Peter wrote:
> I am looking for an AD Converter with I2C output.
> Does someone know such a device ??

It's always worth looking at the Philips I2C Peripherals Handbook first.

They offer:
PCF 8591 4-ch 8-bit A/D + D/A O/P
Other handy things:
PCF 8583 Clock-Calendar with 256 bytes of Static RAM (with battery
backup).
         (this chip can be programmed to give a wake-up interrupt
pulse).
Universal LCD driver (digits)
LCD row and coloumn drivers (matrix)
4-digit LED driver
8-bit I/O expander
etc etc.

And of course all these can be strung together on the I2C bus, just
using 2 pins.

John Blackburn,
South London UK.