i2c dac adc voltage levels

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aj.likes.dexter

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I would like to know if the pcf 8591 adc/dac can accept and output -5 to 5V if i simply set the Vcc&Vref to +5V and Vss and AGND to -5V? the data sheet does not mention if Vss and Agnd can be below circuit zero.

Which commonly available ADC/DAC have this ability (- to + Volt)?
 
I don't think any commonly available ones do? - you simply scale/shift the signal to be uni-polar.
 
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I wanted to minimize wiring with all the shifting and scaling.
moreover pcf 8591 doesn't seem to be available in any nearby stores
thanks.
 
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