Try an MCp3422 we have use on 2 projects as shunt amplifiers slow but very
accurate...

Steve

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of
Marc Nicholas
Sent: 08 October 2013 19:14
To: Microcontroller discussion list - Public.
Subject: [EE} MCP3221

Howdy.

I'm in the market for an ADC.=20

- Definitely want I2C as the device already has several devices on the 'bus=
'
and we have good, stable I2C code (this is an ARM device)
- 12-bits (or at least 10 'real' bits) would be preferred
- Power consumption well below 1mA when converting
- A standby/shutdown mode that has virtually no quiescent current
- Small (< 10 mm^2 is preferable)
- Around a buck in quantity 250
- Neither sampling latency (I2C sees to that) or maximum samples per second
are terribly important -- 1Hz updates would be just fine

The MCP3221 scores well (I2C, comes in a variety of addresses, is
12-bit(-ish), <250uA current, <1uA standby, SOT23-5, ~$1.40). And I've had
decent luck with the cost-features-reliability trifecta with Microchip in
the past.

>From a search of my mailbox, I see Mr. Axtell used to use these parts --
any comments?=20

Any other recommendations?

TIA.

-m


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