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'Looking for a good quality I2C DAC'
1995\09\08@072636 by divanov

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> 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, there is a whole range by MAXIM, but unfortunately it's only
SPI/QSPI/Microwire compatible. Maybe that will also do for your
purposes. It's also a serial protocol.
Here we go:

MAX504   10bit   SPI   serial version of 503
MAX515   10bit   SPI   ultra low power
MAX531   12bit   SPI   serial version on 530
MAX538   12bit   SPI   8pin ultra low power
MAX539   12bit   SPI   same, just 0-5V output
MAX543   12bit   SPI   multiplying
MAX7543  12bit   SPI   multiplying

Cheers,

Richard

1995\09\09@083556 by DEZA ASENSIO, Roberto

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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               |spam_OUTrdezaTakeThisOuTspampopmail.cti.unav.es
Universidad de Navarra             |.....rdezaKILLspamspam@spam@cun.unav.es
Centro de Proceso de Datos         |rdaspamKILLspamcpd.unav.es

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