This stackable shield is designed to mount on the NodeMCU Wireless Development Board found HERE and provides 8 additional 12-bit ADC ports.

NOTE: This shield is not physically compatible with any other micro-controller, including Arduino boards.

This shield contains a Linear Technology LTC1863 12-Bit, 8-Channel, 200ksps ADC and a 2Kbit EEPROM. It can be configured for single-ended or differential voltage measurements on a per-channel basis. The on-board EEPROM can be used to store calibration and configuration information directly on the shield.

Specifications

ADC Specs:

• Datasheet
• 12-bit sample depth
• 200ksps Sample Rate
• 8-Channel Multiplexer
• Single-Ended or Differential Inputs
• Unipolar or Bipolar Conversion Modes
• SPI/MICROWIRE Serial I/O
• Signal-to-Noise Ratio: 89dB
• Single 5V Operation
• On-Chip Reference
• Low Power: 1.3mA at 200ksps, 0.76mA at 100ksps
• Sleep Mode
• Automatic Nap Mode Between Conversions

EEPROM Specs (24AA025E48):

• Datasheet
• Size: 2Kbits
• Pre-Programmed Globally Unique, 48-bit or 64-bit Node Address
• Read current 1 mA, maximum
• Standby current: 1 µA, maximum (I-Temp.) 5 µA, maximum (E-Temp.)
• 2-Wire Serial Interface, I2C Compatible
• Schmitt Trigger Inputs for Noise Suppression
• Output Slope Control to Eliminate Ground Bounce
• 100 kHz and 400 kHz Clock Compatibility
• Page Write Time 3 ms, typical
• Self-Timed Erase/Write Cycle
• 16-byte Page Write Buffer:
• ESD Protection >4,000V
• More than 1 Million Erase/Write Cycles
• Data Retention >200 Years

Board Features

• Onboard I2C EEPROM for storing configuration or calibration values
• I2C Address jumpers for EEPROM allows for 4 address choices
• Compatible with modified Arduino Libraries (linked below)
• SPI Interface to ADC with selectable CS line
• SPI CS Configuration jumper allows for flexible deployment
• Screw-terminal connections for ADC ports plus 2 ground terminals (COLOR MAY VARY)
• Stack-able headers to allow for stacking other shields on top
• Reset button for NodeMCU Dev Board

Documentation and Library

NOTE: This board ships with all headers un-soldered. Some light soldering is required to connect the headers and connectors. You can optionally elect to have the board shipped to you complete assembled for a nominal fee by selecting the option on the right.

All SMD components are pre-assembled, regardless of the options selected.

Dimensions

Outline: 51mm x 50mm ADC Port Spacing: 3.5mm