MAX5407

19-2196; Rev 0; 10/01 32-Tap Audio Logarithmic Taper Digital Potentiometer General Description The MAX5407 SOT-PoT™ is a logarithmic taper digital potentiometer with 32 tap points that has 1dB steps between taps. This device is ideal for audio applications, such as volume control and fading/balancing audio signals. The MAX5407 consists of a resistor string and CMOS switches that are digitally controlled through a simple 2wire serial interface. This device performs the same function as a mechanical potentiometer. The device has a fixed end-to-end resistance of 20kΩ and features zero-crossing detection to minimize the audible noise generated by the wiper transitions. This device has nominal resistor temperature coefficients of 35ppm/°C end-to-end and 5ppm/°C ratiometric. The MAX5407 is available in a space saving 8-pin SOT23 package and is guaranteed from -40°C to +85°C. Features o Miniature 3mm x 3mm 8-Pin SOT23 Package o Logarithmic Taper with 1dB Steps Between Taps o 32 Tap Positions o Low 0.35µA Supply Current o +2.7V to +5.5V Single-Supply Operation o Zero-Crossing Detection to Minimize Audible Clicks During Wiper Transitions o Simple Up/Down 2-Wire Serial Data Interface o Power-On Reset Wiper Goes To Maximum Attenuation (Lowest Tap Position) o 20kΩ End-to-End Resistance MAX5407 Applications Audio Volume Control Fading/Balancing Audio Signals Mechanical Potentiometer Replacement PART MAX5407EKA Ordering Information TEMP. RANGE -40°C to +85°C PINPACKAGE 8 SOT23 TOP MAR...