Re: Simple multi-channel serial ADC (8-ch)?

Joerg wrote:

Hello Folks,

As an analog guy I get goose pimples when I see converters like the TLV1508. Impressive performance but, boy, do they need a complicated liturgy to get data out of them. Many of them must be told via SPI that I want to read this, that and the other value. Then you must patiently wait x clock cycles, wasting away bus time. The guy who designs the host processing will throw his coffee mug at me because there'll be a dozen of these.

Here is what I am looking for: 10 bits or so, 8 channels, bone-simple readout, can very very slow, low kHz range. All I need is to read DC values and it doesn't matter when the exact sampling time was. SPI, I2C, anything serial works. I mean, with a FIFO in there they should be able to do continuous autoscan and just dump the last valid set of values upon request.

Any ideas? I am also looking for 10-12 bit DAC with lots of channels but that seems to be much simpler.


Joerg,
I'd employ a controller such as the AVR Tiny26 with 8
differential or 11 single ended 10 bit channels.
Since you need a dozend of them just hook them together
with an SPI or an USI.
Linear Tech has a a bunch of multichannel DACs with the
LTC2600 : 8x 12 bits for 9$ as example.

Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
.

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