10-Bit / Nonvolatile - Linear-Taper Digital Potentiometers
Description
19-3708; Rev 3; 4/07
www.
DataSheet4U.
com
10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers
General Description
The MAX5481–MAX5484 10-bit (1024-tap) nonvolatile, linear-taper, programmable voltage-dividers and variable resistors perform the function of a mechanical potentiometer, but replace the mechanics with a pinconfigurable 3-wire serial SPI™-compatible interface or up/down digital interface.
The MAX5481/MAX5482 are 3-terminal voltage-dividers and the MAX5483/MAX5484 are 2-terminal variable resistors.
The MAX5481–MAX5484 feature an internal, nonvolatile, electrically erasable programmable read-only memory (EEPROM) that stores the wiper position for initialization during power-up.
The 3-wire SPI-compatible serial interface allows communication at data rates up to 7MHz.
A pin-selectable up/down digital interface is also available.
The MAX5481–MAX5484 are ideal for applications requiring digitally controlled potentiometers.
Two end-toend resistance values are available (10kΩ and 50kΩ) in a voltage-divider or a variable-resistor configuration (see the Selector Guide).
The nominal resistor temperature coefficient is 35ppm/°C end-to-end, and only 5ppm/°C ratiometric, making these devices ideal for applications requiring low-temperature-coefficient voltage-dividers, such as low-drift, programmable gain-amplifiers.
The MAX5481–MAX5484 operate with either a +2.
7V to +5.
25V single power supply or ±2.
5V dual power supplies.
These devices consume 400µA (max) of supply current when writing data to the nonvolatile memory and 1.
0µA (max) of standby supply current.
The MAX5481–MAX5484 are available in a space-saving (3mm x 3mm), 16-pin TQFN, or a 14-pin TSSOP package and are specified over the extended (-40°C to +85°C) temperature range.
Features
♦ 1024 Tap Positions ♦ Power-On Recall of Wiper Position from Nonvolatile Memory ♦ 16-Pin (3mm x 3mm x 0.
8mm) TQFN or 14-Pin TSSOP Package ♦ 35ppm/°C End-to-End Resistance Temperature Coefficient ♦ 5ppm/°C Ratiometric Tempera...
Similar Datasheet
