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Triple Wideband, Current-Feedback

OPERATIONAL AMPLIFIER With Disable

FEATURES

q FLEXIBLE SUPPLY RANGE:

+5V to +12V Single-Supply

±2.5V to ±6V Dual Supply

q UNITY-GAIN STABLE: 280MHz (G = 1)

q HIGH OUTPUT CURRENT: 190mA

q OUTPUT VOLTAGE SWING:

±4.0V

q HIGH SLEW RATE: 2100V/

µs

q LOW SUPPLY CURRENT: 5.1mA/ch

q LOW DISABLED CURRENT: 150

µA/ch

q IMPROVED HIGH-FREQUENCY PINOUT

q WIDEBAND +5V OPERATION: 190MHz (G = +2)

APPLICATIONS

q RGB AMPLIFIERS

q WIDEBAND INA

q BROADBAND VIDEO BUFFERS

q HIGH-SPEED IMAGING CHANNELS

q PORTABLE INSTRUMENTS

q ADC BUFFERS

q ACTIVE FILTERS

q CABLE DRIVERS

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

150

µA/ch while the output goes into a high impedance

state. This feature may be used for power savings.

OPA3691

SBOS227E – DECEMBER 2001 – REVISED JULY 2008

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Copyright © 2001-2008, Texas Instruments Incorporated

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.

OPA3691 RELATED PRODUCTS

SINGLES

DUALS

TRIPLES

Voltage-Feedback

OPA690

OPA2690

OPA3690

Current-Feedback

OPA691

OPA2691

OPA3681

Fixed Gain

OPA692

—

OPA3692

66.5

Ω

High-Speed INA (120MHz)

499

Ω

499

Ω

301

Ω

301

Ω

1/3

OPA3691

1/3

OPA3691

1/3

OPA3691

V

1

10 (V

1 – V2)

V

2

+5V

–5V

+5V

–5V

+5V

–5V

250

Ω

250

Ω

OPA369

1

OPA3691

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.

25

20

15

10

5

0

Frequency (MHz)

HIGH-SPEED INA FREQUENCY RESPONSE

0.1

1

10

100

400

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