AD9630 Datasheet, PDF (1/7 Pages) Analog Devices – Low Distortion 750 MHz Closed-Loop Buffer Amp

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FEATURES
Excellent Gain Accuracy: 0.99 V/V
Wide Bandwidth: 750 MHz
Slew Rate: 1200 V/␮s
Low Distortion
–65 dBc @ 20 MHz
–80 dBc @ 4.3 MHz
Settling Time
5 ns to 0.1%
8 ns to 0.02%
Low Noise: 2.4 nV/√Hz
Improved Source for CLC-110
APPLICATIONS
IF/Communications
Impedance Transformations
Drives Flash ADCs
Line Driving
Low Distortion 750 MHz
Closed-Loop Buffer Amp
AD9630*
PIN CONFIGURATION
+V_S 1
** 2
8 OUTPUT
7 NC
NC 3
INPUT 4
6 ***
AD9630 ^{5 –VS}
NC = NO CONNECT
**OPTIONAL +V_S
***OPTIONAL –V_S
NOTE: FOR BEST SETTLING TIME PERFORMANCE USE
OPTIONAL POWER SUPPLIES. ALL SPECIFICATIONS
ARE BASED ON USING SINGLE ؎V_S CONNECTIONS,
EXCEPT FOR SETTLING TIME TO 0.02% AND SMALL
SIGNAL S21. CONSULT THE FACTORY FOR VERSIONS
WITH OPTIONAL POWER SUPPLY PINS DISCONNECTED
INTERNAL TO THE PACKAGE.
GENERAL DESCRIPTION
The AD9630 is a monolithic buffer amplifier that utilizes a
patented, innovative, closed-loop design technique to achieve
exceptional gain accuracy, wide bandwidth, and low distortion.
Slew rate limiting has been overcome as indicated by the
1200 V/µs slew rate; this improvement allows the user greater
flexibility in wideband and pulse applications. The second har-
monic distortion terms for an analog input tone of 4.3 MHz
and 20 MHz are –80 dBc and –66 dBc, respectively. Clearly,
the AD9630 establishes a new standard by combining out-
standing dc and dynamic performance in one part.
The large signal bandwidth, low distortion over frequency, and
drive capabilities of the AD9630 make the buffer an ideal flash
ADC driver. The AD9630 provides better signal fidelity than
many of the flash ADCs that it has been designed to drive.
Other applications that require increased current drive at unity
voltage gain (such as cable driving) benefit from the AD9630’s
performance.
The AD9630 is available in plastic DIP (N) and SOIC (R).
*Protected under U.S. patent numbers 5,150,074 and 5,537,079.
REV. B
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© Analog Devices, Inc., 1999