Microchip Technology Inc

MCP6SX2 PGA Thermistor PICtail Demo Board

Part Number: MCP6SX2DM-PCTLTH

The MCP6SX2 PGA Thermistor PICtail Demo Board features the MCP6S22 and MCP6S92 Programmable Gain Amplifiers (PGA). These devices help:

  • Overcome the non-linear response of the on-board NTC thermistor
  • Provide multiplexing between two inputs; the other input can be any desired source. This opens the possibilities of temperature correcting another sensor, and of increasing the number of PIC® microcontroller I/O pins available for other purposes.

Two on-board variable resistors allow users to experiment with different designs on the bench. DIP switches on the board select certain resistors (in a binary weighted sequence) to add together, thereby emulating the series resistor in the voltage divider and the thermistor’s change in resistance over temperature.


A complete solution is achieved by interfacing this board to the PICkit™ 1 Flash Starter Kit (see DS40051) and the Signal Analysis PICtail™ Daughter Board (see DS51476). The solution provides:

  • PC software interface
  • PICmicro microcontroller
  • Firmware programmability
  • 10-bit ADC (on the microcontroller)
  • Firmware (with re-locatable assembler code) for the microcontroller.

    On-Board Thermistor

    • Can select a high accuracy NTC thermistor
    • Can select an emulator for quick bench work
    Voltage Divider

    • Linearizes thermistor’s response
    • Series resistor has an emulator for quick prototyping of different designs

    PGA

    • Buffers the NTC Thermistor
    • Increases linearity and temperature resolution
    • Provides an additional input

     

    SMD Test Points

    The MCP6SX2 PGA Thermistor PICtail Demo Board features the MCP6S22 and MCP6S92 Programmable Gain Amplifiers (PGA). These devices help:

    • Overcome the non-linear response of the on-board NTC thermistor
    • Provide multiplexing between two inputs; the other input can be any desired source. This opens the possibilities of temperature correcting another sensor, and of increasing the number of PIC® microcontroller I/O pins available for other purposes.

    Two on-board variable resistors allow users to experiment with different designs on the bench. DIP switches on the board select certain resistors (in a binary weighted sequence) to add together, thereby emulating the series resistor in the voltage divider and the thermistor’s change in resistance over temperature.


    A complete solution is achieved by interfacing this board to the PICkit™ 1 Flash Starter Kit (see DS40051) and the Signal Analysis PICtail™ Daughter Board (see DS51476). The solution provides:

    • PC software interface
    • PICmicro microcontroller
    • Firmware programmability
    • 10-bit ADC (on the microcontroller)
    • Firmware (with re-locatable assembler code) for the microcontroller.
  • PICkit™1 Flash Starter Kit
  • Signal Analysis PICtail Daughter Board