32抽头，非易失，线性变化数字电位器 32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers
General Description
The MAX5471/MAX5472/MAX5474/MAX5475 linear taper digital potentiometers function as mechanical potentiometers, but replace the mechanics with a simple 3-wire up/down digital interface. These digital potentiometers feature nonvolatile memory EEPROM to return the wiper to its previously stored position upon power-up.
The MAX5471/MAX5472 are 2-terminal, variable resistors in 6-pin SOT23 packages. The MAX5474/MAX5475 are 3-terminal potentiometers in 8-pin SOT23 packages.
Features
♦ Wiper Position Stored in Nonvolatile Memory and Recalled Upon Power-Up
♦ Tiny SOT23 Package
♦ 35ppm/°C End-to-End Resistance Temperature Coefficient
♦ 5ppm/°C Ratiometric Temperature Coefficient
♦ 32 Tap Positions
♦ Voltage-Divider or Variable-Resistor Potentiometer Configuration
♦ 50kΩ and 100kΩ End-to-End Resistance Values
♦ 1µA max Static Supply Current
♦ 2.7V to 5.25V Single-Supply Operation
♦ 200,000 Wiper Store Cycles
♦ 50-Year Wiper Data Retention
Applications
Mechanical Potentiometer Replacement
Liquid-Crystal-Display LCD Screen Adjustment
Audio Volume Control
Programmable Filters
