AD1970

www.DataSheet4U.com Digital BTSC Encoder with Integrated ADC and DAC AD1970 FEATURES Complete BTSC encoder Pilot tone generator Includes subcarrier modulation Channel separation: 30 dB Bandwidth up to 14 kHz Stereo analog or digital input Phat-Stereo™ 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 I2C port for control of modes, effects, and parameters Analog input performance 74 dB dynamic range −72 dB THD + N Digital input performance 87 dB dynamic range −83 dB THD + N Integrated op amps for analog inputs and outputs Single-ended output reduces external part count Integrated PLL generates all clocks from composite video, 48 kHz sample clock, or high speed master clock Sync stripper to recover video clock from composite video signal Output level control for setting aural carrier deviation Macrovision™-compliant Dolby™ RF mode-compatible 48-pin LQFP plastic package APPLICATIONS Digital set top box DVD player DVD recorder GENERAL DESCRIPTION The AD1970 is a complete analog or digital-in, analog-out BTSC encoder which includes pilot-tone generation and subcarrier mixing functions. The stereo ADC provides the means for digitization of the analog baseband audio signal. A built-in high performance DAC is provided to output the BTSC baseband composite signal. The output of the AD1970 can be connected with minimal external circuitry to the input of a 4.5 M...