http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf



Analog Devices Semiconductor Electronic Components Datasheet



AD603

Variable Gain Amplifier



No Preview Available !

AD603 pdf
Data Sheet
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
The decibel gain is linear in dB, accurately calibrated, and stable
over temperature and supply. The gain is controlled at a high
impedance (50 MΩ), 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 SNR.
APPLICATIONS
RF/IF AGC amplifiers
Video gain controls
A/D range extensions
Signal measurements
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.
The AD603 can drive a load impedance as low as 100 Ω with
low distortion. For a 500 Ω 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 Ω 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 Ω,
laser trimmed to ±3%, and comprises a 7-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 that is linear in dB.
The AD603 is specified for operation from −40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
SCALING
REFERENCE
PRECISION PASSIVE
INPUT ATTENUATOR
FIXED-GAIN
AMPLIFIER
GPOS
GNEG
VG
GAIN-
CONTROL
INTERFACE
AD603
VINP
0dB –6.02dB –12.04dB –18.06dB –24.08dB –30.1dB –36.12dB –42.14dB
RR
2R
R
2R
R
2R
R
2R
R
2R
R
2R
R
COMM
R-2R LADDER NETWORK
*NOMINAL VALUES.
Figure 1.
VOUT
6.44k*
694*
FDBK
20*
Rev. K
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©1993–2012 Analog Devices, Inc. All rights reserved.



No Preview Available !

AD603 pdf
AD603* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
View a parametric search of comparable parts
Evaluation Kits
• AD603 Evaluation Board
Documentation
Application Notes
• AN-214: Ground Rules for High Speed Circuits
Data Sheet
• AD603: Military Data Sheet
• AD603: Low Noise, 90 MHz Variable Gain Amplifier Data
Sheet
Tools and Simulations
• AD603 SPICE Macro-Model
Reference Materials
Product Selection Guide
• Variable Gain Amplifier Selection Table
Tutorials
• Design and Operation of Automatic Gain Control Loops for
Receivers in Modern Communication Systems
Design Resources
• AD603 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all AD603 EngineerZone Discussions
Sample and Buy
Visit the product page to see pricing options
Technical Support
Submit a technical question or find your regional support
number
* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet. Note: Dynamic changes to
the content on this page does not constitute a change to the revision number of the product data sheet. This content may be
frequently modified.



Part Number AD603
Description Variable Gain Amplifier
Maker Analog Devices - Analog Devices
Total Page 25 Pages
PDF Download
AD603 pdf
Download PDF File
AD603 pdf
View for Mobile



Featured Datasheets

Part Number Description Manufacturers PDF
AD600 Dual/ Low Noise/ Wideband Variable Gain Amplifiers AD600
Analog Devices
PDF
AD602 Dual/ Low Noise/ Wideband Variable Gain Amplifiers AD602
Analog Devices
PDF
AD6025GP Fan AD6025GP
ADDA
PDF
AD603 Variable Gain Amplifier AD603
Analog Devices
PDF
AD604 Dual/ Ultralow Noise Variable Gain Amplifier AD604
Analog Devices
PDF
AD605 Dual/ Low Noise/ Single-Supply Variable Gain Amplifier AD605
Analog Devices
PDF


Part Number Start With

0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

site map

webmaste! click here

contact us

Buy Components