OPA6

91

OPA6

91

Wideband, Current Feedback

OPERATIONAL AMPLIFIER With Disable

DESCRIPTION

The OPA691 sets a new level of performance for broadband

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

supply current, the OPA691 offers a slew rate and output

power normally associated with a much higher supply cur-

rent. A new output stage architecture delivers a high output

current with minimal voltage headroom and crossover distor-

tion. This gives exceptional single-supply operation. Using a

single +5V supply, the OPA691 can deliver a 1V to 4V output

swing with over 150mA drive current and 190MHz band-

width. This combination of features makes the OPA691 an

ideal RGB line driver or single-supply Analog-to-Digital Con-

verter (ADC) input driver.

The OPA691’s low 5.1mA supply current is precisely trimmed

at 25

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

FEATURES

q FLEXIBLE SUPPLY RANGE:

+5V to +12V Single-Supply

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

q HIGH OUTPUT CURRENT: 190mA

q OUTPUT VOLTAGE SWING:

q HIGH SLEW RATE: 2100V/

q LOW dG/dφ: 0.07% /0.02

°

q LOW SUPPLY CURRENT: 5.1mA

q LOW DISABLED CURRENT: 150

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

APPLICATIONS

q xDSL LINE DRIVER

q BROADBAND VIDEO BUFFERS

q HIGH-SPEED IMAGING CHANNELS

q PORTABLE INSTRUMENTS

q ADC BUFFERS

q ACTIVE FILTERS

q WIDEBAND INVERTING SUMMING

q HIGH SFDR IF AMPLIFIER

ensures lower maximum supply current than competing

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

OPA691 supply current drops to less than 150

µA while the

output goes into a high impedance state. This feature may be

used for power savings.

OPA691

SBOS226A – DECEMBER 2001– REVISED SEPTEMBER 2002

OPA691 RELATED PRODUCTS

SINGLES

DUALS

TRIPLES

Voltage Feedback

OPA690

OPA2690

OPA3690

Current Feedback

OPA681

OPA2691

OPA3691

Fixed Gain

OPA692

OPA3692

100

Ω

50

Ω

OPA691

+5V

DIS

–5V

V

100MHz, –1dB Compression = 15dBm

50

Ω

V

2

50

Ω

V

3

50

Ω

V

4

50

Ω

V

1

50

Ω

RG-58

50

Ω

V

5

30

Ω

200MHz RF Summing Amplifier

www.ti.com

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

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.