Features and Benefits

  • 16-channel digital audio processor
  • Accepts sample rates up to 192 kHz
  • 28-bit × 28-bit multiplier with full 56-bit accumulator
  • Fully programmable program RAM for custom program download
  • Parameter RAM allows complete control of 1,024 parameters
  • Control port features safeload for transparent parameter updates and complete mode and memory transfer control
  • Target/slew RAM for click-free volume control and dynamic parameter updates
  • See data sheet for additional features

Product Details

The AD1940 / AD1941 are a complete 28-bit, single-chip, multi-channel audio SigmaDSP for equalization, multiband dynamic processing, delay compensation, speaker compensation, and image enhancement. These algorithms can be used to compen-sate for the real world limitations of speakers, amplifiers, and listening environments, resulting in a dramatic improvement of perceived audio quality.

The signal processing used in the AD1940 / AD1941 is comparable to that found in high end studio equipment. Most of the processing is done in full, 56-bit double-precision mode, resulting in very good, low level signal performance and the absence of limit cycles or idle tones. The dynamics processor uses a sophisticated, multiple-breakpoint algorithm often found in high end broadcast compressors.

The AD1940 / AD1941 are a fully programmable DSP. Easy to use software allows the user to graphically configure a custom signal processing flow using blocks such as biquad filters, dynamics processors, and surround sound processors. An extensive control port allows click-free parameter updates, along with readback capability from any point in the algorithm flow.

The AD1940 / AD1941’s digital input and output ports allow a glueless connection to ADCs and DACs by multiple, 2-channel serial data streams or TDM data streams. When in TDM mode, the AD1940 / AD1941 can input 8 or 16 channels of serial data, and can output 8 or 16 channels of serial data. The input and output port configurations can be individually set. The AD1940 is controlled by a 4-wire SPI® port; the AD1941 is controlled by a 2-wire I2C® bus. Other than the control interface, the functions of the two parts are identical.


  • Automotive sound systems
  • Digital televisions
  • Home theater systems (Dolby digital/DTS postprocessor)
  • Multichannel audio systems
  • Mini-component stereos
  • Multimedia audio
  • Digital speaker crossover
  • Musical instruments
  • In-seat sound systems (aircrafts/motor coaches)

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

Software & Systems Requirements

Software Development Tools

Tools & Simulations

Product Recommendations

AD1940 Companion Parts

Recommended Audio DAC

  • For a high performance, 16-channel, differential output DAC: ADAU1966.

Recommended I2S MEMS Microphone

  • For a high performance, low power, complete microphone solution: ADMP441.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

Sample & Buy

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.