Register 9-Agc Register - Analog Devices ADF7021-V Manual

ADF7021-V
REGISTER 9—AGC REGISTER
LNA_
BIAS
ML1 MIXER_LINEARITY
0 DEFAULT
1 HIGH
LI2 LI1 LNA_BIAS
0 0 800µA (DEFAULT)
LM1 LNA_MODE
0 DEFAULT
1 REDUCED GAIN
FI1 FILTER_CURRENT
0 LOW
1 HIGH
FG2
0
0
1
1
•
It is necessary to program this register only if AGC settings
other than the defaults are required.
•
In receive mode, AGC is set to automatic AGC by default
on power-up. The default thresholds are AGC_LOW_
THRESHOLD = 30 and AGC_HIGH_THRESHOLD = 70.
See the RSSI/AGC section for details.
FILTER_ LNA_ AGC_
GAIN GAIN MODE
GM2 GM1
0 0
0 1
1 0
1 1
FG1 FILTER_GAIN
0 8
1 24
0 72
1 INVALID
LG2 LG1 LNA_GAIN
0 3
0
0 1 10
1 0 30
1 1 INVALID
Figure 71. Register 9—AGC Register Map
AGC_HIGH_THRESHOLD
AGC_MODE
GL7 GL6
AUTO AGC
0 0
MANUAL AGC
0 0
FREEZE AGC
0 0
RESERVED
0 0
. .
. .
. .
1 1
1 1
1 1
GH7 GH6 GH5 GH4
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
. . . .
. . . .
. . . .
1 0 0 1
1 0 0 1
1 0 1 0
•
AGC high and low threshold values must be more than
30 apart to ensure correct operation.
•
An LNA gain of 30 is available only if LNA_MODE
(Bit DB25) is set to 0.
Rev. 0 | Page 54 of 60
AGC_LOW_THRESHOLD
AGC_LOW_
GL5 GL4 GL3 GL2 GL1
THRESHOLD
0 0 0 0 1
1
0 0 0 1 0
2
0 0 0 1 1 3
0 0 1 0 0 4
. . . . .
.
. . . . .
.
. . . . .
.
1 1 1 0 1
61
1 1 1 1 0
62
1 1 1 1 1 63
AGC_HIGH_
GH3 GH2 GH1
THRESHOLD
0 0 1 1
0 1 0
2
0 1 1
3
1 0 0
4
. . .
.
. . . .
. . . .
1 1 0 78
1 1 1
79
0 0 0
80
ADDRESS
BITS