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Dual Wideband, Current-Feedback

OPERATIONAL AMPLIFIER With Disable

DESCRIPTION

The OPA2691 sets a new level of performance for broadband dual

current-feedback op amps. Operating on a very low 5.1mA/ch

supply current, the OPA2691 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 headroom and crossover distortion. This gives exceptional

single-supply operation. Using a single +5V supply, the OPA2691

can deliver a 1V to 4V output swing with over 150mA drive current

and 190MHz bandwidth. This combination of features makes the

OPA2691 an ideal RGB line driver or single-supply Analog-to-Digital

Converter (ADC) input driver.

FEATURES

q FLEXIBLE SUPPLY RANGE:

+5V to +12V Single Supply

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

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

q HIGH OUTPUT CURRENT: 190mA

q OUTPUT VOLTAGE SWING:

q HIGH SLEW RATE: 2100V/

q LOW SUPPLY CURRENT: 5.1mA/ch

q LOW DISABLED CURRENT: 150

APPLICATIONS

q xDSL LINE DRIVER / RECEIVER

q MATCHED I/Q CHANNEL AMPLIFIER

q BROADBAND VIDEO BUFFERS

q HIGH-SPEED IMAGING CHANNELS

q PORTABLE INSTRUMENTS

q DIFFERENTIAL ADC DRIVERS

q ACTIVE FILTERS

q WIDEBAND INVERTING SUMMING

The OPA2691’s low 5.1mA/ch supply current is precisely trimmed at

25

°C. This trim, along with low drift over temperature, ensures lower

maximum supply current than competing products. System power

may be further reduced by using the optional disable control pin

(SO-14 only). Leaving this disable pin open, or holding it HIGH,

gives normal operation. If pulled LOW, the OPA2691 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.

Single-Supply ADSL Upstream Driver

100

Ω

2k

Ω

2k

Ω

1

µF

12.4

Ω

100

Ω

2Vp-p

324

Ω

324

Ω

1/2

OPA2691

1/2

OPA2691

+12V

1:2

15Vp-p

12.4

Ω

+6.0V

OPA2691 RELATED PRODUCTS

SINGLES

DUALS

TRIPLES

Voltage-Feedback

OPA690

OPA2690

OPA3690

Current-Feedback

OPA691

OPA2681

OPA3691

Fixed Gain

OPA692

—

OPA3692

OPA

269

1

OPA2

691

OPA2691

SBOS224D – 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.

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.

18

17

16

15

14

13

12

Frequency (MHz)

0.1

1

10

100 200

SINGLE-SUPPLY ADSL UPSTREAM DRIVER

SMALL-SIGNAL FREQUENCY RESPONSE

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