参数资料
型号: SI5317B-C-GMR
厂商: SILICON LABORATORIES
元件分类: 时钟产生/分配
英文描述: 350 MHz, OTHER CLOCK GENERATOR, QCC36
封装: 6 X 6 MM, ROHS COMPLIANT, MO-220VJJD, QFN-36
文件页数: 27/46页
文件大小: 407K
代理商: SI5317B-C-GMR
Si5317
Rev. 1.1
33
6. Power Supply Filtering
This device incorporates an on-chip voltage regulator to power the device from supply voltages of 1.8, 2.5, or 3.3 V.
Internal core circuitry is driven from the output of this regulator while I/O circuitry uses the external supply voltage
directly. Table 4, “AC Characteristics” gives the sensitivity of the on-chip oscillator to changes in the supply voltage.
The center ground pad under the device must be electrically and thermally connected to the ground plane. See
Figure 19. Typical Power Supply Bypass Network
Figure 20. Fin = Fout = 155 MHz with 120 Hz Loop Bandwidth, 100 mV, pk-pk Supply Noise
Si5317
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
Power Supply Noise to Output Transfer Function
Power
Supply
Noise
Re
je
c
tio
n
Ra
ti
o
(d
B)
Frequency of Power Supply Noise (kHz)
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