Add to Signal Chain Designer

AD1970:  Complete MTS (BTSC) TV Stereo Encoder

Product Details

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.


  • 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

Functional Block Diagram for AD1970


Title Content Type File Type
AD1970: Digital BTSC Encoder with Integrated ADC and DAC Data Sheet (Rev 0, 05/2005) (pdf, 443 kB) Data Sheets PDF
Encoder's Spare Channel Embeds Whole-House Stereo Audio in Satellite Set-Top-Box Designs Stably and Cost-Effectively
by Jeritt Kent and Victor Chang, Analog Devices, Inc. (Analog Dialogue, Vol. 39, July 2005)
Analog Dialogue HTML
Audio Processors, Amplifiers Deliver Complete HDTV Audio Subsystem
(EE Times, 10/1/2007)
Product Reviews HTML
ADI: Analog Essential To HDTV Experience
(Electronic Design, 10/1/2007)
Product Reviews HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

AD1970 Model Options
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

content here.
content here.

Review this Product