5 kΩ linear digital potentiometer with non-volatile wiper storage
The MCP4023T-502E/CH is a single-channel digital potentiometer from Microchip's WiperLock™ series, offering a 5 kΩ end-to-end resistance with linear taper and 64 wiper tap positions. Non-volatile memory retains the wiper setting after power-down, eliminating the need for a separate EEPROM or microcontroller re-initialization routine on each power-up. The Up/Down (U/D, CS) interface uses two digital lines for wiper position control, simplifying firmware integration compared to SPI or I²C alternatives.
Industrial temperature grade and supply flexibility
The SOT-23-6 package (supplier device package SOT-23-6) occupies minimal board area — approximately 2.9 mm × 1.6 mm — and is compatible with standard reflow soldering profiles.
Wiper resistance and temperature coefficient impact on accuracy
Typical wiper resistance is 70 Ω, which adds to the programmed resistance value and sets a floor on the minimum achievable resistance between wiper and terminal B. Temperature coefficient of 150 ppm/°C means the resistance drifts by 0.75 Ω per °C at the 5 kΩ full-scale setting — acceptable for bias and adjustment circuits but relevant for precision divider applications requiring better than 1% stability over temperature. Resistance tolerance is ±20%, so the absolute end-to-end resistance of a given unit may range from 4 kΩ to 6 kΩ; this must be accounted for in the circuit design if the absolute resistance value is critical.