Typical applications

description

LT^®The 6600-20 combines a fully differential amplifier with a 4th-order 20MHz low-pass filter that approximates Chebyshev's frequency response. Most differential amplifiers require many precision external components to trim gain and bandwidth. In a big difference, with the LT6600-20, the differential gain can be set by two external resistors, and the filter's 20MHz cutoff frequency and passband ripple are set internally. The LT6600-20 also provides the level shifts necessary to set its output common-mode voltage to accommodate the reference voltage requirements of A/D.

The LT6600-20 uses a proprietary internal architecture that integrates an antialiasing filter and a differential amplifier/driver without sacrificing distortion or low noise performance. At unity gain, an impressive in-band signal-to-noise ratio is measured. At higher gains, the noise from the input decreases, allowing the device to handle smaller input differential signals without significant degradation of the output signal-to-noise ratio.

The LT6600-20 also has the ability to operate in low voltage conditions. The differential design is provided for a 2V_P-PExcellent performance at signal levels, and the device operates from a single 3V supply.

The LT6600-20 is available in an SO-8 package and is pin compatible with standalone differential amplifiers.

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• High-speed ADC antialiasing and DAC filtering processing in network or cellular base station applications
• High-speed test and measurement equipment
• Medical imaging
• A drop-in replacement component for differential amplifiers