g_pm
11.2
Reference Schematics
Figure 66.
Schematic Page 1
Figure 67.
Schematic Page 2
Figure 68.
Schematic Page 3
Figure 69.
Schematic Page 4