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AD9631AN Datasheet(PDF) 1 Page - Analog Devices

Part # AD9631AN
Description  Ultralow Distortion, Wide Bandwidth Voltage Feedback Op Amps
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

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AD9631/AD9632
Ultralow Distortion, Wide Bandwidth
Voltage Feedback Op Amps
a
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 that
may result from its use. 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 companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© 2003 Analog Devices, Inc. All rights reserved.
FEATURES
Wide Bandwidth
AD9631, G = +1
AD9632, G = +2
Small Signal
320 MHz
250 MHz
Large Signal (4 V p-p)
175 MHz
180 MHz
Ultralow Distortion (SFDR), Low Noise
–113 dBc Typ @ 1 MHz
–95 dBc Typ @ 5 MHz
–72 dBc Typ @ 20 MHz
46 dBm Third Order Intercept @ 25 MHz
7.0 nV/
÷Hz Spectral Noise Density
High Speed
Slew Rate 1300 V/ s
Settling 16 ns to 0.01%, 2 V Step
3 V to
5 V Supply Operation
17 mA Supply Current
APPLICATIONS
ADC Input Driver
Differential Amplifiers
IF/RF Amplifiers
Pulse Amplifiers
Professional Video
DAC Current to Voltage
Baseband and Video Communications
Pin Diode Receivers
Active Filters/Integrators/Log Amps
PIN CONFIGURATION
8-Lead PDIP (N)
and SOIC (R) Packages
1
2
3
4
NC
–INPUT
+INPUT
–VS
TOP VIEW
8
7
6
5
NC
+VS
OUTPUT
NC
AD9631/
AD9632
NC = NO CONNECT
A proprietary design architecture has produced an amplifier
that combines many of the best characteristics of both current
feedback and voltage feedback amplifiers. The AD9631 and
AD9632 exhibit exceptionally fast and accurate pulse response
(16 ns to 0.01%) as well as extremely wide small signal and large
signal bandwidth and ultralow distortion. The AD9631 achieves
–72 dBc at 20 MHz, and 320 MHz small signal and 175 MHz
large signal bandwidths.
These characteristics position the AD9631/AD9632 ideally for
driving flash as well as high resolution ADCs. Additionally, the
balanced high impedance inputs of the voltage feedback archi-
tecture allow maximum flexibility when designing active filters.
The AD9631/AD9632 are offered in the industrial (–40 C to
+85 C) temperature range. They are available in PDIP and SOIC.
FREQUENCY – Hz
–30
10k
100k
1M
10M
100M
–50
–70
–90
–110
–130
SECOND HARMONIC
THIRD HARMONIC
VS = 5V
RL = 500
VO = 2V p-p
Figure 1. AD9631 Harmonic Distortion vs.
Frequency, G = +1
GENERAL DESCRIPTION
The AD9631 and AD9632 are very high speed and wide band-
width amplifiers. They are an improved performance alternative
to the AD9621 and AD9622. The AD9631 is unity gain stable.
The AD9632 is stable at gains of 2 or greater. Using a voltage
feedback architecture, the AD9631/AD9632’s exceptional settling
time, bandwidth, and low distortion meet the requirements of
many applications that previously depended on current feedback
amplifiers. Its classical op amp structure works much more
predictably in many designs.


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