Chip sets in sigma 350 family

From the discussions in this forum, I got the below details.

"The Sigma300 is the ADAU1452/51/50 parts and the Sigma 350 is the ADAU1462/63/66/67 parts."

By referring analog website, ADAU1462/63/66/67 parts also supports only 300MHz core frequency. From the name we suggest Sigma 350 parts should support 350MHz core frequency.

Please confirm the 'Sigma 350' family supports for 300MHz only. Can't we judge the core frequency based on the part name?

Regards,

Kalaiselvi.S

Parents
  •      Hello,

         The "Sigma xxx" is a model number so it doesn't necessarily refer to the core rate.  Rather it identifies a "family" of parts which share some common features, similar internal architecture, as well as the compiler which SigmaStudio brings in to crunch your schematic into instruction code.  The Sigma100 chips include the ADAU1701, which runs at just under 50 MHz.  These chips cannot branch so unused instructions are NOPs.  They have a simple code structure such that a microcontroller can boot them with just a few block writes.  The Sigma200 chips (ADAU144x) introduced branching and some code optimization, with a 172 MHz core rate.  The Sigma300 (ADAU145x) brings 300 MHz with SIMD architecture which, for example, drastically reduces the instruction count of high-order filters. They also feature a wider (8.24) data path and block processing capability.  Sigma350 has the same core as the Sigma300 -- it's even instruction code compatible.  It adds features such as more delay memory.  Which to use often depends both on MIPS rate and features like self-boot, GPIOs, SRCs, built-in converters, power usage, etc.

         Best regards,

         Bob

  • Thanks for the details, Bob.

     Actually, where we can get this details of which series of chips, belongs to which 'Sigma xxx' model. Other than in this forum (Engineer zone). We have verified in analog website in the below link.Here it is mentioned as ADAU1462 & 1463  as ''ADAU1462/1463-300''. Hence we thought ADAU146x series also belongs to Sigma300. Please clarify.

    https://www.analog.com/en/parametricsearch/11310

    Regards,

    Kalaiselvi

  • ADAU145x = Sigma300
    ADAU146x = Sigma350

    Like Bob said, they're very closely related and can mostly be viewed as the same family. The designation is not related to clock speed (the fact that the Sigma300 processors ran at up to 300 MHz is just coincidence).

    The following parts are 150 MHz:
    ADAU1450
    ADAU1462-150
    ADAU1463-150

    The following parts are 300 MHz:
    ADAU1451
    ADAU1452
    ADAU1462-300
    ADAU1463-300
    ADAU1466
    ADAU1467

Reply
  • ADAU145x = Sigma300
    ADAU146x = Sigma350

    Like Bob said, they're very closely related and can mostly be viewed as the same family. The designation is not related to clock speed (the fact that the Sigma300 processors ran at up to 300 MHz is just coincidence).

    The following parts are 150 MHz:
    ADAU1450
    ADAU1462-150
    ADAU1463-150

    The following parts are 300 MHz:
    ADAU1451
    ADAU1452
    ADAU1462-300
    ADAU1463-300
    ADAU1466
    ADAU1467

Children
  • Thanks for the details.

    Regards,

    Kalaiselvi

  • Hello All,

    For a peek from the inside of the company... Since the 146x parts did not have a change in the core architecture or the core rates, we could not call it the next generation of Sigma, the Sigma400, But there were some significant additions to the peripherals around the core so we thought of it as a half of a generation change and so the Sigma350 was born! It is half way to a Sigma400. 

    They were designed to be backwards compatible and for the most part they are. I often run code for either processors on either eval board and as long as you do not try to use something that the hardware does not have it works. 

    Dave T