MAX5481

10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers

Single 1024-Tap Digital Potentiometers


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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 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.
MAX5481, MAX5482, MAX5483, MAX5484: Pin Configurations MAX5481, MAX5482, MAX5483, MAX5484: Pin Configurations Enlarge+

Key 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 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

Applications/Uses

  • Gain and Offset Adjustment
  • LCD Contrast Adjustment
  • Low-Drift Programmable Gain Amplifiers
  • Mechanical Potentiometer Replacement
  • Pressure Sensors
Part NumberTaperPOTsControl InterfaceWiper MemoryStepsREND-TO-END
(kΩ)
Res. Tol.
(%)
Temp. Coeff.
(ppm/°C)
ICC @5V
(µA)
Package/PinsBudgetary
Price
typmaxSee Notes
MAX5481 Linear13-Wire Serial SPINon-Volatile10241025351
TQFN/16
TSSOP/14
$2.38 @1k
MAX5482 50
TQFN/16
TSSOP/14
MAX5483 10
TQFN/16
TSSOP/14
MAX5484 50
TQFN/16
TSSOP/14
See All Digital Potentiometers (124)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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