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ADF7021 데이터시트(PDF) 56 Page - Analog Devices

부품명 ADF7021
상세설명  High Performance Narrow-Band Transceiver IC
PDF  64 Pages
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ADF7021 데이터시트(HTML) 56 Page - Analog Devices

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ADF7021
Data Sheet
Rev. B | Page 56 of 64
REGISTER 9—AGC REGISTER
AGC_HIGH_THRESHOLD
LNA_
GAIN
AGC_
MODE
FILTER_
GAIN
AGC_LOW_THRESHOLD
ADDRESS
BITS
FI1
0
1
FILTER CURRENT
LOW
HIGH
0
1
2
3
AGC MODE
AUTO AGC
MANUAL AGC
FREEZE AGC
RESERVED
FG2
0
0
1
1
FG1
0
1
0
1
FILTER GAIN
8
24
72
INVALID
LG2
0
0
1
1
LG1
0
1
0
1
LNA GAIN
3
10
30
INVALID
GL3
0
0
0
1
.
.
.
1
1
1
GL1
1
0
1
0
.
.
.
1
0
1
AGC LOW
THRESHOLD
1
2
3
4
.
.
.
61
62
63
GL2
0
1
1
0
.
.
.
0
1
1
GL7
0
0
0
0
.
.
.
1
1
1
GL6
0
0
0
0
.
.
.
1
1
1
GL5
0
0
0
0
.
.
.
1
1
1
GL4
0
0
0
0
.
.
.
1
1
1
GH3
0
0
0
1
.
.
.
1
1
0
GH1
1
0
1
0
.
.
.
0
1
0
AGC HIGH
THRESHOLD
1
2
3
4
.
.
.
78
79
80
GH2
0
1
1
0
.
.
.
1
1
0
GH7
0
0
0
0
.
.
.
1
1
1
GH6
0
0
0
0
.
.
.
0
0
0
GH5
0
0
0
0
.
.
.
0
0
1
GH4
0
0
0
0
.
.
.
1
1
0
LI2
0
LI1
0
LNA BIAS
800µA (DEFAULT)
LG1
0
1
LNA MODE
DEFAULT
REDUCED GAIN
ML1
0
1
MIXER LINEARITY
DEFAULT
HIGH
Figure 71. Register 9—AGC Register Map
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. It is only necessary to program this register if
AGC settings, other than the defaults, are required.
AGC high and low settings must be more than 30 apart to
ensure correct operation.
An LNA gain of 30 is available only if LNA_MODE (DB25) is
set to 0.



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