Alternate MAX ADC DAC parts?

D

DaveC

Guest
Hello.. I've completed a prototype of a guitar effects box. After some
refinements I hope to sell a couple of them. But the realities of my
parts selection is only now hitting home, and I was wondering if any one
could suggest cheaper alternatives.

$51.00 each - MAX195 serial 16bit ADC, 85ksps (16pin DIP)
$41.00 each - MAX541 serial 16bit DAC in a (8pin DIP)

I don't have the money to buy in lots of 100+. I wish to keep rrp under
$150 so it seems the above two chips is almost a third of that. :(

The alternate parts dont need to be Maxim, but I do need 16bit & 40ksps+

Thanks.

DaveC

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On 18 Mar 2005 18:49:46 -0600, DaveC <bobason456@hotmail.com> wrote:

Hello.. I've completed a prototype of a guitar effects box. After some
refinements I hope to sell a couple of them. But the realities of my
parts selection is only now hitting home, and I was wondering if any one
could suggest cheaper alternatives.

$51.00 each - MAX195 serial 16bit ADC, 85ksps (16pin DIP)
$41.00 each - MAX541 serial 16bit DAC in a (8pin DIP)

I don't have the money to buy in lots of 100+. I wish to keep rrp under
$150 so it seems the above two chips is almost a third of that. :(

The alternate parts dont need to be Maxim, but I do need 16bit & 40ksps+

Thanks.

DaveC
Click to expand...

Dave,

Just check the usual suspects: TI/BB, Analog Devices, National. I'd
think that the pricing you quote is high by a factor of 5, roughly.

The old PCM56 audio dac and its clones are about $6.

John
 
On 18 Mar 2005 18:49:46 -0600, DaveC <bobason456@hotmail.com> wroth:

Hello.. I've completed a prototype of a guitar effects box. After some
refinements I hope to sell a couple of them. But the realities of my
parts selection is only now hitting home, and I was wondering if any one
could suggest cheaper alternatives.

$51.00 each - MAX195 serial 16bit ADC, 85ksps (16pin DIP)
$41.00 each - MAX541 serial 16bit DAC in a (8pin DIP)

I don't have the money to buy in lots of 100+. I wish to keep rrp under
$150 so it seems the above two chips is almost a third of that. :(

The alternate parts dont need to be Maxim, but I do need 16bit & 40ksps+

Thanks.

DaveC
Click to expand...
A 16 bit PWM output running at a clock rate of 640 KHz or better
followed by a good low-pass filter should get the job done. A PIC and a
handfull of analog parts would set you back 10 bucks or so.

Jim
 
The MAX195 is a great part, but not cheap. It also requires pluss and minus
power supplies, 2 caps on each rail for a total of 8 caps, an external
reference, and the space on a PCB for all that crap -- Jesus H Christ.

Check out Linear Technology. You might also go to Digikey, type ADC into
the search box and do a parmetric search to an ADC you can live with.

Jeff Stout



"DaveC" <bobason456@hotmail.com> wrote in message
news:Xns961E8BDA647DEohirohotmailcom@38.119.71.210...
Hello.. I've completed a prototype of a guitar effects box. After some
refinements I hope to sell a couple of them. But the realities of my
parts selection is only now hitting home, and I was wondering if any one
could suggest cheaper alternatives.

$51.00 each - MAX195 serial 16bit ADC, 85ksps (16pin DIP)
$41.00 each - MAX541 serial 16bit DAC in a (8pin DIP)

I don't have the money to buy in lots of 100+. I wish to keep rrp under
$150 so it seems the above two chips is almost a third of that. :(

The alternate parts dont need to be Maxim, but I do need 16bit & 40ksps+

Thanks.

DaveC

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Click to expand...
 
On 18 Mar 2005 18:49:46 -0600, in sci.electronics.design DaveC
<bobason456@hotmail.com> wrote:

Hello.. I've completed a prototype of a guitar effects box. After some
refinements I hope to sell a couple of them. But the realities of my
parts selection is only now hitting home, and I was wondering if any one
could suggest cheaper alternatives.

$51.00 each - MAX195 serial 16bit ADC, 85ksps (16pin DIP)
$41.00 each - MAX541 serial 16bit DAC in a (8pin DIP)

I don't have the money to buy in lots of 100+. I wish to keep rrp under
$150 so it seems the above two chips is almost a third of that. :(

The alternate parts dont need to be Maxim, but I do need 16bit & 40ksps+

Thanks.

DaveC

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checkout
Click to expand...
http://wavefrontsemi.com/
(really an alesis company/offshoot)
The AL1101 and AL1201 look pretty good, there are better products
around, but they are simple to use, you just need wordclock.

