Linear-taper digital pot for bias and level-setting
The DS1804U-010+T&R is a 10kOhm digital potentiometer with 100 tap points and a linear taper, meaning the resistance between the wiper and either end changes in equal steps across the full range. Each step is nominally 100 ohms, giving you a predictable divider ratio for volume control, sensor bias, or programmable reference adjustment. The wiper position is stored in non-volatile memory, so the setting survives a power cycle without a microcontroller re-initializing it on every boot. This matters for trims and offsets that must hold their value across system resets.
Supply, interface, and temperature envelope
The 3-wire up/down interface (U/D, INC, CS) is a simple serial control scheme that uses only three GPIOs on the host controller. The 400 ohm typical wiper resistance sets the minimum output impedance when the wiper is at either end stop, which is a consideration for low-impedance loads or precision divider networks.
Package, tolerance, and drift
Housed in the 8-uMAX/uSOP package (3.00mm width, 0.118-inch pitch), the DS1804U-010+T&R fits on dense mixed-signal boards where board space is tight. The ±20% resistance tolerance is typical for digital potentiometers; the absolute end-to-end resistance can vary by this amount, but the ratiometric accuracy between tap positions is much tighter. The 750ppm/°C temperature coefficient means the resistance drifts about 7.5 ohms per degree Celsius on a 10kOhm part, which is a consideration if the pot sets a precision bias in a thermally varying environment.
Sourcing and compliance
Analog Devices lists the DS1804U-010+T&R as an active product with no end-of-life notice. It is ROHS3 compliant, confirming lead-free assembly compatibility for current production.