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參數(shù)資料
| 型號(hào)： | AD603AR-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | Low Noise, 90 MHz Variable-Gain Amplifier |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封裝： | MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 219K |
| 代理商： | AD603AR-REEL |
REV. C
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
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, e.g., –1 dB to +41 dB with
30 MHz Bandwidth
Bandwidth Independent of Variable Gain
1.3 nV/
√
Hz
Input Noise Spectral Density
6
0.5 dB Typical Gain Accuracy
MIL-STD-883 Compliant and DESC Versions Available
APPLICATIONS
RF/IF AGC Amplifier
Video Gain Control
A/D Range Extension
Signal Measurement
Low Noise, 90 MHz
Variable-Gain Amplifier
PRODUCT 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 1.3nV/
√
Hz
and power
consumption is 125 mW at the recommended
±
5 V supplies.
The decibel gain is “l(fā)inear 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
FUNCTIONAL BLOCK DIAGRAM
SCALING
REFERENCE
V
G
GAIN
CONTROL
INTERFACE
AD603
PRECISION PASSIVE
INPUT ATTENUATOR
FIXED GAIN
AMPLIFIER
*NORMAL 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
V
*
694
V
*
6.44k
V
*
V
OUT
FDBK
1 V to span the central 40 dB of the gain range. An over- and
under-range of 1 dB is provided whatever the selected range. The
gain-control response time is less than 1
μ
s 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-con-
trol 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 mini-
mum into a 500
load, or
±
1 V into a 100
load.
The AD603 uses a 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 AD603A is specified for operation from –40
°
C to +85
°
C
and is available in both 8-lead SOIC (R) and 8-lead ceramic
DIP (Q). The AD603S is specified for operation from –55
°
C to
+125
°
C and is available in an 8-lead ceramic DIP (Q). The
AD603 is also available under DESC SMD 5962-94572.
*
Patented.
X-AMP is a trademark of Analog Devices, Inc.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 2000
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| AD603AR-REEL7 | 功能描述:IC AMP VGA 90MHZ LN 50MA 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)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(yīng)商設(shè)備封裝:8-SOIC 包裝:帶卷 (TR) |
| AD603ARZ | 功能描述:IC AMP VGA 90MHZ LN 50MA 8SOIC 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 |
| AD603ARZ | 制造商:Analog Devices 功能描述:Programmable Gain Amplifier IC |
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