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AD6679 Datasheet(PDF) 77 Page - Analog Devices

Part # AD6679
Description  135 MHz BW IF Diversity Receiver
PDF  81 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD6679 Datasheet(HTML) 77 Page - Analog Devices

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Data Sheet
AD6679
Rev. B | Page 77 of 81
Reg.
Addr.
(Hex)
Register Name
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
Default
Notes
0x41E
NSR decimate by 2
High-
pass
filter
(HPF)/
low-pass
filter
mode
0 =
enable
LPF
1 =
enable
HPF
X
0
0
X
X
X
NSR
decimate
by 2
enable
0 =
disabled
1 =
enabled
0x00
0x420
NSR mode
X
X
X
X
NSR mode
000 = 21% BW mode
001 = 28% BW mode
X
0x00
0x422
NSR tuning
X
X
NSR tuning word; see the Noise Shaping Requantizer (NSR) section;
equations for the tuning word are dependent on the NSR mode
0x00
Variable Dynamic Range (VDR)
0x430
VDR control
X
X
X
0
X
X
VDR BW
mode
0 = 25%
BW
mode
1 = 43%
BW
mode
(only
available
for dual
complex
mode)
0 = dual
real
mode
1 = dual
complex
mode
(Channel
A = I,
Channel
B = Q)
0x01
0x434
VDR tuning
X
X
X
X
VDR center frequency; see the Variable
Dynamic Range (VDR) section for more details
on the center frequency, which is dependent
on the VDR mode
0x00
Digital Outputs and Test Modes
0x550
ADC test modes
(local)
User
pattern
selection
0 =
contin-
uous
repeat
1 =
single
pattern
0
Reset PN
long gen
0 = long
PN
enable
1 = long
PN reset
Reset PN
short gen
0 = short
PN enable
1 = short
PN reset
Test mode selection
0000 = off (normal operation)
0001 = midscale short
0010 = positive full scale
0011 = negative full scale
0100 = alternating checkerboard
0101 = PN sequence, long
0110 = PN sequence, short
0111 = 1/0 word toggle
1000 = user pattern test mode (used with
Register 0x550, Bit 7, and User Pattern 1 to
User Pattern 4 registers)
1111 = ramp output
0x00
0x551
User Pattern 1 LSB
0
0
0
0
0
0
0
0
0x00
Used
with
Reg.
0x550
0x552
User Pattern 1 MSB
0
0
0
0
0
0
0
0
0x00
Used
with
Reg.
0x550
0x553
User Pattern 2 LSB
0
0
0
0
0
0
0
0
0x00
Used
with
Reg.
0x550
0x554
User Pattern 2 MSB
0
0
0
0
0
0
0
0
0x00
Used
with
Reg.
0x550



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