deusletum / Winterbloom_AD5689

CircuitPython driver for the Analog Devices AD5689 16-bit DAC

Winterbloom AD5689

This is a CircuitPython driver for the Analog Devices AD5689(R) 16-bit DAC

Installation

Install this library by copying winterbloom_ad5689.py to your device's lib folder.

Connecting your device to the AD5689

The AD5689 is connected over SPI. You should wire up the devices as follows (TSSOP-16 package):

• 1: AD5689 = Vref, AD5689R = NC (uses internal reference)
• 2: NC
• 3: Analog output A
• 4: GND
• 5: VDD
• 6: NC
• 7: Analog output B
• 8: NC (optionally can use as serial out for daisy chaining)
• 9: GND (optionally can use as LDAC switch, but the driver doesn't use it)
• 10: GND (optionally can use as GAIN)
• 11: VDD (logic voltage)
• 12: SCLK - connect to board.SCK for hardware SPI or any digital pin for bitbang IO.
• 13: CS - connect to any digital pin.
• 14: MOSI - connect to board.MOSI for hardware SPI or any digital pin for bitbang IO.
• 15: VDD (optionally can use as hardware reset pin, but the driver doesn't use it)
• 16: GND (optionally can use as reset selection)

Example usage

import board
import winterbloom_ad5689

# Using hardware SPI with D3 wired to CS.
dac = winterbloom_ad5689.create_from_pins(
    cs=board.D3)
dac.reset()

# 16-bit values, so 0-65535
dac.a.value = 15000
dac.b.value = 0

License and contributing

This is available under the MIT License. I welcome contributors, please read the Code of Conduct first. :)