参数资料
型号: SI5315B-C-GMR
厂商: Silicon Laboratories Inc
文件页数: 36/54页
文件大小: 0K
描述: IC CLOCK MULT 8KHZ-125MHZ 36QFN
应用说明: SI5315/17 Crystal Selection AppNote
标准包装: 250
系列: DSPLL®
类型: 时钟/频率倍增器,抖动衰减器,多路复用器
PLL:
主要目的: 以太网,SONET/SDH/PDH,电信
输入: CML,CMOS,LVDS,LVPECL
输出: CML,CMOS,LVDS,LVPECL
电路数: 1
比率 - 输入:输出: 2:2
差分 - 输入:输出: 是/是
频率 - 最大: 125MHz
电源电压: 1.71 V ~ 3.63 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 36-VFQFN 裸露焊盘
供应商设备封装: 36-QFN(6x6)
包装: 带卷 (TR)
Si5315
Rev. 1.0
41
8. Power Supply Filtering
This device incorporates an on-chip voltage regulator with excellent PSRR to power the device from a supply
voltage of 1.8, 2.5, or 3.3 V. The device requires minimal supply decoupling and no stringent layout or ground plane
islands. Internal core circuitry is driven from the output of this regulator while I/O circuitry uses the external supply
voltage directly. Table 3, “AC Characteristics” gives the sensitivity of the on-chip oscillator to changes in the supply
voltage. Refer to the Si5315 evaluation board for an example.
The center ground pad under the device must be electrically and thermally connected to the ground plane.
Figure 22. Typical Power Supply Bypass Network
Figure 23. Fout = 155 MHz with 112 Hz Loop Bandwidth, 100 mVp-p Supply Noise
Si5315
V
DD
GND &
GND Pad
C1 – C3
C
4
Ferrite
Bead
0.1 uF
1.0 uF
System
Power
Supply
(1.8, 2.5, or
3.3 V)
-105
-100
-95
-90
-85
-80
-75
-70
-65
-60
1
10
100
1000
Frequency of Power Supply Noise (kHz)
Power Supply Noise to Output Transfer Function
Pow
e
rS
u
ppl
y
Noi
se
Rej
ecti
on
Rat
io
(dB)
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