EVAL-ADF7021-VDB2Z Analog Devices Inc, EVAL-ADF7021-VDB2Z Datasheet - Page 50

• Manufacturer Part Number: EVAL-ADF7021-VDB2Z
• Description: 868 - 870MHz - EVALUATION BOARD
• Manufacturer: Analog Devices Inc
• Type: Transceiverr

Specifications of EVAL-ADF7021-VDB2Z

• Frequency: 868MHz ~ 870MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ADF7021
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADF7021-V
REGISTER 5—IF FILTER SETUP REGISTER
•
•
A coarse IF filter calibration is performed when the
IF_CAL_COARSE bit (Bit DB4) is set. If the IF_FINE_
CAL bit (Register 6, Bit DB4) has been previously set, a
fine IF filter calibration is automatically performed after
the coarse calibration.
Set IF_FILTER_DIVIDER such that
IF
GA1
0
1
_
FILTER
GQ1
0
1
IR_GAIN_ADJUST_UP/DN
GAIN
ATTENUATE
XTAL
IR_GAIN_ADJUST_I/Q
ADJUST I CH
ADJUST Q CH
0
0
0
.
1
GM5
_
ADJUST_MAG
DIVIDER
IR_GAIN_
0
0
0
.
1
GM4
GM3
0
0
0
.
1
PD1
0
1
=
GM2 GM1
0
0
1
.
1
50
IR_PHASE_ADJUST_DIRECTION
ADJUST I CH
ADJUST Q CH
kHz
0
1
0
.
1
PM4
0
0
0
.
1
ADJUST_MAG
IR_PHASE_
ADJUST_MAG
0
1
2
...
31
PM3
0
0
0
.
1
IR_GAIN_
Figure 67. Register 5—IF Filter Setup Register Map
PM2 PM1
0
0
1
.
1
0
1
0
.
1
IFA6
0
0
0
..
0
1
1
1
1
1
IR_PHASE_
ADJUST_MAG
IF_FILTER_ADJUST
0
1
2
...
15
IFA5
0
0
0
..
1
0
0
0
.
1
Rev. 0 | Page 50 of 60
...
...
...
...
...
...
...
...
...
...
...
IFA2
0
0
1
..
1
0
0
1
.
1
IFA1 IF_FILTER_ADJUST
0
1
0
..
1
0
1
0
.
1
•
•
0
+1
+2
+31
0
–1
–2
...
–31
...
IF_FILTER_ADJUST allows the IF fine filter calibration
result to be programmed directly on subsequent receiver
power-ups, thereby eliminating the need to redo a fine filter
calibration in some instances. See the Filter Bandwidth
Calibration Readback section for information about using
the IF_FILTER_ADJUST bits.
Bits[DB31:DB20] are used for image rejection calibration.
See the Image Rejection Calibration section for information
about how to program these parameters.
IFD9
0
0
.
.
.
.
1
.
.
.
.
.
.
.
.
IF_FILTER_DIVIDER
IFD6
0
0
.
.
.
.
1
IFD5
0
0
.
.
.
.
1
IFD4
0
0
.
.
.
.
1
IFD3
0
0
.
.
.
.
1
IFD2
0
1
.
.
.
.
1
CC1 IF_CAL_COARSE
0
1
IFD1
1
0
.
.
.
.
1
DISABLED
ENABLED
IF_FILTER_
DIVIDER
1
2
.
.
.
.
511
ADDRESS
BITS