AD71028

www.DataSheet4U.com Dual Digital BTSC Encoder with Integrated DAC AD71028 FEATURES 2 complete independent BTSC encoders Pilot tone generator Includes subcarrier modulation Typical 23 dB to 27 dB separation, 16 dB minimum Signal bandwidth of 14 kHz Phat-StereoTM algorithm for stereo image enhancement Dialog enhancement function for playing wide dynamic range video sources over built-in TV speakers Includes L-R dual-band compressor SPI® port for control of modes and effects Differential output for optimum performance DAC performance: 92 dB dynamic range, –92 dB THD+N Output level control for setting aural carrier deviation Flexible serial data port with right-justified, left-justified, I2S compatible, and DSP serial port modes 48-lead LQFP plastic package PRODUCT OVERVIEW The AD71028 dual digital BTSC encoder provides two complete digital BTSC encoder channels, including the pilot-tone generation and subcarrier mixing functions. Two built-in high performance DACs are provided to output the BTSC baseband composite signal. The output of the AD71028 can be connected with minimal external circuitry to the input of a 4.5 MHz aural FM modulator. In addition to the BTSC encoders, the AD71028 also includes a stereo image enhancement function, Phat Stereo, to increase the sense of spaciousness available from closely spaced TV loudspeakers. A dialog enhancement algorithm is also included to solve the problem of playing wide dynamic range sources over limited-performance TV speakers and...