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SCAS685E − DECEMBER 2002 − REVISED NOVEMBER 2004
TERMINAL ASSIGNMENTS
(TOP VIEW)
D
D
D
High Performance 1:5 PLL Clock
Synchronizer
1
2
3
4
5
6
7
8
Two Clock Inputs: VCXO_IN Clock Is
Synchronized to REF_IN Clock
CTRL_
CLK
CTRL_
DATA
STATUS_
CP_OUT OPA_IN OPA_IP OPA_OUT
LOCK
A
CTRL_LE
REF_IN
Synchronizes Frequencies up to 800 MHz
(VCXO_IN)
B
C
D
E
F
GND
GND
GND
GND
GND
AV
GND
GND
D
Supports Five Differential LVPECL Outputs
STATUS_
REF
I_REF
GND
GND
AV
CC
AV
CC
AV
CC
AV
CC
CC
D
Each Output Frequency Is Selectable by x1,
/2, /4, /8, /16
STATUS_
VCXO
VCXO_IN
GND
GND
GND
GND
V
CC
D
D
D
All Outputs Are Synchronized
Integrated Low-Noise OPA for External
Low-Pass Filter
VCXO_IN
B
GND
GND
V
V
V
V
V
V
CC
CC
CC
CC
CC
CC
Efficient Jitter Screening From Low PLL
Loop Bandwidth
Y0
GND
GND
GND
GND
Y4B
Y4
V
CC
Y0B
NPD
D
Low-Phase Noise Characteristic
G
H
V
V
V
V
V
CC
CC
CC
CC
V
CC
CC
D
Programmable Delay for Phase
Adjustments
Y1
Y1B
Y2
Y2B
Y3
Y3B
NRESET
D
D
D
Predivider Loop BW Adjustment
SPI Controllable Division Setting
Power-Up Control Forces LVPECL Outputs
to 3-State at VCC <1.5 V
D
3.3-V Power Supply
D
Available in a 64-Pin BGA Package
0,8-mm Pitch in Both Lead-Free ZVA and
Leaded GVA Packages
D
Industrial Temperature Range –40°C to
85°C
description
The CDC7005 is a high-performance, low-phase noise, and low-skew clock synthesizer and jitter cleaner that
synchronizes the voltage controlled crystal oscillator (VCXO) frequency to the reference clock. The
programmable predividers M and N give a high flexibility to the frequency ratio of the reference clock to VCXO:
VCXO_IN/REF_IN = (NxP)/M. The VCXO_IN clock operates up to 800 MHz. Through the selection of external
VCXO and loop filter components, the PLL loop bandwidth and damping factor can be adjusted to meet different
system requirements. Each of the five differential LVPECL outputs are programmable by the serial peripheral
interface (SPI). The SPI allows individual control of frequency and enable/disable state of each output. The
device operates in 3.3-V environment. The built-in latches ensure that all outputs are synchronized.
The CDC7005 is characterized for operation from –40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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Copyright 2004, Texas Instruments Incorporated
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1
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