AD1970
ObsoleteComplete MTS (BTSC) TV Stereo Encoder
Part Details
- Complete BTSC encoder
- Channel separation: 30 dB
- 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
- Integrated PLL generates all clocks from composite video, 48 kHz sample clock, or high speed master clock
- I2C port for control of modes, effects, and parameters x
- Analog input performance
74 dB dynamic range
−72 dB THD + N - Digital input performance
87 dB dynamic range
−83 dB THD + N - Sync stripper to recover video clock from composite video signal
- Output level control for setting aural carrier deviation
The AD1970 is an analog or digital in, analog out TV Stereo Digital Audio Processor with programmable MTS (BTSC) encoder which includes pilot-tone generation and sub-carrier 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 base-band composite signal. The output of the AD1970 can be connected with minimal external circuitry to the input of a 4.5 MHz aural FM modulator.
In addition to the digital BTSC encoder, the AD1970 includes a stereo image enhancement function, Phat Stereo, to increase the sense of spaciousness available from closely spaced TV loudspeakers. A dialog enhancement algorithm solves the problem of playing wide dynamic range sources over limited-performance TV speakers and amplifiers. An I2C port allows control of the AD1970’s registers and parameters.
Documentation
Obsolete Data Sheet 1
This is the most up-to-date revision of the Data Sheet.
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