Dual-channel 45kΩ logarithmic potentiometer for audio-level control
The DS1801E-014+ is a dual-channel, 65-tap digital potentiometer from Analog Devices, configured with a logarithmic taper and a total end-to-end resistance of 45kΩ per channel. The logarithmic taper makes this part a natural fit for audio volume and gain staging, where the human ear's response to loudness follows a log curve — linear steps would produce uneven perceived jumps. Each potentiometer integrates cascade, mute, and zero-cross sense functions, allowing multiple devices to be daisy-chained and enabling pop-free level transitions during signal switching.
Wiper resistance, supply range, and temperature envelope
The wiper resistance is 400Ω typical, which sets a floor on the minimum output impedance at the wiper terminal — relevant when driving a low-impedance load directly without a buffer. The temperature coefficient is 750ppm/°C typical, meaning the 45kΩ end-to-end resistance drifts about 34Ω per °C — not a problem for ratio-metric volume control but worth noting if absolute resistance tolerance matters in a divider.
Package, interface, and memory type
The digital interface is serial (3-wire SPI-compatible), requiring only chip-select, clock, and data lines to program both channels — minimal GPIO overhead on the host controller. Memory is volatile, so the wiper position defaults to mid-scale on power-up and must be re-initialised after each power cycle — a consideration for designs that must retain volume settings across power loss.
Sourcing posture and compliance
RoHS3 compliant (2011/65/EU + 2015/863) with no exemptions claimed, so it passes into EU-market assemblies without a RoHS-declaration gap.