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AD9523 Datasheet(PDF) 55 Page - Analog Devices

Part # AD9523
Description  Jitter Cleaner and Clock Generator
Download  60 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9523 Datasheet(HTML) 55 Page - Analog Devices

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Data Sheet
AD9523
Rev. D | Page 55 of 60
Clock Distribution (Register 0x190 to Register 0x1B9)
Table 51. Channel 0 to Channel 13 Control (This Same Map Applies to All 14 Channels)
Address
Bits
Bit Name
Description
0x190
7
Invert divider output
Inverts the polarity of the divider’s output clock.
6
Ignore sync
0: obeys chip-level SYNC signal (default).
1: ignores chip-level SYNC signal.
5
Power-down channel
1: powers down the entire channel.
0: normal operation.
4
Lower power mode
(differential modes only)
Reduces power used in the differential output modes (LVDS/LVPECL/HSTL). This
reduction may result in power savings, but at the expense of performance. Note that
this bit does not affect output swing and current, just the internal driver power.
1: low strength/lower power.
0: normal operation.
[3:0]
Driver mode
Driver mode.
Bit 3
Bit 2
Bit 1
Bit 0
Driver Mode
0
0
0
0
Tristate output
0
0
0
1
LVPECL (8 mA)
0
0
1
0
LVDS (3.5 mA)
0
0
1
1
LVDS (7 mA)
0
1
0
0
HSTL-0 (16 mA)
0
1
0
1
HSTL-1 (8 mA)
0
1
1
0
CMOS (both outputs in phase)
+ Pin: true phase relative to divider output
− Pin: true phase relative to divider output
0
1
1
1
CMOS (opposite phases on outputs)
+ Pin: true phase relative to divider output
− Pin: complement phase relative to divider output
1
0
0
0
CMOS
+ Pin: true phase relative to divider output
− Pin: high-Z
1
0
0
1
CMOS
+ Pin: high-Z
− Pin: true phase relative to divider output
1
0
1
0
CMOS
+ Pin: high-Z
− Pin: high-Z
1
0
1
1
CMOS (both outputs in phase)
+ Pin: complement phase relative to divider output
− Pin: complement phase relative to divider output
1
1
0
0
CMOS (both outputs out of phase)
+ Pin: complement phase relative to divider output
− Pin: true phase relative to divider output
1
1
0
1
CMOS
+ Pin: complement phase relative to divider output
− Pin: high-Z
1
1
1
0
CMOS
+ Pin: high-Z
− Pin: complement phase relative to divider output
1
1
1
1
Tristate output
0x191
[7:0]
Channel divider,
Bits[7:0] (LSB)
Division = Channel Divider Bits[9:0] + 1. For example, [9:0] = 0 is divided by 1, [9:0] = 1
is divided by 2 … [9:0] = 1023 is divided by 1024. 10-bit channel divider, Bits[7:0] (LSB).
0x192
[7:2]
Divider phase
Divider initial phase after a sync is asserted relative to the divider input clock (from the
VCO divider output). LSB = ½ of a period of the divider input clock.
Phase = 0: no phase offset.
Phase = 1: ½ period offset, …
Phase = 63: 31 period offset.
[1:0]
Channel divider, Bits[9:8] (MSB)
10-bit channel divider, Bits[9:8] (MSB).


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