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ADF7021 Datasheet(PDF) 52 Page - Analog Devices

Part # ADF7021
Description  High Performance Narrow-Band Transceiver IC
PDF  64 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADF7021 Datasheet(HTML) 52 Page - Analog Devices

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ADF7021
Data Sheet
Rev. B | Page 52 of 64
REGISTER 5—IF FILTER SETUP REGISTER
IR_PHASE_
ADJUST_MAG
IR_GAIN_
ADJUST_MAG
IF_FILTER_DIVIDER
IF_FILTER_ADJUST
ADDRESS
BITS
CC1
0
1
CAL
NO CAL
DO CAL
PD1
0
1
IR PHASE ADJUST I/Q
ADJUST I CH
ADJUST Q CH
GA1
0
1
IR GAIN ADJUST UP/DN
GAIN
ATTENUATE
GQ1
0
1
IR GAIN ADJUST I/Q
ADJUST I CH
ADJUST Q CH
IFD3
0
0
.
.
.
.
1
IFD1
1
0
.
.
.
.
1
FILTER CLOCK
DIVIDE RATIO
1
2
.
.
.
.
511
IFD2
0
1
.
.
.
.
1
IFA2
0
0
1
..
1
0
0
1
.
1
IF FILTER
ADJUST
IFA6
0
0
0
..
0
1
1
1
1
1
GM3
IR GAIN
ADJUST
GM5
0
0
0
.
1
IFD9
0
0
.
.
.
.
1
IFD6
0
0
.
.
.
.
1
.
.
.
.
.
.
.
.
IFD5
0
0
.
.
.
.
1
IFD4
0
0
.
.
.
.
1
0
1
0
..
1
0
1
0
.
1
IFA1
...
...
...
...
...
...
...
...
...
...
...
0
+1
+2
...
+31
0
–1
–2
...
–31
GM4
GM2 GM1
0
0
0
.
1
0
0
0
.
1
0
0
1
.
1
0
1
0
.
1
0
1
2
...
31
PM2
IR PHASE
ADJUST
PM3
PM1 PM1
0
0
0
.
1
0
0
0
.
1
0
0
1
.
1
0
1
0
.
1
0
1
2
...
15
IFA5
0
0
0
..
1
0
0
0
.
1
Figure 67. Register 5—IF Filter Setup Register Map
A coarse IF filter calibration is performed when the
IF_CAL_COARSE bit (DB4) is set. If the IF_FINE_CAL bit
(R6_DB4) has been previously set, a fine IF filter calibration is
automatically performed after the coarse calibration.
Set IF_FILTER_DIVIDER such that
kHz
50
_
_
=
DIVIDER
FILTER
IF
XTAL
IF_FILTER_ADJUST allows the IF fine filter calibration result
to be programmed directly on subsequent receiver power-ups,
thereby saving on the need to redo a fine filter calibration in
some instances. Refer to the Filter Bandwidth Calibration
Readback section for information about using the
IF_FILTER_ADJUST bits.
DB[20:31] are used for image rejection calibration. Refer to the
Image Rejection Calibration section for details on how to
program these parameters.



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