VERSACLOCK LOW POWER CLOCK GENERATOR EEPROM CLOCK GENERATOR
參數(shù)資料
型號(hào): 5P49EE802NDGI
廠商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 25/26頁(yè)
文件大?。?/td> 0K
描述: IC CLOCK GENERATOR 28QFN
標(biāo)準(zhǔn)包裝: 75
系列: VersaClock™
類型: 時(shí)鐘發(fā)生器
PLL: 帶旁路
輸入: LVTTL,晶體
輸出: LVCMOS,LVTTL
電路數(shù): 1
比率 - 輸入:輸出: 2:7
差分 - 輸入:輸出: 無/是
頻率 - 最大: 120MHz
除法器/乘法器: 是/無
電源電壓: 1.71 V ~ 1.89 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 28-VFQFPN(4x4)
包裝: 管件
其它名稱: 800-2523
IDT5P49EE802
VERSACLOCK LOW POWER CLOCK GENERATOR
EEPROM CLOCK GENERATOR
IDT VERSACLOCK LOW POWER CLOCK GENERATOR
8
IDT5P49EE802
REV M 072512
VSYNC, HSYNC, DOT_CLK – Modulation Rate Relationship
LOOP FILTER
The loop filter for each PLL can be programmed to optimize
the jitter performance. The low-pass frequency response of
the PLL is the mechanism that dictates the jitter transfer
characteristics. The loop bandwidth can be extracted from
the jitter transfer. A narrow loop bandwidth is good for jitter
attenuation while a wide loop bandwidth is best for low jitter
generation. The specific loop filter components that can be
programmed are the resistor via the RZ[4:0] bits, zero
capacitor via the CZ[2:0] bits, pole capacitor via the CP[1:0]
bits, and the charge pump current via the IP#[2:0] bits.
The following equations govern how the loop filter is set:
Zero capacitor (Cz) = 280pF
Pole capacitor (Cp) = 30pF
Charge pump (Ip) = IP#[2:0] uA
VCO gain (KVCO) = 350MHz/V * 2
π
Integer multiple of HSYNC periods
VSYNC
HSYNC
DOT_CLK
Modulation
Rate
X/2
X
X/2
X
X = Number of cycles of DOT_CLK per HSYNC period.
X/2 = Number of cycles of DOT_CLK that the modulation edge rises/falls.
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