參數(shù)資料
型號(hào): SI5315-EVB
廠商: Silicon Laboratories Inc
文件頁(yè)數(shù): 36/54頁(yè)
文件大?。?/td> 0K
描述: BOARD EVAL SI5315 8KHZ-644.53MHZ
應(yīng)用說(shuō)明: SI5315/17 Crystal Selection AppNote
標(biāo)準(zhǔn)包裝: 1
主要目的: 計(jì)時(shí),時(shí)鐘乘法器
嵌入式:
已用 IC / 零件: SI5315
主要屬性: 2 輸入,2 輸出
次要屬性: CML,CMOS,LVDS,LVPECL
已供物品: 板,CD,文檔
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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