What the DS1804-010+ does in a design
The DS1804-010+ is a single-channel, 100-tap digital potentiometer with a linear taper and a total end-to-end resistance of 10kΩ. It stores the wiper position in non-volatile memory, so the setting survives power cycling — no need to re-initialize at boot. The 3-wire up/down interface (U/D, INC, CS) is straightforward to drive from a microcontroller GPIO, and the supply range from 2.7V to 5.5V covers both 3.3V and 5V logic rails. Typical applications include trimming reference voltages, setting comparator thresholds, adjusting gain in op-amp circuits, and calibrating sensor offsets in industrial control or instrumentation.
Package and mounting — through-hole for prototyping and low-volume production
Housed in an 8-pin DIP package (0.300" body width, 7.62mm pitch), the DS1804-010+ is through-hole only. The 8-PDIP footprint is a standard layout, and the 400Ω typical wiper resistance is low enough not to distort the divider ratio at the 10kΩ end-to-end value.
The ±20% resistance tolerance means the absolute end-to-end resistance can vary from 8kΩ to 12kΩ across parts — fine for ratiometric applications like a voltage divider, but not for setting an absolute current limit without a trim step. The 750ppm/°C temperature coefficient is typical for a digital pot of this generation; a 50°C temperature swing shifts the resistance by about 3.75%, which matters if the pot sets a precision bias in a temperature-varying environment. For tight calibration loops, plan for a one-time calibration at the system level.