OPA622 Datasheet, PDF (1/18 Pages) Burr-Brown (TI) – Wide-Bandwidth OPERATIONAL AMPLIFIER

OPA622
®
OPA622
OPA622
Wide-Bandwidth
OPERATIONAL AMPLIFIER
FEATURES
q LARGE SIGNAL BANDWIDTH:
150MHz (AP), 200MHz (AU)
(Voltage-Feedback)
q HIGH OUTPUT CURRENT: ±70mA
q SLEW RATE: 1500V/µs (AP), 1700V/µs (AU)
q DIFFERENTIAL GAIN: 0.15%
q DIFFERENTIAL PHASE: 0.08°
q EXCELLENT BANDWIDTH/SUPPLY
CURRENT RATIO: 200MHz/5mA
q LOW INPUT BIAS CURRENT: –1.2µA
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 ±2.5V
output level and a 1700V/µs slew rate. The output
buffer stage can deliver ±70mA output current. The
high output current capability allows the OPA622 to
drive two 50Ω or 75Ω lines with ±3V output swing,
making it ideal along with the low differential
gain/phase errors for RF, IF, and video applications.
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 “classical” 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 avoids
OG
a large compensation capacitor, improves the slew
rate, and allows a frequency response adaption to
various gains and load conditions.
R₂
VOLTAGE-FEEDBACK
CURRENT-FEEDBACK
R₂
R₁
3
C_OTA
10
R_IN
–In
OPA622
4 ^VFA
9
8
50Ω
V_OUT
V_IN
+In
BUF–
13
50Ω
2 _BUF+
R_OG
I_Q
Adjust
R_Q
–5V
R₁
C_OTA
13
V_IN
10
R_IN
BUF+
4
OPA622
CFA
3
9
+In
50Ω
V_OUT
50Ω
2
100Ω
I_Q
Adjust R_Q
–5V
International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Tel: [phone] • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
© 1991 Burr-Brown Corporation
PDS-1131E
Printed in U.S.A. March, 1995