OPA693
OPA693
OPA693
SBOS257A – AUGUST 2002 – REVISED JUNE 2003
Ultra-Wideband, Fixed Gain
Video BUFFER AMPLIFIER with Disable
DESCRIPTION
FEATURES
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 or –1 voltage
buffer. Operating on a low 13mA supply current, the OPA693
offers a slew rate (2500V/µs) and bandwidth (> 800MHz)
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 OPA693 can deliver a 2.5VPP swing with over
80mA drive current and 500MHz bandwidth at a gain of +2.
This combination of features makes the OPA693 an ideal
RGB line driver or single-supply undersampling Analog-to-
Digital Converter (ADC) input driver.
● VERY HIGH BANDWIDTH (G = +2): 800MHz
● FLEXIBLE SUPPLY RANGE:
+5V to +12V Single Supply
±2.5V to ±6V Dual Supplies
● INTERNALLY FIXED GAIN: +2 or ±1
● LOW SUPPLY CURRENT: 13mA
● LOW DISABLED CURRENT: 120µA
● HIGH OUTPUT CURRENT: 100mA
● OUTPUT VOLTAGE SWING: ±4.0V
● SOT23-6 AVAILABLE
APPLICATIONS
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 120µA while the
output goes into a high impedance state. This feature may be
used for power savings.
● BROADBAND VIDEO LINE DRIVERS
● MULTIPLE LINE VIDEO DA
● PORTABLE INSTRUMENTS
● ADC BUFFERS
● ACTIVE FILTERS
● HFA1112 IMPROVED DROP-IN
OPA693 RELATED PRODUCTS
SINGLES
OPA690
OPA691
OPA692
DUALS
OPA2690
OPA2691
—
TRIPLES
OPA3690
OPA3691
OPA3692
Voltage Feedback
Current Feedback
Fixed Gain
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.
OPA693
1
2
3
4
300Ω
8
7
6
5
DIS
75Ω
300Ω
+5V
Video
In
RG-59
75Ω
75Ω
–5V
75Ω
RG-59
75Ω
SO-8
G = +2
800MHz, 2-Output Component Video DA
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.
Copyright © 2002-2003, Texas Instruments Incorporated
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
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