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AD6684 Datasheet(PDF) 93 Page - Analog Devices

Part # AD6684
Description  135 MHz Quad IF Receiver
PDF  107 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD6684 Datasheet(HTML) 93 Page - Analog Devices

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Data Sheet
AD6684
Rev. 0 | Page 93 of 107
Address
Name
Bits
Bit Name
Settings
Description
Reset
Access
0x031E
Pair map
DDC 0 Phase
Offset 1
[7:0]
DDC 0 NCO phase value,
twos complement[15:8]
Twos complement phase offset value for
the NCO.
0x0
R/W
0x031F
Pair map
DDC 0 Phase
Offset 2
[7:0]
DDC 0 NCO phase value,
twos complement[23:16]
Twos complement phase offset value for
the NCO.
0x0
R/W
0x0320
Pair map
DDC 0 Phase
Offset 3
[7:0]
DDC 0 NCO phase value,
twos complement[31:24]
Twos complement phase offset value for
the NCO.
0x0
R/W
0x0321
Pair Map
DDC 0 Phase
Offset 4
[7:0]
DDC 0 NCO phase value,
twos complement[39:32]
Twos complement phase offset value for
the NCO.
0x0
R/W
0x0322
Pair map
DDC 0 Phase
Offset 5
[7:0]
DDC 0 NCO phase value,
twos complement[47:40]
Twos complement phase offset value for
the NCO.
0x0
R/W
0x0327
Pair map
DDC 0 test
enable
[7:3]
Reserved
Reserved.
0x0
R
2
DDC 0 Q output test mode
enable
Q samples always use the Test Mode B/
Test Mode D block.
0x0
R/W
0
Test mode disabled.
1
Test mode enabled.
1
Reserved
Reserved.
0x0
R
0
DDC 0 I output test mode
enable
I Samples always use Test Mode A/ Test
Mode C block.
0x0
R/W
0
Test mode disabled.
1
Test mode enabled.
0x0330
Pair map
DDC 1
control
7
DDC 1 mixer select
0x0
R/W
0
Real mixer (I and Q inputs must be from
the same real channel).
1
Complex mixer (I and Q must be from
separate, real and imaginary quadrature ADC
receive channels—analog demodulator).
6
DDC 1 gain select
Gain can be used to compensate for the
6 dB loss associated with mixing an input
signal down to baseband and filtering out
its negative component.
0x0
R/W
0
0 dB gain.
1
6 dB gain (multiply by 2).
[5:4]
DDC 1 IF mode
0x0
R/W
00
Variable IF mode.
01
0 Hz IF mode.
10
fS/4 Hz IF mode.
11
Test mode.
3
DDC 1 complex to real
enable
0x0
R/W
0
Complex (I and Q) outputs contain valid
data.
1
Real (I) output only. Complex to real enabled.
Uses extra fS/4 mixing to convert to real.
2
Reserved
Reserved.
0x0
R



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