yup but that is much smaller and harder to hand solder than SOIC-8. i am expecting that someone used to DIP will not like that jump ;-)

 

m

Are we forgetting that the TS is trying to produce a DAC?

Sort of. Using an ADC.

BTW, Microchip has a dsPIC in through-hole packaging that has two 16-bit DACs.

 

i like that, it would need to be EP variant such as PC33EP32GP502ISP and it is very nicely priced.

 

0.1% is equivalent to 10-bit (1/1024=~ 0.1%)
that is a far cry from 16-bit.

what is the application?

sorry, bad math. aiming for .001 volt resolution across 4 or 5 volt range.

 

Here's what I'm getting from everything I've read:
- Filtered PWM is the best version of all the contraptions I'm imagining
- There are some DAC ICs that I should check out

(Also, yes - I'm fine with serial or parallel DAC input)

I do want to use through hole components because I'm trying to create a product that is easy to repair. I'm sticking with mainly CMOS logic. I am open to surface mount components with decently large pin pitch.

Now I'm interested in high frequency PWM via a dedicated chip with it's own oscillator so as not to overburden my microprocessor. Maybe something with a serial input and latch. What kind of part is this? A class D amp?

 

I find 1.27mm pitch surface mount much easier to repair than through hole, especially plated through holes. Far too difficult to desolder compared to heating it with hot air and lifting it off.
0.635mm pitch is about on a par.
0.5mm pitch and I would prefer struggling with getting pins out of throughplated holes

 

I find 1.27mm pitch surface mount much easier to repair than through hole, especially plated through holes. Far too difficult to desolder compared to heating it with hot air and lifting it off.
0.635mm pitch is about on a par.
0.5mm pitch and I would prefer struggling with getting pins out of throughplated holes

This is really good to know - but I plan to use IC sockets.

 

i like that, it would need to be EP variant such as PC33EP32GP502ISP and it is very nicely priced.

What's your goto marketplace for finding dsPics? I looked that one up by model number and I'm not seeing the DAC on the datasheet but now I really want to find one. A microcontroller like that would be 100% ideal for my use case.

 

i checked Mouser.ca since I am in Canada. it is one of major electronics distributors i commonly use (along with DigiKey, Newark, Futurlec etc.).
for searching across multiple suppliers (check stock, compare prices) i use crawler Octopart.com but this is not the only one.
you can ask google or whatever search engine you use to list alternatives (https://www.findchips.com/ etc)
there are more in the other parts of world like https://www.unikeyic.com/

 

Found this on Microchip's site:
DSPIC33FJ64GP802-I/SP
https://www.microchip.com/en-us/product/dsPIC33FJ64GP802#product-purchase
it's available in spdip!

 

Found this on Microchip's site:
DSPIC33FJ64GP802-I/SP
https://www.microchip.com/en-us/product/dsPIC33FJ64GP802#product-purchase
it's available in spdip!

That’s the one.

The next question is where is the data coming from?

 

That’s the one.

The next question is where is the data coming from?

Well, it's a Eurorack format control voltage sequencer for audio synthesis use. It will have 8 rotary encoders (quadrature) and a series of momentary switches connected via interrupt-capable IO expanders. It will also have a TFT screen that has a built-in SD card slot for storage.

In short, from dsPIC's RAM. It will likely be floats but I will end up optimizing it for the architecture of the dsPIC, so it could be integers. There will be some basic signal processing applied to the values.

Edit: The DAC need to output sharp transitions but the actual sampling rate can be variable.

 

What's everyone using for PIC programming? Is there a place I can go to find compatibility with various PIC ICs? I assume I'll be using MPLAB. I'm a hobbyist C++ programmer so I think I'll be fine on the software side.

Just wanted to say again - this community has been so freakin helpful. Thank you!

 

Microchip, TI, ST etc are all awesome... you should also be able to get free samples.

 

Microchip, TI, ST etc are all awesome... you should also be able to get free samples.

I tried! Apparently my account is either too fresh or I'm not cool enough for free samples. I'll probably just get it via Digikey when I next have that sweet sweet project cash.

 

to qualify for sample programs one usually must register using "official" email like school or work - not the web mails like Gmail, hotmail, Yahoo mail.

 

to qualify for sample programs one usually must register using "official" email like school or work - not the web mails like Gmail, hotmail, Yahoo mail.

That makes sense! Might have a family member I know help me with that.

 

What's everyone using for PIC programming? Is there a place I can go to find compatibility with various PIC ICs? I assume I'll be using MPLAB. I'm a hobbyist C++ programmer so I think I'll be fine on the software side.

Just wanted to say again - this community has been so freakin helpful. Thank you!

MPLAB the free version of their C compiler.

 

MPLAB the free version of their C compiler.

MPLabX is the IDE. XC8 is the compiler.

Edit: XC8, XC16, XC32, XC-DSC

 

MPLabX is the IDE. XC8 is the compiler.

Edit: XC8, XC16, XC32, XC-DSC

I imagine I'll be using MPLabX with XC16. I like cross-platform software.