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參數資料
型號: ADF7020BCP
廠商: ANALOG DEVICES INC
元件分類: 無繩電話/電話
英文描述: High Performance ISM Band FSK/ASK Transceiver IC
中文描述: TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, QCC48
封裝: 7 X 7 MM, LFCSP-48
文件頁數: 33/40頁
文件大小: 797K
代理商: ADF7020BCP
Preliminary Technical Data
ADF7020
REGISTER 6—CORRELATOR/DEMODULATOR REGISTER
Rev. PrH | Page 33 of 40
DEMOD
RESET
CDR
RESET
DISCRIMINATOR BW
IF FILTER DIVIDER
L
C
L
D
P
R
I
I
C
M
L
Rx
RESET
ADDRESS
BITS
F
F
F
T
T
T
T
L
L
M
C
F
F
L
T
T
D
T
T
F
F
R
C
C
C
C
T
T
F
F
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
RI1
0
1
RxDATA
INVERT
RxDATA
RxDATA
CA1
0
1
FILTER CAL
NO CAL
CALIBRATE
ML1
0
1
MIXER LINEARITY
DEFAULT
HIGH
DP1
0
1
DOT PRODUCT
CROSS PRODUCT
DOT PRODUCT
LG1
0
1
LNA MODE
DEFAULT
REDUCED GAIN
FC3
0
0
.
.
.
.
1
FC1
1
0
.
.
.
.
1
FILTER CLOCK
DIVIDE RATIO
1
2
.
.
.
.
511
FC2
0
1
.
.
.
.
1
FC9
0
0
.
.
.
.
1
FC6
0
0
.
.
.
.
1
.
.
.
.
.
.
.
.
FC5
0
0
.
.
.
.
1
FC4
0
0
.
.
.
.
1
LI2
0
LI1
0
LNA BIAS
800
μ
A (DEFAULT)
0
Figure 34.
Notes:
1.
See the FSK Correlator/Demodulator section for an example of how to determine register settings.
2.
Nonadherence to correlator programming guidelines results in poorer sensitivity.
3.
The filter clock is used to calibrate the IF filter. The filter clock divide ratio should be adjusted so that the frequency is 50 kHz. The formula is
XTAL/FILTER_CLOCK_DIVIDE.
4.
The filter should be calibrated only when the crystal oscillator is settled. The filter calibration is initiated every time Bit R6_DB19 is set high.
5.
Discriminator_BW
= (
DEMOD_CLK
×
K
)/(800 × 10
3
). See the FSK Correlator/Demodulator section.
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