TI Debuts Current-Feedback Amplifier for Video and Wireless Applications

1/16/2004 - Texas Instruments Incorporated (TI) (NYSE: TXN) announced a low-power, current-feedback amplifier from the company´s Burr-Brown product line, which offers unmatched bandwidth at low and high gains. The device is designed for applications in video signal processing, cable modems, wireless communications and test instrumentation.

At higher gains (G = +8), the OPA695 offers 4300V/usec slew rate and >450MHz bandwidth, providing a low-power solution for Intermediate Frequency (IF) amplifier applications. Capable of single supply +5V to +12V operation, the OPA695 gives an improved output intercept at lower power than existing dedicated IF amplifiers. At lower gains (G = +2), popular for video line driving, the OPA695 offers 1.4GHz bandwidth with 2500V/usec slew rate, covering the highest speed video requirements.

"The OPA695 establishes a new performance level for wideband current feedback amplifiers. No other competitive device can match the bandwidth at a gain of +2, nor hold a high bandwidth to higher gains as well as the OPA695," said Michael Steffes, strategic marketing manager for TI's high-speed signal processing group. "Wireless communication applications will benefit from this low power, low cost, high dynamic range IF amplifier, while high-resolution RGB applications will enjoy exceptional pulse fidelity through the highest pixel update rates."

The low 12.9mA supply current is precisely trimmed at +25C. This trim, along with low quiescent current shift over a wide temperature range, gives low system power over temperature. Fully specified over both the commercial (0 C to +70 C) and industrial temperature (-40 C to +85 C) ranges, the OPA695 shows minimal drop-off in performance at the temperature extremes. Using the optional disable control pin, the OPA695 supply current may be further reduced to less than 170uA. This power-saving feature, along with exceptional single +5V operation and ultra-small SOT23-6 packaging, will be attractive to wideband amplifier requirements in portable applications.

Additional features include low input voltage noise (1.8nV/rtHz), high 3rd-order intercept (>30dBm through 120MHz), high output swing (+/-4.2V on +/-5V supply) and instrumentation level dG/dP (0.04 /0.01 ) for composite video applications.

Available Today
The OPA695 is packaged in both an SO-8 and SOT23-6 in industry standard pinouts. The OPA695ID (SO-8 package) is available now from TI and its authorized distributors. The device is priced from $1.35 in 1,000 piece quantities (suggested resale pricing). The OPA695IDBV (SOT23-6 package) will be available in February 2004.

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