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Thread: Analog output PICs

  1. 24th September 2008 09:02 AM #1
    Shohadawy
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    Default Analog output PICs

    Is there any version of the PIC series that has an integrated D/A converter ( Analog outputs ) ?
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  2. 24th September 2008 09:21 AM #2
    Nigel Goodwin
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    I've not seen any, but many have hardware PWM which can be used, followed by a low-pass filter (which a normal D2A requires anyway).

    Or you could use 8 pins to feed an R2R ladder, giving 8 bit resolution.
    PIC programmer software, and PIC Tutorials at:
    http://www.winpicprog.co.uk
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  3. 24th September 2008 12:17 PM #3
    Hero999
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    Both of those options will work but if the impedance of the load you're driving is low, you'll need a buffer.

    I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong.

    Please ask on the open forum if you have a question and I'll be happy to help,     if I know the answer.
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  4. 24th September 2008 12:20 PM #4
    Nigel Goodwin
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    Quote Originally Posted by Hero999 View Post
    Both of those options will work but if the impedance of the load you're driving is low, you'll need a buffer.
    The required filter can act as the buffer, it really needs to be an active one in any case - the same also applies to using an IC D2A as well.
    PIC programmer software, and PIC Tutorials at:
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  5. 24th September 2008 12:26 PM #5
    Hero999
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    The PIC also needs to be powered from a stable 5V supply.

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  6. 25th September 2008 03:38 AM #6
    Someone Electro
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    Cretan dsPIC33F have a built in stereo 16bit audio DAC.It even includes a buffer on the DAC.
    Il give you shocking experience.
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  7. 25th September 2008 05:03 AM #7
    dknguyen
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    Quote Originally Posted by Someone Electro View Post
    Cretan dsPIC33F have a built in stereo 16bit audio DAC.It even includes a buffer on the DAC.
    Really? That's the first I've heard of it.
    Tanaka Sensei (avatar) says: Please spell it "ridiculous" correctly! Not "rediculous". ^^
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  8. 25th September 2008 07:11 PM #8
    Hero999
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    It looks expensive.

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  9. 26th September 2008 02:53 PM #9
    BeeBop
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    Quote Originally Posted by Someone Electro View Post
    Cretan dsPIC33F have a built in stereo 16bit audio DAC.It even includes a buffer on the DAC.
    Microchip Technology Announces Six New DSCs with 16-bit Audio DAC
    http://www.microchip.com/stellent/id...param=en534586

    Quote Originally Posted by Hero999 View Post
    It looks expensive.
    Prices range from $3.67 to $4.18 each in 10,000-unit quantities.
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