OPA
廬
OPA
622
OPA622
622
Wide-Bandwidth
OPERATIONAL AMPLIFIER
FEATURES
q
LARGE SIGNAL BANDWIDTH:
150MHz (AP), 200MHz (AU)
(Voltage-Feedback)
q
HIGH OUTPUT CURRENT:
鹵
70mA
q
SLEW RATE: 1500V/
碌
s (AP), 1700V/
碌
s (AU)
q
DIFFERENTIAL GAIN: 0.15%
q
DIFFERENTIAL PHASE: 0.08
擄
q
EXCELLENT BANDWIDTH/SUPPLY
CURRENT RATIO: 200MHz/5mA
q
LOW INPUT BIAS CURRENT: 鈥?.2
碌
A
APPLICATIONS
q
BROADCAST/HDTV EQUIPMENT
q
COMMUNICATIONS
q
PULSE/RF AMPLIFIERS
q
ACTIVE FILTER
q
HIGH SPEED ANALOG SIGNAL
PROCESSING
q
MULTIPLIER OUTPUT AMP
q
DIFFERENTIATOR FOR DIGITIZED
VIDEO SIGNALS
The feedback buffer stage provides 700MHz band-
width, a very high slew rate, and a very short signal
delay time. It is designed primarily for interstage
buffering and not for driving long cables. When com-
bined with the current-feedback amplifier section, the
OPA622 can be interconnected as a voltage-feedback
amplifier with two identical high-impedance inputs.
In this configuration, it features a low common-mode
gain, low input offset, and, due to the delay time of the
additional feedback buffer, a decrease in frequency
bandwidth compared with the current-feedback
configuration. Unlike 鈥渃lassical鈥?operational amplifi-
ers, the OPA622 achieves a nearly constant bandwidth
over a wide gain and output voltage range. The
external setting of the open-loop gain with R
OG
avoids
a large compensation capacitor, improves the slew
rate, and allows a frequency response adaption to
various gains and load conditions.
R
2
R
1
50鈩?/div>
V
OUT
DESCRIPTION
The OPA622 is a monolithic amplifier component
designed for precision wide-bandwidth systems
including high-resolution video, RF and IF circuitry,
and communications equipment. It includes a mono-
lithic integrated current-feedback operational
amplifier block and a voltage buffer block, which,
when combined, form a voltage-feedback operational
amplifier.
When combined as a current-feedback amplifier, it
provides a 280MHz large-signal bandwidth at
鹵2.5V
output level and a 1700V/碌s slew rate. The output
buffer stage can deliver
鹵70mA
output current. The
high output current capability allows the OPA622 to
drive two 50鈩?or 75鈩?lines with
鹵3V
output swing,
making it ideal along with the low differential
gain/phase errors for RF, IF, and video applications.
R
2
VOLTAGE-FEEDBACK
CURRENT-FEEDBACK
R
1
R
IN
V
IN
50鈩?/div>
C
OTA
10
9
OPA622
VFA
8
4
BUF鈥?/div>
+In
13
2
BUF+
R
OG
3
鈥揑n
I
Q
Adjust
R
Q
鈥?V
13
BUF+
OPA622
CFA
C
OTA
10
9
3
2
100鈩?/div>
50鈩?/div>
V
OUT
R
IN
V
IN
50鈩?/div>
4
+In
I
Q
Adjust
R
Q
鈥?V
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400
Tel: (520) 746-1111 鈥?Twx: 910-952-1111 鈥?Cable: BBRCORP 鈥?/div>
漏 1991 Burr-Brown Corporation
鈥?Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd. 鈥?Tucson, AZ 85706
Telex: 066-6491 鈥?FAX: (520) 889-1510 鈥?Immediate Product Info: (800) 548-6132
PDS-1131E
Printed in U.S.A. March, 1995
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