Triple, Wideband, Fixed Gain

BUFFER AMPLIFIER With Disable

OPA3682

®

FEATURES

q INTERNALLY FIXED GAIN: +2 or

q HIGH BANDWIDTH (G = +2): 240MHz

q LOW SUPPLY CURRENT: 6mA/ch

q LOW DISABLED CURRENT: 320

q HIGH OUTPUT CURRENT: 150mA

q OUTPUT VOLTAGE SWING:

q

q IMPROVED HIGH FREQUENCY PINOUT

APPLICATIONS

q RGB VIDEO LINE DRIVER

q VIDEO MULTIPLEXERS

q MULTIPLE LINE VIDEO D/As

q PORTABLE INSTRUMENTS

q ADC BUFFERS

q ACTIVE FILTERS

q WIDEBAND DIFFERENTIAL RECEIVERS

TM

DESCRIPTION

The OPA3682 provides an easy-to-use, broadband fixed

gain, triple buffer amplifier. Depending on the external

connections, the internal resistor network may be used to

provide either a fixed gain of +2 video buffer, or a gain

of +1 or –1 voltage buffer. Operating on a very low

6mA/ch supply current, the OPA3682 offers a slew rate

and output power normally associated with a much

higher supply current. A new output stage architecture

delivers high output current with minimal headroom and

crossover distortion. This gives exceptional single-sup-

ply operation. Using a single +5V supply, the OPA3682

can deliver a 1V to 4V output swing with over 100mA

drive current and 200MHz bandwidth. This combination

of features makes the OPA3682 an ideal RGB line driver

or single-supply, triple ADC input driver.

The OPA3682’s low 6mA/ch supply current is precisely

trimmed at 25

°C. This trim, along with low drift over

temperature, guarantees lower maximum supply current

than competing products that report only a room tempera-

ture nominal supply current. 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 OPA3682 supply current drops

to less than 320

µA/ch while the output goes into a high

impedance state. This feature may be used for either power

savings or for video MUX applications.

PDS-1496B

Printed in U.S.A. June, 1999

1/3

OPA3682

400

Ω

400

Ω

75.0

Ω

75.0

Ω

RG-59

V

R

1/3

OPA3682

400

Ω

400

Ω

75.0

Ω

75.0

Ω

RG-59

V

G

1/3

OPA3682

400

Ω

400

Ω

75.0

Ω

75

Ω Cable

75

Ω Cable

75

Ω Cable

75.0

Ω

RG-59

V

B

Video RGB Amplifier

OPA3682 RELATED PRODUCTS

SINGLES

DUALS

TRIPLES

Voltage Feedback

OPA680

OPA2680

OPA3680

Current Feedback

OPA681

OPA2681

OPA3681

Fixed Gain

OPA682

OPA2682

OPA3682

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111

Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

OPA3

682

OPA3682

For most current data sheet and other product

information, visit www.burr-brown.com