Target volume is 10,000 per year for this product.
COULD be much more.
The A2D is only small part.

Materials costs are around -
LM324      $US0.16
Resistors    $US0.01
Capacitors  $US0.04 to $US0.20 depending
Board area, insertion, testing etc add cost - still much much much
less than any alternative I have (yet) found.

RM



-----Original Message-----
From: Wagner Lipnharski <wagnerl@EARTHLINK.NET>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Thursday, July 15, 1999 11:06 AM
Subject: Re: Sigma Delta Converter


>Linear Technologies said about $14.
>LM324 + Zener + 9 resistors + 3 capacitors would take you close to
$4 to
>$6, considering that the LTC2400 is 24 bits ADC, your cost is
totally
>proporcional to dollars per bits of resolution.
>Remember that LTC2400 is quite new, less than 6 months old, some
>distributors don't have it available yet since it is not consumed in
>billions, but because its easy operation I believe it would has a
nice
>place into the marketshare of ADC's.
>Wagner.
>
>Russell McMahon wrote:
>>
>> Yes, LTC2400 is  a very nice product indeed but not suitable for
my
>> application due to the need for ultimate low cost. The processor
is
>> set due to other considerations and I must live withing its
>> constraints while costing approx nothing at all. What I have
achieved
>> (see separate post) will do what I want (9 or 10 bits accuracy - 8
>> probably OK) using an LM324, 9 resistors (including an amplifier
and
>> "reference", zener and 3 capacitors. Assembly costs and board
space
>> costs all add up but still far below LTC2400 cost I imagine - I
>> couldn't find a price at Digikey, Pioneer or Netbuy. How much are
you
>> buying them for?
>>
>> RM
>