ADCPi
€21,95 /€18,14 excl. VAT
1 in stock
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Description ADC Pi
The ADC Pi is an 8 channel 17 bit analog to digital converter designed to work with the Raspberry Pi† The ADC Pi is based on two Microchip MCP3424 A/D converters with 4 analog inputs each. The MCP3424 is a delta-sigma A/D converter with low-noise differential inputs.
The board can be used as a single-ended A/D converter. It uses the internal 2,048V reference voltage whose -V pins are connected to the Ground. A voltage divider on the ADC Pi board brings the input voltage range to a usable 0 - 5,06V† In this configuration, the sample size is 17 bits for each channel.
The ADC Pi is powered through the Raspberry Pi using the GPIO pins or via the built-in power connector† The extended GPIO pins allow you to stack the ADC Pi with other expansion cards.
The two MCP3424 A/D converters communicate via I2C with the Raspberry Pi† This allows you to use 8 analog inputs. A logic level converter is built into the ADC Pi board† This gives you a buffered 5V I2C port. Thanks to the I2C port you can easily add other I2C devices that work on 5V. The I2C buffer uses N-channel mosfets with a maximum drain current of 100mA.
The I2C address bits can be selected using the built-in jumpers. The MCP3424 supports up to 8 different I2C addresses. So with two A/D converters on each ADC Pi, you can run up to 4 ADC Pi cards on a single Raspberry Pi stack. This gives you 32 ADC inputs.
The MCP3424 includes a programmable gain amplifier. This provides the user with a selectable gain of x1, x2, x4 or x8 before the analog to digital conversion takes place.
The data rate for analog to digital conversions is 3,75 (17 bit), 15 (15 bit), 60 (13 bit) or 240 (11 bit) samples per second† Data rate and resolution can be configured within software using the I2C interface.
Features ADC Pi
- 8 x 17-bit 0 to 5V single-ended inputs
- Control via the Raspberry Pi I2C port
- Stack up to 4 ADC Pi cards on a single Raspberry Pi
- Jumper selectable I2C addresses
- Buffered 5V I2C Port
- Based on the MCP3424 from Microchip Technologies Inc
- Single Ended full-scale range of 5.0V
- We-board 2,048V reference voltage (accuracy ± 0,05%, drift: 15 ppm/°C)
- We-board programmable gain amplifier (PGA): 1, 2, 4 or 8 . gains
- Programmable data rate options:
- 3,75 SPS (17 bits)
- 15 SPS (15 bits)
- 60 SPS (13 bits)
- 240 SPS (11 bits) - One-time or continuous conversion options
- Mounting holes for use with the AB Electronics UK mounting kit (available separately)
- Soldering is required
- Suitable for eg Raspberry Pi 3, 4 and Zero boards
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