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參數(shù)資料
| 型號： | AD603ARZ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | Low Noise, 90 MHz Variable Gain Amplifier |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封裝： | ROHS COMPLIANT, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 496K |
| 代理商： | AD603ARZ-REEL7 |
Low Noise, 90 MHz
Variable Gain Amplifier
AD603
FEATURES
Linear-in-dB gain control
Pin programmable gain ranges
11 dB to +31 dB with 90 MHz bandwidth
9 dB to 51 dB with 9 MHz bandwidth
Any intermediate range, for example 1 dB to +41 dB
with 30 MHz bandwidth
Bandwidth independent of variable gain
1.3 nV/√Hz input noise spectral density
±0.5 dB typical gain accuracy
APPLICATIONS
RF/IF AGC amplifier
Video gain control
A/D range extension
Signal measurement
GENERAL DESCRIPTION
The AD603 is a low noise, voltage-controlled amplifier for use
in RF and IF AGC systems. It provides accurate, pin selectable
gains of 11 dB to +31 dB with a bandwidth of 90 MHz or 9 dB
to 51 dB with a bandwidth of 9 MHz. Any intermediate gain
range may be arranged using one external resistor. The input
referred noise spectral density is only 1.3 nV/√Hz and power
consumption is 125 mW at the recommended ±5 V supplies.
Rev.
G
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2005 Analog Devices, Inc. All rights reserved.
www.analog.com
The decibel gain is linear in dB, accurately calibrated, and stable
over temperature and supply. The gain is controlled at a high
impedance (50 M), low bias (200 nA) differential input; the
scaling is 25 mV/dB, requiring a gain control voltage of only 1 V
to span the central 40 dB of the gain range. An overrange and
underrange of 1 dB is provided whatever the selected range. The
gain control response time is less than 1 μs for a 40 dB change.
The differential gain control interface allows the use of either
differential or single-ended positive or negative control voltages.
Several of these amplifiers may be cascaded and their gain
control gains offset to optimize the system S/N ratio.
The AD603 can drive a load impedance as low as 100 with
low distortion. For a 500 load in shunt with 5 pF, the total
harmonic distortion for a ±1 V sinusoidal output at 10 MHz is
typically 60 dBc. The peak specified output is ±2.5 V
minimum into a 500 load.
The AD603 uses a patented proprietary circuit topology—the
X-AMP. The X-AMP comprises a variable attenuator of 0 dB
to 42.14 dB followed by a fixed-gain amplifier. Because of the
attenuator, the amplifier never has to cope with large inputs and
can use negative feedback to define its (fixed) gain and dynamic
performance. The attenuator has an input resistance of 100 ,
laser trimmed to ±3%, and comprises a seven-stage R-2R ladder
network, resulting in an attenuation between tap points of
6.021 dB. A proprietary interpolation technique provides a
continuous gain control function which is linear in dB.
The AD603 is specified for operation from 40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
SCALING
REFERENCE
V
G
GAIN-
CONTROL
INTERFACE
AD603
PRECISION PASSIVE
INPUT ATTENUATOR
FIXED-GAIN
AMPLIFIER
1
NOMINAL VALUES.
R-2R LADDER NETWORK
VPOS
VNEG
GPOS
GNEG
VINP
COMM
0dB
–6.02dB
–12.04dB –18.06dB –24.08dB
–30.1dB
–36.12dB –42.14dB
R
R
R
R
R
R
R
2R
2R
2R
2R
2R
2R
R
20
1
694
1
6.44k
1
V
OUT
FDBK
0
8
6
1
2
5
7
4
3
Figure 1.
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| AD603 | M83723 55C 55#20 SKT RECP |
| AD603-EB | Low Noise, 90 MHz Variable-Gain Amplifier |
| AD603ACHIPS | Low Noise, 90 MHz Variable-Gain Amplifier |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD603-EB | 制造商:Analog Devices 功能描述:Evaluation Board For Low Noise, 90 MHz Variable Gain Amplifier |
| AD603-EVALZ | 功能描述:BOARD EVALUATION FOR AD603 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運算放大器 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:1 系列:- |
| AD603SQ/883B | 功能描述:差分放大器 IC 90 MHz VARIABLE GAIN AMP RoHS:否 制造商:Analog Devices 通道數(shù)量:1 Channel 帶寬:900 MHz 可用增益調(diào)整:5.6 dB to 20 dB 輸入補償電壓:1 mV at 5 V 共模抑制比（最小值）:67 dB 工作電源電壓:11 V 電源電流:28 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| AD603SQ/883B2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Noise, 90 MHz Variable Gain Amplifier |
| AD604 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual, Ultralow Noise Variable Gain Amplifier |
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