The bitclock etc are all synthesised internally.So do you mind the
extra resolution of 24bit? for about 5$


martin


Opinions are like assholes -- everyone has one
 
martin griffith <martingriffithX@Xyahoo.co.uk> wrote in
news:abpn3111pv00hdlbdbd4c7a5ge7i0eoler@4ax.com:

On 18 Mar 2005 18:49:46 -0600, in sci.electronics.design DaveC
bobason456@hotmail.com> wrote:

Hello.. I've completed a prototype of a guitar effects box. After some
refinements I hope to sell a couple of them. But the realities of my
parts selection is only now hitting home, and I was wondering if any
one could suggest cheaper alternatives.

$51.00 each - MAX195 serial 16bit ADC, 85ksps (16pin DIP)
$41.00 each - MAX541 serial 16bit DAC in a (8pin DIP)

I don't have the money to buy in lots of 100+. I wish to keep rrp
under $150 so it seems the above two chips is almost a third of that.
:(

The alternate parts dont need to be Maxim, but I do need 16bit &
40ksps+

Thanks.

DaveC

----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet
News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the
World! 120,000+ Newsgroups ----= East and West-Coast Server Farms -
Total Privacy via Encryption =----
checkout
http://wavefrontsemi.com/
(really an alesis company/offshoot)
The AL1101 and AL1201 look pretty good, there are better products
around, but they are simple to use, you just need wordclock.

The bitclock etc are all synthesised internally.So do you mind the
extra resolution of 24bit? for about 5$


martin


Opinions are like assholes -- everyone has one
Click to expand...
Well, 40-20KHz band width. My design directly connects the ADC to the
DAC, kind of a audio variable sample rate converter, so they need to be
matched on data format and digital interface. The user is provided with a
pot that controls the clk rate.

I got the MAX195 and MAX541 because they would sample me a few parts. I
need bipolar output on the DAC, but seeing as my design has an opamp at
each end I could just add a 2.5 volt offset either way so single 5volt
ADC DAC would be ok.

I was looking at some sample hold parts that would work given the above
description, but I used the vref on the MAX195 to provide distortion.

Do you know of any ADC DAC combo chips.?

DaveC

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On 18 Mar 2005 18:49:46 -0600, DaveC <bobason456@hotmail.com> wrote:

Hello.. I've completed a prototype of a guitar effects box. After some
refinements I hope to sell a couple of them. But the realities of my
parts selection is only now hitting home, and I was wondering if any one
could suggest cheaper alternatives.

$51.00 each - MAX195 serial 16bit ADC, 85ksps (16pin DIP)
$41.00 each - MAX541 serial 16bit DAC in a (8pin DIP)

I don't have the money to buy in lots of 100+. I wish to keep rrp under
$150 so it seems the above two chips is almost a third of that. :(

The alternate parts dont need to be Maxim, but I do need 16bit & 40ksps+

Thanks.

DaveC

----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
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Click to expand...
For DACs, ones designed for digital audio are MUCH cheaper - around $5 in even fairly low
quantities.
You may have to play around with the data format a little & send dummy data for one of the stereo
channels.
Look at Burr-Brown (TI) and AKM, although the latter may be hard to get in smaller volume.

http://www.asahi-kasei.co.jp/akm/en/product/audio.html

Digital audio oriented ADCs should also be cheaper.

You will almost certainly have to use SM packaging though.
 
On Sat, 19 Mar 2005 01:40:34 GMT, James Meyer <jmeyer@nowhere.net> wrote:

On 18 Mar 2005 18:49:46 -0600, DaveC <bobason456@hotmail.com> wroth:

Hello.. I've completed a prototype of a guitar effects box. After some
refinements I hope to sell a couple of them. But the realities of my
parts selection is only now hitting home, and I was wondering if any one
could suggest cheaper alternatives.

$51.00 each - MAX195 serial 16bit ADC, 85ksps (16pin DIP)
$41.00 each - MAX541 serial 16bit DAC in a (8pin DIP)

I don't have the money to buy in lots of 100+. I wish to keep rrp under
$150 so it seems the above two chips is almost a third of that. :(

The alternate parts dont need to be Maxim, but I do need 16bit & 40ksps+

Thanks.

DaveC


A 16 bit PWM output running at a clock rate of 640 KHz or better
followed by a good low-pass filter should get the job done. A PIC and a
handfull of analog parts would set you back 10 bucks or so.
Click to expand...
16 bits PWM 640Khz would imply a clock rate of 41GHz....!
 
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