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.

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

APPLICATIONS

Digital set-top box BTSC encoder