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VCA610UA Datasheet

  • VCA610UA

  • WIDEBAND VOLTAGE CONTROLLED AMPLIFIER

  • 214.75KB

  • 12頁

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廬
VCA
610
VCA610
VCA
610
WIDEBAND
VOLTAGE CONTROLLED AMPLIFIER
FEATURES
q
WIDE GAIN CONTROL RANGE: 80dB
q
SMALL PACKAGE: 8-pin SOIC or DIP
q
WIDE BANDWIDTH: 30MHz
q
LOW VOLTAGE NOISE: 2.2nV/
鈭?/div>
Hz
q
FAST GAIN SLEW RATE: 300dB/
碌
s
q
EASY TO USE
APPLICATIONS
q
OPTICAL DISTANCE MEASUREMENT
q
AGC AMPLIFIER
q
ULTRASOUND
q
SONAR
q
ACTIVE FILTERS
q
LOG AMPLIFIER
q
IF CIRCUITS
q
CCD CAMERAS
DESCRIPTION
The VCA610 is a wideband, continuously variable,
voltage controlled gain amplifier. It provides linear-
dB gain control with high impedance inputs. It is
designed to be used as a flexible gain control element
in a variety of electronic systems.
The VCA610 has a gain control range of 80dB (鈥?0dB
to +40dB) providing both gain and attenuation for
maximum flexibility in a small 8-lead SO-8 or plastic
dual-in-line package. The broad attenuation range can
be used for gradual or controlled channel turn-on and
turn-off for applications in which abrupt gain changes
can create artifacts or other errors. In addition, the
output can be disabled to provide 鈥?0dB of attenua-
tion. Group delay variation with gain is typically less
than
鹵2ns
across a bandwidth of 1 to 15MHz.
The VCA610 has a noise figure of 3.5dB (with an R
S
of 200鈩? including the effects of both current and
voltage noise. Instantaneous output dynamic range is
70dB for gains of 0dB to +40dB with 1MHz noise
bandwidth. The output is capable of driving 100鈩?
The high speed, 300dB/碌s, gain control signal is a
unipolar (0 to 鈥?V) voltage that varies the gain lin-
early in dB/V.
The VCA610 is designed with a very fast overload
recovery time of only 200ns. This allows a large
signal transient to overload the output at high gain,
without obscuring low-level signals following closely
behind. The excellent overload recovery time and
distortion specifications optimize this device for low-
level doppler measurements.
+5V 鈥?V
6
7
2
鈥揑n
+In
V
C
Gain
Control
8
5
1
3
V
OUT
VCA610
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400, Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 鈥?Tel: (520) 746-1111 鈥?Twx: 910-952-1111
Internet: http://www.burr-brown.com/ 鈥?FAXLine: (800) 548-6133 (US/Canada Only) 鈥?Cable: BBRCORP 鈥?Telex: 066-6491 鈥?FAX: (520) 889-1510 鈥?Immediate Product Info: (800) 548-6132
漏
1992 Burr-Brown Corporation
PDS-1140D
Printed in U.S.A. January, 1995

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