Hi Brendan,

I kinda assumed that your circuit already had a PIC in it since you
posted on the piclist and didn't say otherwise :) For that reason I
was suggesting that maybe you could do what you wanted without any
additional parts - just use the PIC's internal ADC.

I just looked at the MAX1363. I see that it can monitor voltages as
you need, but I don't know what you ultimately need to interface to.
Assuming that a microcontroller is going to look at the outputs of the
MAX1363, then I think that the 1363 is redundant and the micro could
probably do it itself.

Sean


On Mon, Aug 11, 2008 at 1:34 PM, Brendan Moran <annirack@shaw.ca> wrote:
>
>>What about the ADC then?
>
>>
>>Sean
>
> Hi Sean,
>
>
> Did you take a look at the MAX1363? It has 4 inputs. It has a monitor
> mode where it runs independent of the microcontroller, and compares
> against two threshold values for each input, with an alert output when
> it compares against one of its threshold values.  It consumes 500uA in monitor mode at 133ksps,
> which is the same as the accelerometer power consumption.
>
>
> So it essentially does all I've asked for.  There are only two things I don't like about it:  it isn't stocked anywhere other than avnet, who want to sell it in multiples of 2500 (at $7.50ea :O ), and the MCU I have spec'd in
> doesn't operate in I2C high-speed mode, so the best I can get is
> 400kbps, while the MAX1363 supports 3.4MBps.
>
> Cheers,
> Brendan
>
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