Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Function | 6-bit volatile digital potentiometer |
| Resistance | 2.1 kΩ nominal |
| Wiper positions | 64 |
| Control interface | Up/Down serial interface |
| Supply range | 1.8 V to 5.5 V operation |
| Terminal arrangement | Terminal B internally connected to VSS |
| Package | 6-lead SOT-23 |
| Temperature grade | Extended, -40°C to +125°C |
Product Overview
The MCP4013T-202E/CH is the 2.1 kΩ extended-temperature SOT-23-6 ordering variant of Microchip’s MCP4013 volatile digital potentiometer. It provides 64 wiper positions and a simple Up/Down control interface for calibration and set-point functions that do not require nonvolatile storage.
The MCP4013 differs from a fully floating three-terminal potentiometer because terminal B is internally tied to VSS. That connection is an important design constraint: the part is well suited to grounded voltage-divider and trimming functions, but it should not be selected where all three resistor terminals must float independently.
Technical Specifications
| Parameter | Confirmed Information |
|---|---|
| Resolution | 6 bit / 64 steps |
| Nominal resistance | 2.1 kΩ |
| Power-on wiper code | 1Fh, mid-scale |
| Operating voltage | 1.8 V to 5.5 V |
| Typical wiper resistance | 75 Ω |
| Control | U/D serial control |
| Terminal B | Internally connected to VSS |
| Typical ratiometric tempco | 10 ppm/°C at mid-scale |
| Operating temperature | -40°C to +125°C |
| Package | SOT-23-6 |
Design Considerations
Because the wiper setting is stored in volatile RAM, the device returns to its defined mid-scale state after power-up. A system that requires a calibrated setting after every restart must therefore restore the desired code through the U/D interface during initialization.
The 2.1 kΩ value is specific to the -202 resistance code. Wiper resistance becomes a larger fraction of the programmed resistance near the low end of the range, so accuracy should be evaluated at the intended code rather than from the nominal end-to-end resistance alone.
Related Engineering Resources
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