12 or 14 bit ADC ?

[Matthias Melcher]

I am looking for a relatively cheap 12 or 14 bit analog-to-digital
converter that I can use to read the output of three rat gyros at about
100 to 200 samples per second.

I would prefer a one chip solution to read all three of them, but low
price is the major issue (sadly...). I will read the chip using a PIC,
so any interface is fine, but SDI or I2C would waste the least amount of
pins ;-)

Any suggestions and shared experiences are greatly appreciated.

Matthias

 

[Spehro Pefhany]

On Sun, 31 Jul 2005 11:21:34 +0200, the renowned Matthias Melcher
<mm@matthiasm.com> wrote:

I am looking for a relatively cheap 12 or 14 bit analog-to-digital
converter that I can use to read the output of three rat gyros at about
100 to 200 samples per second.

I hope that you mean "rate gyros". ;-)

I would prefer a one chip solution to read all three of them, but low
price is the major issue (sadly...). I will read the chip using a PIC,
so any interface is fine, but SDI or I2C would waste the least amount of
pins ;-)

Any suggestions and shared experiences are greatly appreciated.

Matthias

Why don't you use a dsPIC with 12-bit ADC on-board?


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[Matthias Melcher]

Spehro Pefhany wrote:

On Sun, 31 Jul 2005 11:21:34 +0200, the renowned Matthias Melcher
mm@matthiasm.com> wrote:

... three rat gyros at about

I hope that you mean "rate gyros". ;-)

Ooops ;-)

Good suggestion with the Pic. I will check that out.

 

[Matthias Melcher]

Spehro Pefhany wrote:

On Sun, 31 Jul 2005 11:21:34 +0200, the renowned Matthias Melcher
mm@matthiasm.com> wrote:

... three rat gyros at about

I hope that you mean "rate gyros". ;-)

Ooops ;-)

Good suggestion with the Pic. I will check that out.

 

[Don Baker]

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2018&mcparam=en022329
are under $6 in production quantity. I look at the 48 k flash version and
the features include on board I2C, onboard flash and micro9chiups software
support is really good even with small quantities are involved.
Don


"Matthias Melcher" <mm@matthiasm.com> wrote in message
news:dci564$85n$05$1@news.t-online.com...

I am looking for a relatively cheap 12 or 14 bit analog-to-digital
converter that I can use to read the output of three rat gyros at about
100 to 200 samples per second.

I would prefer a one chip solution to read all three of them, but low
price is the major issue (sadly...). I will read the chip using a PIC,
so any interface is fine, but SDI or I2C would waste the least amount of
pins ;-)

Any suggestions and shared experiences are greatly appreciated.

Matthias

 

[Matthias Melcher]

Don Baker wrote:

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2018&mcparam=en022329
are under $6 in production quantity. I look at the 48 k flash version and
the features include on board I2C, onboard flash and micro9chiups software
support is really good even with small quantities are involved.
Don

Very cool. Somehow I totally misinterpreted the 'ds' by confusing it
with DSP. This is a great solution, looking at all the variation of this
technology. I already found some chips I really like, plus I do have the
whole PIC environment set up anyways.

Thanks, guys, for "redirecting" me back to PICs instead of going the
external component route!