器件名称: SSDCI1108AF
功能描述: 展频IC 1108规格书
文件大小: 655.23KB 共3页
简 介:Spectrum Device
SSDCI1108AF
Spread Spectrum Clock Generator
SSDCI1108AF
■ DESCRIPTION
SSDCI1108AF is a clock generator for EMI (Electro Magnetic Interference) reduction. The peak of unnecessary (EMI) can be attenuated by making the oscillation frequency slightly modulate periodically with the internal modulator. SSDCI1108AF accepts an input clock either from a fundamental Crystal or from an external reference and locks on to it delivering a 1x modulated clock output.
■ FEATURE
Power down pin : 50 PA (Max) consumption current at power down Input frequency : 12.0 MHz to 55.0 MHz Output frequency : 12.0 MHz to 55.0 MHz (One-fold input frequency) Analog Spreading Range Selection Modulation clock output Duty : 45% to 55% Modulation clock Cycle-Cycle Jitter : Less than 250 ps Power supply voltage : 2.5V--3.3 V Package : 8-pin TDFN Operating temperature : ﹣ 40 ℃ to ﹢85 ℃
■
Application
SSDCI1108AF is targeted for consumer electronics application such as MFP, STB, DSC, MID,HDMI,LCD panel Camcorder,and other timing sensitive analog video imaging applications Applications of HDMI, RJ45 port has good compatibility
www.spreaddevice.com
1/13
Spectrum Device
■ BLOCK DIAGRAM
VDD
SSDCI1108AF
8
XIN / CKIN
1
Clock input Clock out
CKOUT
2
Spread Spectrum ON/OFF SSON 3
ADS 7
PLL block
Modulation clock output
5 ModOUT
Analog Spreading Range setting
Modulation Rate MR 6 Select
4 GND
1 M
Phase compare Charge pump V/I conversion
Frequency setting
IDAC
ICO
Refere……