This library has been made to easily interface and use the MCP4725 DAC with an Arduino or chipKit.
The MCP4725 is a low-power, high accuracy, single channel, 12-bit buffered voltage output Digital-to-Analog Convertor (DAC) with non-volatile memory (EEPROM). Its on-board precision output amplifier allows it to achieve rail-to-rail analog output swing.
The DAC input and configuration data can be programmed to the non-volatile memory (EEPROM) by the user using I2C interface command. The non-volatile memory feature enables the DAC device to hold the DAC input code during power-off time, and the DAC output is available immediately after power-up. This feature is very useful when the DAC device is used as a supporting device for other devices in the network.
The device includes a Power-On-Reset (POR) circuit to ensure reliable power-up and an on-board charge pump for the EEPROM programming voltage. The DAC reference is driven from VDD directly. In power-down mode, the output amplifier can be configured to present a low, medium, or high resistance output load.
The MCP4725 has an external A0 address pin. This A0 pin can be tied to VDD or VSS of the user’s application board.
Download:
MCP4725.zip (Filesize is 367.77 KiB. Downloaded 4151 times)
Some demos are included to demonstrate most of the functions. This is a multi-platform library that will work with several different development board types.
Nice to know:
This library will default to I2C Fast Mode (400 KHz) when using the hardware I2C interface.
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