Microchip Digital Potentiometer

MCP402X Non-Volatile Digital Potentiometer Evaluation Board

The MCP402xEV is a low cost evaluation board that quickly enables the user to exercise all of the features of the MCP402X Non-Volatile Digital Potentiometer. This kit includes 2 PCBs, one populated & one unpopulated. The populated PCB has an MCP4021-103E/SN digital pot configured as a “windowed” potentiometer using a 2.5kΩ pull-up and a 2.5kΩ pull-down resistor. The PCB supports the 8 pin SOIC, SOT-23-6 and SOT-23-5 MCP402X package variations. A 6 pin PIC10F206-I/OT with FLASH memory is utilized to generate all of the Low-Voltage (LV) and High-Voltage (HV) MCP402X serial commands when the 2 momentary switches are depressed in various sequences. This enables the user to Increment and Decrement the wiper, save the setting to EEPROM & exercise the WiperLocktm feature. The PCB also supports the standard ICSP programming header used by the Microchip BFMP low cost programming tool.

• MCP4021/4022/4023/4024 support
• Small PCB (3.81x3.81 cm) (1.5x1.5 inch)
• One populated PCB: MCP4021-103E/SN configured as a “windowed” potentiometer, PIC10F206-I/OT with firmware
• Sample firmware to interface the PIC10F206 with push buttons & the MCP402X: Interprets momentary switch inputs to determine what serial command to execute, Uses a high-speed oscillator output to create a low-cost charge pump for HV commands, PCB supports In-Circuit Serial Programming using the BFMP programming header
• One un-populated PCB for rapid prototyping of an MCP402X application
• Sample kit with 1 PIC10F206-I/OT and 2ea of theMCP4021-I/SN (2.1kΩ, 5kΩ,10kΩ & 50kΩ)

Digital Potentiometer - Microchip