Texas Instruments Incorporated (TI) announced an ultra-wideband, fixed-gain video buffer amplifier from the company's Burr-Brown product line providing gains of +1, -1 or +2 using internal resistors. The combination of high bandwidth (700 MHz), high slew rate (2500 V/us), and low supply current (13 mA) makes the OPA693 an ideal video line driver or analog-to-digital converter input driver.
"The OPA693 eclipses previous video line driver solutions, providing an unsurpassed pulse response for emerging high resolution RGB applications. In addition to being the fastest +/-5 V capable fixed-gain amplifier on the market, the OPA693 offers considerably improved DC and AC precision at lower pricing than competitive devices," said Michael Steffes, strategic marketing manager for TI's high-speed signal processing group. "Video applications will benefit from the exceptional pulse fidelity at high pixel rates offered by the 700 MHz bandwidth and 2500 V/us slew rate. The OPA693 is also the only fixed gain of +2 video line driver in the >250 MHz speed range that is capable of operating on a single supply from +5 V to +12 V."
The OPA693 features an optional disable function for further system power reduction. Under normal operating conditions, the OPA693 uses only 13 mA supply current. The supply current drops to less than 170 uA when the disable control pin is pulled low.
Example Application Block Diagram
Depending on the external connections, the internal resistor network may be used to provide either a fixed gain of +2 video buffer or a +/-1 voltage buffer with better than 1% gain accuracy. A new output stage architecture delivers high output current with a minimal headroom and crossover distortion, allowing exceptional single-supply operation. Using a single +5 V supply, the OPA693 can deliver a 2 Vpp output swing with over 90 mA drive current and 400 MHz bandwidth at a gain of +2.
Texas Instruments Incorporated Semiconductor Group, SC-03251 Literature Response Center P.O. Box 954 Santa Clarita, CA 91380 Tel: 1-800-477-8924