OPA3
OPA3691
691
OPA3
691
SBOS227A – DECEMBER 2001 – REVISED OCTOBER 2002
Triple Wideband, Current-Feedback
OPERATIONAL AMPLIFIER With Disable
FEATURES
q
FLEXIBLE SUPPLY RANGE:
+5V to +12V Single-Supply
±
2.5V to
±
6V Dual Supply
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UNITY-GAIN STABLE: 280MHz (G = 1)
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HIGH OUTPUT CURRENT: 190mA
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OUTPUT VOLTAGE SWING:
±
4.0V
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HIGH SLEW RATE: 2100V/
µ
s
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LOW SUPPLY CURRENT: 5.1mA/ch
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LOW DISABLED CURRENT: 150
µ
A/ch
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IMPROVED HIGH-FREQUENCY PINOUT
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WIDEBAND +5V OPERATION: 190MHz (G = +2)
DESCRIPTION
The OPA3691 sets a new level of performance for broad-
band, triple current-feedback op amps. Operating on a very
low 5.1mA/ch supply current, the OPA3691 offers a slew
rate and output power normally associated with a much
higher supply current. A new output stage architecture
delivers a high output current with minimal voltage head-
room and crossover distortion. This gives exceptional single-
supply operation. Using a single +5V supply, the OPA3691
can deliver a 1V to 4V output swing with over 120mA drive
current and 150MHz bandwidth. This combination of fea-
tures makes the OPA3691 an ideal RGB line driver or
single-supply Analog-to-Digital Converter (ADC) input driver.
The OPA3691’s low 5.1mA/ch supply current is precisely
trimmed at 25°C. This trim, along with low drift over tem-
perature, ensures lower maximum supply current than com-
peting products. System power may be further reduced by
using the optional disable control pin. Leaving this disable
pin open, or holding it HIGH, gives normal operation. If
pulled LOW, the OPA3691 supply current drops to less than
150µA/ch while the output goes into a high impedance
state. This feature may be used for power savings.
APPLICATIONS
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RGB AMPLIFIERS
WIDEBAND INA
BROADBAND VIDEO BUFFERS
HIGH-SPEED IMAGING CHANNELS
PORTABLE INSTRUMENTS
ADC BUFFERS
ACTIVE FILTERS
CABLE DRIVERS
+5V
V
1
1/3
OPA3691
OPA3691 RELATED PRODUCTS
SINGLES
Voltage-Feedback
Current-Feedback
Fixed Gain
OPA690
OPA691
OPA692
DUALS
OPA2690
OPA2691
—
TRIPLES
OPA3690
OPA3681
OPA3692
HIGH-SPEED INA FREQUENCY RESPONSE
–5V
301Ω
250Ω
66.5Ω
301Ω
250Ω
+5V
1/3
OPA3691
25
10 (V
1
– V
2
)
20
Gain (dB)
–5V
499Ω
15
10
+5V
1/3
OPA3691
499Ω
5
V
2
–5V
0
High-Speed INA (120MHz)
0.1
1
10
Frequency (MHz)
100
400
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 2001, Texas Instruments Incorporated
www.ti.com
BURR-BROWN [ BURR-BROWN CORPORATION ]
