AD9520-5BCPZ-REEL7 Analog Devices Inc, AD9520-5BCPZ-REEL7 Datasheet - Page 43
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AD9520-5BCPZ-REEL7
Manufacturer Part Number
AD9520-5BCPZ-REEL7
Description
12/24-Output Clock Generator
Manufacturer
Analog Devices Inc
Type
Clock Generator, Fanout Distributionr
Datasheet
1.AD9520-5BCPZ.pdf
(80 pages)
Specifications of AD9520-5BCPZ-REEL7
Design Resources
Synchronizing Multiple AD9910 1 GSPS Direct Digital Synthesizers (CN0121) Phase Coherent FSK Modulator (CN0186)
Pll
Yes
Input
CMOS, LVDS, LVPECL
Output
CMOS, LVPECL
Number Of Circuits
1
Ratio - Input:output
2:12, 2:24
Differential - Input:output
Yes/Yes
Frequency - Max
2.4GHz
Divider/multiplier
Yes/No
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
64-LFCSP
Frequency-max
1.6GHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
LVPECL Output Drivers
The LVPECL differential voltage (V
~400 mV to 960 mV, see Bit 1 and Bit 2 in Register 0x0F0 to
Register 0x0FB). The LVPECL outputs have dedicated pins for
power supply (VS_DRV), allowing a separate power supply to
be used. VS_DRV can be from 2.5 V or from 3.3 V.
The LVPECL output polarity can be set as noninverting or
inverting, which allows for the adjustment of the relative
polarity of outputs within an application without requiring a
board layout change. Each LVPECL output can be powered
down or powered up as needed. Because of the architecture of
the LVPECL output stages, there is the possibility of electrical
overstress and breakdown under certain power-down conditions.
For this reason, the LVPECL outputs have two power-down
modes: total power-down and safe power-down.
SYNC PIN
INPUT TO CHANNEL DIVIDER
SYNC PIN
INPUT TO CHANNEL DIVIDER
INPUT TO VCO DIVIDER
CHANNEL DIVIDER
CHANNEL DIVIDER
OUTPUT CLOCKING
OUTPUT CLOCKING
CHANNEL DIVIDER
CHANNEL DIVIDER
INPUT TO CLK
OUTPUT OF
OUTPUT OF
OD
) is selectable (from
Figure 40. SYNC Timing Pipeline Delay When VCO Divider Is Not Used
Figure 39. SYNC Timing Pipeline Delay When VCO Divider Is Used
1
1
14 TO 15 CYCLES AT CHANNEL DIVIDER INPUT + 1 CYCLE AT VCO DIVIDER INPUT
14 TO 15 CYCLES AT CHANNEL DIVIDER INPUT + 1 CYCLE AT CLK INPUT
2
2
3
3
CHANNEL DIVIDER OUTPUT STATIC
CHANNEL DIVIDER OUTPUT STATIC
Rev. 0 | Page 43 of 80
4
4
5
5
6
6
In total power-down mode, all output drivers are shut off
simultaneously. This mode must not be used if there is an
external voltage bias network (such as Thevenin equivalent
termination) on the output pins that will cause a dc voltage to
appear at the powered down outputs. However, total power-
down mode is allowed when the LVPECL drivers are terminated
using only pull-down resistors. The total power-down mode is
activated by setting 0x230[1].
The primary power-down mode is the safe power-down mode.
This mode continues to protect the output devices while
powered down. There are three ways to activate safe power-
down mode: individually set the power-down bit for each
driver, power down an individual output channel (all of the
drivers associated with that channel are powered down
automatically), and activate sleep mode.
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
1
1
OUTPUT CLOCKING
OUTPUT CLOCKING
CHANNEL DIVIDER
CHANNEL DIVIDER
AD9520-5