AD9520-2/PCBZ Analog Devices Inc, AD9520-2/PCBZ Datasheet - Page 18

• Manufacturer Part Number: AD9520-2/PCBZ
• Description: 12/24 Channel Clock Gen 2,0GH
• Manufacturer: Analog Devices Inc

Specifications of AD9520-2/PCBZ

• Design Resources: Synchronizing Multiple AD9910 1 GSPS Direct Digital Synthesizers (CN0121) Phase Coherent FSK Modulator (CN0186)
• Main Purpose: Timing, Clock Generator
• Utilized Ic / Part: AD9520-2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD9520-2
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 21. Pin Function Descriptions
Pin No.
1, 11, 12, 32,
40, 41,49,
57, 60, 61
2
3
4
5
6
7
8
9
10
13
14
Input/
Output
I
O
O
I
O
O
I
I
I
O
I
I
Pin
Type
Power
3.3 V CMOS
3.3 V CMOS
Power
Loop filter
3.3 V CMOS
3.3 V CMOS
3.3 V CMOS
Loop filter
Loop filter
Differential
clock input
Differential
clock input
SCLK/SCL
NOTES
1. EXPOSED DIE PAD MUST BE CONNECTED TO GND.
REF_SEL
REFMON
BYPASS
STATUS
SYNC
Mnemonic
VS
REFMON
LD
VCP
CP
STATUS
REF_SEL
SYNC
LF
CLK
CLK
BYPASS
VCP
CLK
CLK
VS
LD
CP
VS
VS
CS
LF
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
PIN 1
INDICATOR
Description
3.3 V Power Pins.
Reference Monitor (Output). This pin has multiple selectable outputs.
Lock Detect (Output). This pin has multiple selectable outputs.
Power Supply for Charge Pump (CP); VS < VCP < 5.0 V. VCP must still be connected
to 3.3 V if the PLL is not used.
Charge Pump (Output). This pin connects to an external loop filter. This pin can
be left unconnected if the PLL is not used.
Programmable Status Output.
Reference Select. It selects REF1 (low) or REF2 (high). This pin has an internal
30 kΩ pull-down resistor.
Manual Synchronizations and Manual Holdover. This pin initiates a manual
synchronization and is used for manual holdover. Active low. This pin has an
internal 30 kΩ pull-up resistor.
Loop Filter (Input). It connects internally to the VCO control voltage node.
This pin is for bypassing the LDO to ground with a 220 nF capacitor. This pin can
be left unconnected if the PLL is not used.
Along with CLK, this pin is the differential input for the clock distribution section.
Along with CLK, this pin is the differential input for the clock distribution section. If a
single-ended input is connected to the CLK pin, connect a 0.1 μF bypass capacitor
from this pin to ground.
Figure 5. Pin Configuration
Rev. 0 | Page 18 of 84
(Not to Scale)
AD9520
TOP VIEW
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
OUT3 (OUT3A)
OUT3 (OUT3B)
VS_DRV
OUT4 (OUT4A)
OUT4 (OUT4B)
OUT5 (OUT5A)
OUT5 (OUT5B)
VS
VS
OUT8 (OUT8B)
OUT8 (OUT8A)
OUT7 (OUT7B)
OUT7 (OUT7A)
VS_DRV
OUT6 (OUT6B)
OUT6 (OUT6A)