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參數(shù)資料
| 型號： | AD8367ARU |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 6/24頁 |
| 文件大小： | 0K |
| 描述： | IC AMP VGA 14TSSOP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | X-AMP® |
| 放大器類型： | 可變增益 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 500MHz |
| 電流 - 輸入偏壓： | 27µA |
| 電流 - 電源： | 26mA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-TSSOP |
| 包裝： | 管件 |
AD8367
Rev. A | Page 14 of 24
APPLICATIONS
The AD8367 can be configured either as a VGA whose gain
is controlled externally through the GAIN pin or as an AGC
amplifier, using a supply voltage of 2.7 V to 5.5 V. The supply
to the VPSO and VPSI pins should be decoupled using a low
inductance, 0.1 μF surface-mount, ceramic capacitor as close
as possible to the device. Additional supply decoupling can
be provided by a small series resistor. A 10 nF capacitor from
Pin DECL to Pin OCOM is recommended to decouple the
output reference voltage.
INPUT AND OUTPUT MATCHING
The AD8367 is designed to operate in a 200 Ω impedance
system. The output amplifier is a low output impedance voltage
buffer with a 50 Ω damping resistor to desensitize it from load
reactance and parasitics. The quoted performance includes the
voltage division between the 50 Ω resistor and the 200 Ω load.
The AD8367 can be reactively matched to an impedance other
than 200 Ω by using traditional step-up and step down
matching networks or high quality transformers. Table 4 lists
the 50 Ω S-parameters for the AD8367 at a VGAIN = 750 mV.
Figure 32 illustrates an example where the AD8367 is matched
to 50 Ω at 140 MHz. As shown in the Smith Chart, the input
matching network shifts the input impedance from ZIN to 50 Ω
with an insertion loss of <2 dB over a 5 MHz bandwidth. For
the output network, the 50 Ω load is made to present 200 Ω to
the AD8367 output. Table 5 provides the component values
required for 50 Ω matching at several frequencies of interest.
When added loss and noise can be tolerated, a resistive pad can
be used to provide broadband, near-matched impedances at the
device terminals and the terminations.
Minimum-loss, L-pad networks are used on the evaluation
board (see Figure 45) to allow easy interfacing to standard
50 Ω test equipment. Each pad introduces an 11.5 dB power
loss (5.5 dB voltage loss).
1
0.3333
–0.3333
–1
–3
3
0.3333
1
3
ZIN
RSOURCE
SERIES L
SHUNT C
02710-032
ZIN
XSIN
100nH
ZLOAD
ZOUT
XSOUT
13pF
CAC
0.1
μF
RSOURCE
50
Ω
RLOAD
50
Ω
XPOUT
120nH
VS
XPIN
8.2pF
AD8367
fC = 140MHz, ZIN = 197 – j34.2, RSOURCE = 50Ω
Figure 32. Reactive Matching Example for f = 140 MHz
Table 4. S-Parameters for 200 Ω System for VS = 5 V and VGAIN = 0.75 V
Frequency (MHz)
S11
S21
S12
S22
10
0.04
∠ 43.8°
41.1
∠ 178.8°
0.0003
∠ 76.1°
0.56
∠ 179.3°
70
0.09
∠ 81.5°
43.6
∠ 163.4°
0.0002
∠ 63.7°
0.55
∠ +176.1°
140
0.17
∠ 103.4°
48.0
∠ 141.4°
0.0009
∠ 130.8°
0.56
∠ +170.2°
190
0.21
∠ 111.7°
47.5
∠ 124.0°
0.0017
∠ 96.8°
0.54
∠ +166.5°
240
0.26
∠ 103.8°
48.3
∠ 107.6°
0.0018
∠ 113.5°
0.48
∠ +164.6°
Table 5. Reactive Matching Components for a 50 Ω System where RSOURCE = 50 Ω, RLOAD = 50 Ω
Frequency (MHz)
XSIN
XPIN (pF)
XSOUT (pF)
XPOUT
10
1.5 μH
120
180
1.8 μH
70
220 nH
15
27
270 nH
140
100 nH
8.2
13
120 nH
190
82 nH
2.7
10
100 nH
240
68 nH
1.5
7
82 nH
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(biāo)準(zhǔn)包裝:150 系列:- 放大器類型:音頻 電路數(shù):2 輸出類型:- 轉(zhuǎn)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(yīng)商設(shè)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 |
| AD8367ARUZ | 功能描述:IC AMP VGA 14TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD8367ARUZ | 制造商:Analog Devices 功能描述:PROGRAMMABLE GAIN AMPLIFIER IC ((NW)) |
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