Merge pull request #214 from siddacious/mcp4728

Adding MCP4728

Author: kattni

.gitmodules

@@ -601,3 +601,6 @@
 [submodule "libraries/drivers/lsm6dsox"]
 	path = libraries/drivers/lsm6dsox
 	url = https://github.com/adafruit/Adafruit_CircuitPython_LSM6DSOX.git
+[submodule "libraries/drivers/mcp4728"]
+	path = libraries/drivers/mcp4728
+	url = https://www.github.com/adafruit/Adafruit_CircuitPython_MCP4728.git

docs/drivers.rst

@@ -376,6 +376,7 @@ These provide functionality similar to ``analogio``, ``digitalio``, ``pulseio``,
     MCP230xx GPIO Expander <https://circuitpython.readthedocs.io/projects/mcp230xx/en/latest/>
     MCP3xxx SPI ADC <https://circuitpython.readthedocs.io/projects/mcp3xxx/en/latest/>
     MCP4725 Digital-to-Analog Converter <https://circuitpython.readthedocs.io/projects/mcp4725/en/latest/>
+    MCP4728 4-Channel, 12-bit Digital-to-Analog Converter <https://circuitpython.readthedocs.io/projects/mcp4728/en/latest/>
     MPR121 Capacitive Touch Sensor <https://circuitpython.readthedocs.io/projects/mpr121/en/latest/>
     PCA9685 16 x 12-bit PWM Driver <https://circuitpython.readthedocs.io/projects/pca9685/en/latest/>
     TCA9548 I2C Multiplexer <https://circuitpython.readthedocs.io/projects/tca9548a/en/latest/>