Hi

>I need a DAC to controll a servo amp from a PIC. Sadly I don't have any more
>pins left. (it's an existing design.) I already have an I2C port implemented.
>I have tried to use a PCF8591 (Phillips 8 bit ADC / DAC) but it does'nt seem
>accurate enough. Can anyone point me in the direction of a different part?
>It MUST be I2C compatible.
>

Well, if a non-monochip way is accepted, you can use the Philips PCF 8574(A)
part, wich is a I/O port expansor I2C interfaced and connect your paralell DAC
of choice. Same can be done using a '73, programed to receive I2C request from
master PIC an output it to the DAC on *any* format.

Best regards:

>
--
Roberto Deza Asensio               |rdeza@popmail.cti.unav.es
Universidad de Navarra             |rdeza@cun.unav.es
Centro de Proceso de Datos         |rda@cpd.unav.es