Negative Voltage from DAC0808

[theone_in_themoon]

10 pin dac0808 diagram

Hullo
I am using DAC0808 LCN to produce audio by playing WAV files. I am unable to generate negative voltage from it. Is there any way in which i can do it or will i have to use op-amps as adders etc. to get negative voltages ???

Refering to the statement in the start of Page:10 of datasheet of DAC0808, where it states:

"Bipolar input signals may be handled by connecting
R14 to a positive reference voltage equal to the peak
positive input level at pin 15."

This statement appers quite vague to me but I think there must be way to generate negative voltage by considering the input byte as a signed one (MSB for sign and rest for data).

Please help me with any diagram or a more clear statement about how to achive this goal.

Thankyou in advance,

Regards

 

[IanP]

dac0808+wav

You can try to remove dc component from the DAC output by adding a capacitor in series with the output. What you generate is an audio signal so after capacitor you will have a +/- signal ..