{"product_id":"adc-differential-pi","title":"ADC Differential Pi","description":"\u003cp\u003eThe ADC Differential Pi is an 8 channel 18 bit analogue to digital converter designed to work with the Raspberry Pi.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSoldering required! This product comes unassembled and unsoldered.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt's based on two Microchip MCP3424 A\/D converters each containing 4 analogue inputs. The MCP3424 is a delta-sigma A\/D converter with low noise differential inputs.\u003c\/p\u003e\n\u003cp\u003eABelectronics designed the ADC Differential Pi as a companion for the ADC Pi. Unlike the ADC Pi the ADC Differential Pi does not include any voltage dividers so the inputs can be used to measure a differential voltage range of ±2.048V. This is useful for measuring inputs below ±2.048V or allows you to use your own voltage divider to measure higher voltages.\u003c\/p\u003e\n\u003cp\u003eThe ADC Differential Pi is powered through the host Raspberry Pi using the GPIO port and extended pins on the GPIO connector allow you to stack the ADC Differential Pi along with other expansion boards.\u003c\/p\u003e\n\u003cp\u003eThe two MCP3424 A\/D converters communicate via i2c to the host Raspberry Pi giving you eight analogue inputs to use. A logic level converter is included on the ADC Pi Plus board giving you a buffered 5V i2c port making it easy to add other I2C devices which operate at 5 volts without damaging the raspberry pi 3.3 volt i2c port. The i2c buffer uses N-channel mosfets with a maximum drain current of 100mA.\u003c\/p\u003e\n\u003cp\u003eThe I2C address bits are selectable using the on-board jumpers. The MCP3424 supports up to 8 different I2C addresses so with two A\/D converters on each ADC Differential Pi you can stack up to 4 ADC Differential Pi boards on a single Raspberry Pi giving you 32 ADC inputs.\u003c\/p\u003e\n\u003cp\u003eThe MCP3424 contains an on-board 2.048V reference voltage with an input range of ±2.048V differentially (full scale range of 4.096V\/PGA). A programmable Gain Amplifier gives the user a selectable gain of x1, x2, x4 or x8 before the analogue to digital conversion takes place.\u003c\/p\u003e\n\u003cp\u003eThe data rate for analogue to digital conversions is 3.75 (18 bit), 15 (16 bit), 60 (14 bit) or 240 (12 bit) samples per second. Data rate and resolution can be configured within software using the I2C interface.\u003c\/p\u003e\n\u003cp\u003eThere is an ADC Sample Rate Comparison which has more detailed sample information and test scripts to compare the different MCP2424 ADC chip bit and sample rates.\u003c\/p\u003e\n\u003cp\u003eUnused inputs should be tied to ground.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e8 x 18-bit differential inputs\u003c\/li\u003e\n\u003cli\u003eControl via the Raspberry Pi I2C port\u003c\/li\u003e\n\u003cli\u003eStack up to 4 ADC Differential Pi boards on a single Raspberry Pi\u003c\/li\u003e\n\u003cli\u003eJumper selectable I2C addresses\u003c\/li\u003e\n\u003cli\u003eBuffered 5V I2C port\u003c\/li\u003e\n\u003cli\u003eBased on the MCP3424 from Microchip Technologies Inc\u003c\/li\u003e\n\u003cli\u003eInput range of ±2.048V\u003c\/li\u003e\n\u003cli\u003eOn-board 2.048V reference voltage (Accuracy ± 0.05%, Drift: 15 ppm\/°C)\u003c\/li\u003e\n\u003cli\u003eOn-Board Programmable Gain Amplifier (PGA): Gains of 1, 2, 4 or 8\u003c\/li\u003e\n\u003cli\u003eProgrammable Data Rate Options:\n\u003cul\u003e\n\u003cli\u003e3.75 SPS (18 bits)\u003c\/li\u003e\n\u003cli\u003e15 SPS (16 bits)\u003c\/li\u003e\n\u003cli\u003e60 SPS (14 bits)\u003c\/li\u003e\n\u003cli\u003e240 SPS (12 bits)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eOne-Shot or Continuous Conversion Options\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABelectronics","offers":[{"title":"Default Title","offer_id":51616985186610,"sku":"ari1787257881788","price":15.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/0289\/8482\/files\/adc-differential-pi_1.jpg?v=1787257886","url":"https:\/\/www.mapleborough.shop\/products\/adc-differential-pi","provider":"My Store","version":"1.0","type":"link"}