Sigma-Delta DACs for Cost Effective Conversions

The Intrinsix Sigma-Delta DACs for Cost Effective Conversions (SD-DAC-CEC) are part of the larger offering of Sigma-Delta IP available from Intrinsix. 

The family of SD-DAC-CEC IP is generated utilizing proprietary, patent-pending techniques within the Intrinsix SDM Refinery toolset.  A Sigma-Delta Modulator DAC leverages digital gates to perform data converter functions.  A high Signal to Noise Ratio (SNR) is achieved by pushing the quantization noise to high frequencies outside the band of interest.  The challenge in Sigma-Delta DAC design is the "shaping" of this noise, which is characterized by the Noise Transfer Function (NTF), and the design of efficient filters to attenuate the high frequency noise.  The SDM Refinery automates this process:  The engineer specifies an Over-Sampling Ratio (OSR), quantization levels, order of complexity and center frequency and SDM Refinery creates the desired DAC.  The Intrinsix SDM Refinery also designs high efficiency polyphase half-band interpolation filters to ease some of the system level performance requirements.

Intrinsix SD-DAC-CEC are:

    Perfect for applications that require low cost data converter technology, such as:

• High Volume Consumer (Toys, MP3 Players, Cell Phones, etc)

• Industrial/Retail (Motion Controls, POS Devices, etc)

    Silicon proven architectures can be incorporated in a variety of  CMOS-based silicontechnologies such as:

• TSMC, SMIC, UMC, etc

• .250μm and .180μm

    Available in 16, 18 and 20-bit resolutions

    Available in 3rd, 4th and 5th Order  SD Modulation Complexity (others available upon request)

    Able to achieve a Signal-to-Noise Ratio (SNR) of 115db

    Optimized for cost

    Very low in power consumption with a customizable Low Power Mode

    Tunable for each application

    Available as RTL and GDSII as well as RTL and Behavioral System models

        in industry standard formats such as Verilog-A or Simulink