SI5317C-C-GMR Silicon Laboratories Inc, SI5317C-C-GMR Datasheet - Page 34

• Manufacturer Part Number: SI5317C-C-GMR
• Manufacturer: Silicon Laboratories Inc

Specifications of SI5317C-C-GMR

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Si5317
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 25, “Ground Pad Recommended Layout,” on page 43.
34
Figure 20. Fin = Fout = 155 MHz with 120 Hz Loop Bandwidth, 100 mV, pk-pk Supply Noise
-100
-105
-60
-65
-70
-75
-80
-85
-90
-95
1
(1.8, 2.5, or
Figure 19. Typical Power Supply Bypass Network
System
Supply
Power
Power Supply Noise to Output Transfer Function
3.3 V)
Frequency of Power Supply Noise (kHz)
10
Ferrite
Bead
Rev. 1.0
V
DD
Si5317
1.0 uF
0.1 uF
100
GND Pad
C
C
GND &
4
1
– C
3
1000