Product description
Eight channel 8-bit A/D converter with an I2C interface (Qwiic). Based on the ADC converter ADS7830 from Texas Instruments, which is a simple SAR (Succesive Approximation Register) converter. Up to 70Khz sampling rate provides good temporal resolution and 8 bits is good enough for many analog sensors, voltage measurement, or for reading potentiometers and other user interfaces.
Suitable for expanding the number of analog inputs for microcontrollers like Adafruit, or for single board computers like Raspberry Pi, which lack ADC.
Qwiic connectors provide smooth, solder-free connection of voltage and I2C with a cable. Two Qwiic connectors mean it can easily be connected in series with other Qwiic boards. Voltage and I2C are provided on a connector with 2.54 mm pin spacing for use with breadboards and prototyping. A pin header for this is included (not mounted).
Two address pins to jumper allows you to choose between four different addresses, and thus easily connect four converters in series and get 32 analog inputs. The inputs can also be used in differential pairs, for better interference immunity.
Compatible with Raspberry Pi and Arduino. Code examples, documentation and libraries are available at Adafruit.
Specifications:
- Resolution: 8 bits
- Sampling rate (max): 70ksps
- Number of channels: 8
- Interface: I2C
- Architecture: SAR
- Inputs: single-ended or differential
- Selectable between external and internal voltage reference
- Supply voltage: 2.7-5V
- Working temperature: -40 to +85°C
- SNR (dB): 50
- Dimensions: 30.5 x 17.7 x 4.7 mm
- Weight 2.1g