Ultra-Wideband, Fixed Gain

Video BUFFER AMPLIFIER with Disable

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OPA6

93

OPA6

93

OPA693

SBOS285A – OCTOBER 2003 – REVISED JULY 2008

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DESCRIPTION

The OPA693 provides an easy to use, broadband, fixed gain

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 voltage buffer.

Operating on a low 13mA supply current, the OPA693 offers

a slew rate (2500V/

µs) and bandwidth (> 700MHz) normally

associated with a much higher supply current. A new output

stage architecture delivers high output current with a minimal

headroom and crossover distortion. This gives exceptional

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

current and 500MHz bandwidth at a gain of +2. This combi-

nation of features makes the OPA693 an ideal RGB line

driver or single-supply undersampling Analog-to-Digital Con-

verter (ADC) input driver.

The OPA693’s low 13mA supply current is precisely trimmed

at 25

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

ensures lower maximum supply current than competing

products that report only a room temperature 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. This optional dis-

able allows the OPA693 to fit into existing video buffer

layouts where the disable pin is unconnected to get improved

performance with no board changes. If pulled LOW, the

OPA693 supply current drops to less than 170

µA while the

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

used for power savings.

The low gain stable current-feedback architecture used in the

OPA693 is particularly suitable for high full-power bandwidth

cable driving requirements. Where the additional flexibility of

an op amp is required, consider the OPA695 ultra-wideband

current feedback op amp. Where a unity gain stable voltage

feedback op amp with very high slew rate is required,

consider the OPA690.

FEATURES

q VERY HIGH BANDWIDTH (G = +2): 700MHz

q FLEXIBLE SUPPLY RANGE:

+5V to +12V Single Supply

q INTERNALLY FIXED GAIN: +2 or

q LOW SUPPLY CURRENT: 13mA

q LOW DISABLED CURRENT: 120

q HIGH OUTPUT CURRENT:

q OUTPUT VOLTAGE SWING:

q SOT23-6 AVAILABLE

Copyright © 2002-2008, 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.

APPLICATIONS

q BROADBAND VIDEO LINE DRIVERS

q MULTIPLE LINE VIDEO DA

q PORTABLE INSTRUMENTS

q ADC BUFFERS

q HIGH FREQUENCY ACTIVE FILTERS

q HFA1112 IMPROVED DROP-IN

OPA693 RELATED PRODUCTS

SINGLES

DUALS

TRIPLES

Voltage Feedback

OPA690

OPA2690

OPA3690

Current Feedback

OPA691

OPA2691

OPA3691

Fixed Gain

OPA692

—

OPA3692

> 900MHz

OPA695

—

—

75

Ω

Video

Out

Video

Out

75

Ω

RG-59

75

Ω

75

Ω

RG-59

75

Ω

300

Ω

300

Ω

1

2

3

4

8

7

6

5

DIS

OPA693

SO-8

G = +2

700MHz, 2-Output Component Video DA

+5V

−5V

Video

In

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.

All trademarks are the property of their respective owners.