This document describes the features and characteristics of the DS1802, a dual audio taper potentiometer. These include ultra-low power consumption, operation from 3V or 5V supplies, two digitally controlled 65-position potentiometers, logarithmic resistive characteristics, zero-crossing detection, and more.
The DS1802 is a dual audio‑taper potentiometer with logarithmic resistive characteristics (1 dB per step) and 65 wiper positions per potentiometer. It offers both digital control via a 3‑wire serial interface and mechanical push‑button control, including mute and zero‑crossing detection to minimize audible noise.
The device operates from 3 V or 5 V supplies, is available in 20‑pin DIP, SOIC and TSSOP packages, and works over an ambient temperature range of –40 °C to +85 °C. Multiple DS1802 units can be daisy‑chained for cascade operation, and each potentiometer provides a mute position at step 64.
| Number of positions per potentiometer | 65 |
|---|---|
| Resistance available | 45 kΩ |
| Supply voltage | 3 V to 5 V |
| Operating temperature range | -40 °C to +85 °C |
| Logarithmic step size | 1 dB per step |
| Mute position | Position 64 |
| Package pin count | 20 pins |
Each potentiometer in the DS1802 provides 65 wiper positions, with position 64 used as the mute level.
The DS1802 operates from either a 3 V or a 5 V supply.
The device is specified to operate from –40 °C up to +85 °C.
It can be controlled via a 3‑wire serial interface or by contact‑closure (push‑button) inputs, with optional mute and zero‑crossing detection features.