enjoyneering / mcp4725

Arduino library for MCP4725 12-bit DAC with EEPROM

Microchip MCP4725

This is an Arduino library for I²C MCP4725 12-bit Digital-to-Analog Converter with EEPROM

• operating/reference voltage 2.7v - 5.5v
• output voltage from 0 to operating voltage
• maximum output current 25mA
• output impedance 1 Ohm
• maximum output load 1000pF/0.001μF in parallel with 5 kOhm
• voltage settling time 6 μsec - 10 μsec
• slew rate 0.55 V/μs
• add 100μF & 0.1 μF bypass capacitors within 4mm to Vdd
• device has 14-bit EEPROM with on-chip charge pump circuit for fail-safe writing
• estimated EEPROM endurance 1 million write cycles
• if Vdd < 2v all circuits & output disabled, when Vdd increases above Vpor device takes a reset state & upload data from EEPROM

Supports all MCP4725 features:

• Fast write
• Register read** & write
• EEPROM read** & write
• Power down
• General reset
• General wake-up

Tested on:

• Arduino AVR
• Arduino ESP8266
• Arduino ESP32
• Arduino STM32

** Library returns 65535 if there is a communication error on the I²C bus