MCP4725 < Embedded_Systems

Tags: view all tags

---+ The MCP4725 Digital to Analogue converter

Often we need analogue signal levels or synthetically produced (program controlled) signals to drive external devices. The <b>D</b>igital to<b> A</b>nalogue <b>C</b>onverter (DAC) is a device that accepts a digital value and converts it to an analogue signal level and the [[https://cdn-shop.adafruit.com/datasheets/mcp4725.pdf][ MCP4725]] is such a device accepting a 12 bit digital data word and converting it to a signal level between 0V and Vcc.

This is how it physically looks like:
| <img alt="dac_front.png" height="370" src="%ATTACHURL%/dac_front.png" title="dac_front.png" width="347" /> | <img alt="dac_back.png" height="366" src="%ATTACHURL%/dac_back.png" title="dac_back.png" width="372" /> |
Since this device has an I2C interface it is easily programmable from the Raspberry Pi. In addition there is a nice description [[https://cdn-learn.adafruit.com/downloads/pdf/mcp4725-12-bit-dac-with-raspberry-pi.pdf][on how to use it on the Raspberry Pi]]. Since they use Python for their code we will have to convert their Python code into C.

-- %USERSIG{UliRaich - 2017-09-27}%

---++ Comments

%COMMENT%

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
png	dac_back.png	r1	manage	953.2 K	2017-09-27 - 08:24	UnknownUser
png	dac_front.png	r1	manage	1097.6 K	2017-09-27 - 08:24	UnknownUser

Topic revision: r1 - 2017-09-27 - uli