Features and Benefits
- 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 Temperature Coefficient
- 10kΩ and 50kΩ End-to-End Resistor Values
- Pin-Selectable SPI-Compatible Serial Interface or Up/Down Digital Interface
- 1µA (max) Standby Current
- Single +2.7V to +5.25V Supply Operation
- Dual ±2.5V Supply Operation
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 pin-configurable 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-to-end resistance values are available (10kΩ and 50kΩ) in a voltage-divider or a variable-resistor configuration (see the Selector Guide in the full data sheet). 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.
- Gain and Offset Adjustment
- LCD Contrast Adjustment
- Low-Drift Programmable Gain Amplifiers
- Mechanical Potentiometer Replacement
- Pressure Sensors
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
MAX5482 Reliability Data1/12/202333K
Damage from a Lightning Bolt or a Spark—It Depends on How Tall You Are!9/12/2012
Self-Starting Can Be Hard to Do - Understanding Power-on-Reset Requirements in Regulators and Bandgaps12/14/2011
How to Calculate the Wiper Voltage of a Digital Potentiometer9/27/2008
Logging the Linear Digital Potentiometer3/8/2007
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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