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參數(shù)資料
| 型號： | AD8332 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Ultralow Noise VGAs with Preamplifier and Programmable RIN |
| 中文描述： | 超低噪聲的VGA前置放大器和可編程與房地產(chǎn)經(jīng)紀(jì)人 |
| 文件頁數(shù)： | 26/32頁 |
| 文件大小： | 482K |
| 代理商： | AD8332 |
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AD8331/AD8332
Rev. C | Page 26 of 32
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8
7
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5
1
4
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2
9
13
10
COMM
VIP
LOP
COML
LMD
LON
VPS
INH
COMM
ENBV
ENBL
GAIN
0.1
μ
F
HILO
+5V
+5V
C
0.018
μ
F
NC
VOH
VOL
VOUT
VPOS
+5V
14
11
12
VCM
R
CLMP
NC
NC
NC
VIN
0.1
μ
F
AD8331
MODE
0
GAIN
MODE
VCM
CLMP
HILO
VIN
Figure 74. Disabling the LNA
INH
LNA
5
LMD
LOP
ADG736
LON
200
50
0.1
μ
F
18nF
SELECTR
FB
280
1.13k
AD8332
0
5
Figure 75. Accommodating Multiple Sources
MEASUREMENT CONSIDERATIONS
Figure 51 through Figure 55 show typical measurement
configurations and proper interface values for measurements
with 50 conditions.
Short-circuit input noise measurements are made using
Figure 53. The input-referred noise level is determined by
dividing the output noise by the numerical gain between Point
A and Point B and accounting for the noise floor of the
spectrum analyzer. The gain should be measured at each
frequency of interest and with low signal levels since a 50
load is driven directly. The generator is removed when noise
measurements are made.
ULTRASOUND TGC APPLICATION
The AD8332 ideally meets the requirements of medical and
industrial ultrasound applications. The TGC amplifier is a key
subsystem in such applications, since it provides the means for
echolocation of reflected ultrasound energy.
Figure 76 through Figure 78 are schematics of a dual, fully
differential system using the AD8332 and AD9238 12-bit high
speed ADC with conversion speeds as high as 65 MSPS. In this
example, the VGA outputs are dc-coupled, using the reference
output of the ADC and a level shifter to center the common-
mode output voltage to match that of the converter. Consult the
data sheet of the converter to determine whether external CMV
biasing is required. AC coupling is recommended if the CMV
of the VGA and ADC are widely disparate.
Using the circuit shown, and a high speed ADC FIFO
evaluation kit connected to a laptop PC, an FFT can be
performed on the AD8332. With the on-board clock of 20 MHz,
and minimal low-pass filtering, and both channels driven with a
1 MHz filtered sine wave, the THD is –75 dB, noise floor –93 dB
and HD2 –83 dB.
相關(guān)PDF資料 |
PDF描述 |
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| AD8332-EVAL | Ultralow Noise VGAs with Preamplifier and Programmable RIN |
| AD8332ACP-REEL | Ultralow Noise VGAs with Preamplifier and Programmable RIN |
| AD8332ACP-REEL7 | Ultralow Noise VGAs with Preamplifier and Programmable RIN |
| AD8332ARU | Ultralow Noise VGAs with Preamplifier and Programmable RIN |
| AD8331ARQ-REEL | Ultralow Noise VGAs with Preamplifier and Programmable RIN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8332ACP-R2 | 功能描述:IC VGA DUAL W/PREAMP LN 32-LFCSP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:X-AMP® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:可變增益放大器 應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| AD8332ACP-REEL | 制造商:Analog Devices 功能描述:SP Amp Variable Gain Amp Dual 5.5V 32-Pin LFCSP EP T/R 制造商:Rochester Electronics LLC 功能描述: |
| AD8332ACP-REEL7 | 制造商:Analog Devices 功能描述:SP Amp Variable Gain Amp Dual 5.5V 32-Pin LFCSP EP T/R 制造商:Rochester Electronics LLC 功能描述: |
| AD8332ACPZ-R2 | 功能描述:IC AMP VGA PREAMP PROGR 32-LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:X-AMP® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:可變增益放大器 應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| AD8332ACPZ-R7 | 功能描述:IC AMP VAR GAIN 2CHAN 32-LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:X-AMP® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:可變增益放大器 應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
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