Shop OBEX P1 Docs P2 Docs Learn Events
Adding additional analog and digital I/O — Parallax Forums

Adding additional analog and digital I/O

Comments

  • tonyp12tonyp12 Posts: 1,951
    If you're up for the task of programming, some of it is just point and drag in to a schematic, some stuff is in C.
    PSoC® Analog Coprocessor CY8C4Axx, 28pin ssop as low as $1.45
    First available soon at Mouser is the $4.50 (48pad qfn) CY8C4A45LQI-483 $2.82 @1K

    Analog Front End (AFE)
    •4 x Opamps
    •6 x Comparators
    •1 x Programmable Analog Filter
    •38-channel Analog Multiplexer

    Analog-to-Digital Converters
    •1 x 14-bit Delta-Sigma ADC*
    •1 x 12-bit SAR ADC
    •1 x 10-bit Single-Slope ADC

    Digital-to-Analog Converters
    •1 x 13-bit Voltage DAC
    •2 x 7-bit Current DAC
  • kwinnkwinn Posts: 8,697
    George Sutton wrote: »
    This offering from Maxim may be useful if you need to increase the pin count for I/O for a microcontroller project:

    https://www.maximintegrated.com/en/products/analog/data-converters/analog-to-digital-converters/MAX11311.html/tb_tab0

    Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX11311.pdf

    That's an impressive chip for mixed analog/digital I/O. Thanks for sharing the info.
  • kwinnkwinn Posts: 8,697
    tonyp12 wrote: »
    If you're up for the task of programming, some of it is just point and drag in to a schematic, some stuff is in C.
    PSoC® Analog Coprocessor CY8C4Axx, 28pin ssop as low as $1.45
    First available soon at Mouser is the $4.50 (48pad qfn) CY8C4A45LQI-483 $2.82 @1K

    Analog Front End (AFE)
    •4 x Opamps
    •6 x Comparators
    •1 x Programmable Analog Filter
    •38-channel Analog Multiplexer

    Analog-to-Digital Converters
    •1 x 14-bit Delta-Sigma ADC*
    •1 x 12-bit SAR ADC
    •1 x 10-bit Single-Slope ADC

    Digital-to-Analog Converters
    •1 x 13-bit Voltage DAC
    •2 x 7-bit Current DAC

    Also impressive, but as you say "If you're up for the task of programming". The most expensive one is on order while the MAX11311 is in stock.
  • DavidZemonDavidZemon Posts: 2,973
    Let me know if anyone has an interest in using this as a PropWare object. Seems like it'd be a great addition to PropWare's arsenal, so I'd be happy to add it if someone has a need.
  • scandoslavscandoslav Posts: 11
    DavidZemon wrote: »
    Let me know if anyone has an interest in using this as a PropWare object. Seems like it'd be a great addition to PropWare's arsenal, so I'd be happy to add it if someone has a need.

    I'm interested! It'd help simplify my current project tremendously. :)
  • jmgjmg Posts: 15,173
    DavidZemon wrote: »
    Let me know if anyone has an interest in using this as a PropWare object. Seems like it'd be a great addition to PropWare's arsenal, so I'd be happy to add it if someone has a need.

    One attraction of the MAX11311 is it delivers higher voltage IO, and any mix Analog/Digital.
    Not cheap, but very flexible.

    Another device that could make a useful object for Isolated Digital In, is the new Si838x series

    http://www.silabs.com/products/power/isolators/Pages/si838x-isolators.aspx

    Parallel ones need nothing special, but there is a SPI variant, that can cascade to 128 isolated in.
    Again, not cheap, but competes with many opto couplers
Sign In or Register to comment.