AD9520-3 Analog Devices, Inc., AD9520-3 Datasheet - Page 18
AD9520-3
Manufacturer Part Number
AD9520-3
Description
12 Lvpecl/24 Cmos Output Clock Generator With Integrated 2 Ghz Vco
Manufacturer
Analog Devices, Inc.
Datasheet
1.AD9520-3.pdf
(84 pages)
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AD9520-3
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
Mnemonic
VS
REFMON
LD
VCP
CP
STATUS
REF_SEL
SYNC
LF
BYPASS
CLK
CLK
STATUS
SYNC
VCP
CLK
CLK
CP
CS
VS
LD
VS
VS
LF
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
PIN 1
INDICATOR
3.3 V Power Pins.
Lock Detect (Output). It has multiple selectable outputs.
Power Supply for Charge Pump (CP); VS < VCP < 5.0 V.
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.
This pin is for bypassing the LDO to ground with a capacitor.
Along with CLK, this is the differential input for the clock distribution section.
Along with CLK, this is the differential input for the clock distribution section.
Description
Reference Monitor (Output). It has multiple selectable outputs.
Charge Pump (Output). It connects to external loop filter.
Programmable Status Output.
Loop Filter (Input). It connects internally to the VCO control voltage node.
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)
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