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參數資料
| 型號： | AD8367 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 500 MHz, Linear-in-dB VGA with AGC Detector |
| 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 |
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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PDF描述 |
|---|---|
| AD8367ARU | 500 MHz, Linear-in-dB VGA with AGC Detector |
| AD8369 | 45 dB Digitally Controlled VGA LF to 600 MHz |
| AD8369ARU | 45 dB Digitally Controlled VGA LF to 600 MHz |
| AD8369ARU-REEL7 | 45 dB Digitally Controlled VGA LF to 600 MHz |
| AD8370 | LF to 750 MHz Digitally Controlled VGA |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8367_05 | 制造商:AD 制造商全稱:Analog Devices 功能描述:500 MHz, Linear-in-dB VGA with AGC Detector |
| AD8367ARU | 功能描述:IC AMP VGA 14TSSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標準包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數:1 輸出類型:- 轉換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SOIC 包裝:帶卷 (TR) |
| AD8367ARU-REEL | 制造商:Analog Devices 功能描述: |
| AD8367ARU-REEL7 | 功能描述:IC AMP VGA 14TSSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標準包裝:150 系列:- 放大器類型:音頻 電路數:2 輸出類型:- 轉換速率:5 V/µs 增益帶寬積:12MHz -3db帶寬:- 電流 - 輸入偏壓:100nA 電壓 - 輸入偏移:500µV 電流 - 電源:6mA 電流 - 輸出 / 通道:50mA 電壓 - 電源，單路/雙路(±):4 V ~ 32 V，±2 V ~ 16 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:8-TSSOP 包裝:管件 |
| AD8367ARU-REEL-7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:500 MHz, Linear-in-dB VGA with AGC Detector |
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