Adafruit PCF8591 Quad 8-bit ADC + 8-bit DAC - STEMMA QT / Qwiic
The Adafruit PCF8591 Quad 8-bit ADC + 8-bit DAC combines four analogue input channels and one analogue output channel in a single I2C breakout. Measure voltages from potentiometers, sensors, or other analogue sources — and generate analogue output signals — all over a simple two-wire connection.
With 8-bit resolution, the PCF8591 is ideal for basic analogue measurement and signal generation tasks where high precision isn't critical. Three I2C address jumpers let you chain up to 8 breakouts on a single bus for 32 ADC channels and 8 DAC channels. STEMMA QT connectors make wiring solderless and simple.
Key Features
- 4× 8-bit ADC Channels – Measure up to four analogue voltages simultaneously
- 1× 8-bit DAC Channel – Generate analogue output voltages
- I2C Interface – Simple two-wire connection, works with any I2C-capable board
- 3 Address Jumpers – Up to 8 breakouts on one bus (32 ADC + 8 DAC channels)
- STEMMA QT / Qwiic – Solderless STEMMA QT connectors for easy daisy-chaining
- Breadboard Friendly – Standard 0.1″ header pinout with SO16 chip mounted on breakout PCB
Ideal For
- Adding analogue inputs to boards without ADC (e.g. Raspberry Pi)
- Reading potentiometers, light sensors, or other analogue sensors over I2C
- Generating analogue control voltages for circuits or peripherals
- Multi-board setups needing many analogue channels on a budget
Resources
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Adafruit PCF8591 Quad 8-bit ADC + 8-bit DAC combines four analogue input channels and one analogue output channel in a single I2C breakout. Measure voltages from potentiometers, sensors, or other analogue sources — and generate analogue output signals — all over a simple two-wire connection.
With 8-bit resolution, the PCF8591 is ideal for basic analogue measurement and signal generation tasks where high precision isn't critical. Three I2C address jumpers let you chain up to 8 breakouts on a single bus for 32 ADC channels and 8 DAC channels. STEMMA QT connectors make wiring solderless and simple.
Key Features
- 4× 8-bit ADC Channels – Measure up to four analogue voltages simultaneously
- 1× 8-bit DAC Channel – Generate analogue output voltages
- I2C Interface – Simple two-wire connection, works with any I2C-capable board
- 3 Address Jumpers – Up to 8 breakouts on one bus (32 ADC + 8 DAC channels)
- STEMMA QT / Qwiic – Solderless STEMMA QT connectors for easy daisy-chaining
- Breadboard Friendly – Standard 0.1″ header pinout with SO16 chip mounted on breakout PCB
Ideal For
- Adding analogue inputs to boards without ADC (e.g. Raspberry Pi)
- Reading potentiometers, light sensors, or other analogue sensors over I2C
- Generating analogue control voltages for circuits or peripherals
- Multi-board setups needing many analogue channels on a budget
