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參數資料
| 型號： | AD8367-EVAL |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | RECTIFIER STANDARD SINGLE 1A 50V 50 30A-ifsm 5uA-ir 1V-vf DO-41 5K/REEL-13 |
| 中文描述： | 500兆赫，線性以dB顯卡帶AGC檢測 |
| 文件頁數： | 14/16頁 |
| 文件大小： | 607K |
| 代理商： | AD8367-EVAL |
REV. 0
AD8367
–14–
For an input signal consisting of a 4.096 MS/s QPSK modulated
carrier, the relationship between V
SET
and the output power for
this setup is shown in Figure 13. The exponential shape reflects
the linear-in-magnitude response of the AD8361. The adjacent
channel power ratio (ACPR) as a function of output power is
illustrated in Figure 14. The minima occur where the distortion
and integrated noise powers cross over.
The component values shown in Figure 12 were chosen for a
64-QAM signal at 500 kS/s at a carrier frequency of 150 MHz.
The response time of the loop as shown is roughly 5 ms for an
abrupt input level change of 40 dB. Figure 15 shows the dynamic
performance of the loop with a step-modulated CW signal applied
to the input for a V
SET
of about 1 V.
POUT
–
dBm Into 200
4.0
0
–
20
V
S
–
3.5
2.0
1.5
1.0
0.5
3.0
2.5
10
–
15
–
10
–
5
0
5
10MHz
380MHz
Figure 13. AGC Set-Point Voltage vs. Output Power
(QPSK: 4.096 MS/s;
0.22; 1 User)
U1
14
13
12
11
10
9
8
1
2
3
4
5
6
7
ENBL
INPT
MODE
GAIN
DET0
ICOM
ICOM
HPFL
VPSI
VPSO
VOUT
DECL
OCOM
ICOM
AD8367
C5
0.1 F
0.1 F
5V
V
INTO A
200 LOAD
U2
8
7
6
5
1
2
3
4
SREF
VRMS
FLTR
COMM
VPOS
IREF
RFIN
PWDN
AD8361
10nF
R6
66
RF INPUT
R5
10k
R4
33k
V
AGC
U3
AD820
0.1 F
4
6
7
2
3
5V
V
SET
C1
3.3nF
R3
82k
20pF
10nF
R1
200
10nF
10nF
R2
150k
12k
Vrms
C2
0.27 F
Vg
Figure 12. Example of Using an External Detector to Form an AGC Loop
POUT
–
dBm Into 200
–
20
–
60
A
–
–
25
–
40
–
45
–
50
–
55
–
30
–
35
–
20
10
–
15
–
10
–
5
0
5
380MHz
140MHz
10MHz
70MHz
Figure 14. ACPR versus Output Power for QPSK
Waveform (4.096 MS/s;
0.22; 1 User)
TIME
–
sec
1.0
0
V
–
O
–
0.5
0.0
–
0.5
–
1.0
–
1.5
–
2.0
0.005
0.010
0.015
0.020
0.025
0.030
0.035
0.040
V
OUT
V
g
Figure 15. AGC Dynamic Response: 8367 AGC with
an External Detector
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相關代理商/技術參數 |
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|---|---|
| AD8367-EVALZ | 制造商:Analog Devices 功能描述:EVAL BOARD - Bulk 制造商:Analog Devices 功能描述:AD8367 EVALUATION BOARD*NIC* |
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| AD8368 | 制造商:AD 制造商全稱:Analog Devices 功能描述:800 MHz, Linear-in-dB VGA with AGC Detector |
| AD8368_07 | 制造商:AD 制造商全稱:Analog Devices 功能描述:800 MHz, Linear-in-dB VGA with AGC Detector |
| AD8368ACP | 制造商:Analog Devices 功能描述:IC AMP VGA AGC 800MHZ 24LFCSP 制造商:Analog Devices 功能描述:IC, AMP, VGA, AGC, 800MHZ, 24LFCSP 制造商:Analog Devices 功能描述:IC, AMP, VGA, AGC, 800MHZ, 24LFCSP; Gain:22dB; Noise Figure Typ:9.5dB; RF IC Case Style:LFCSP; No. of Pins:24; Supply Voltage Min:4.5V; Supply Voltage Max:5.5V; RF Type:Cellular; Operating Temperature Min:-40C; Operating Temperature;RoHS Compliant: Yes |
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