MAX5495:10-Bit, Dual, Nonvolatile, Linear-Taper Digital Potentiometers

The MAX5494–MAX5499 10-bit (1024-tap), dual, nonvolatile, linear-taper, programmable voltage-dividers and variable resistors perform the function of a mechanical potentiometer, but replace the mechanics with a 3-wire SPI™-compatible serial interface. The MAX5494/MAX5495 are dual, 3-terminal, programmable voltage-dividers; the MAX5496/MAX5497 are dual, 2-terminal variable resistors; and the MAX5498/MAX5499 include one 2-terminal variable resistor and one 3-terminal programmable voltage-divider. The MAX5494–MAX5499 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. The MAX5494–MAX5499 are ideal for applications requiring digitally controlled potentiometers. End-to-end resistance values of 10kΩ and 50kΩ are available with a 35ppm/°C end-to-end temperature coefficient. The ratiometric temperature coefficient is 5ppm/°C for each channel, making these devices ideal for applications requiring low-temperature-coefficient programmable voltage-dividers such as low-drift, programmable-gain amplifiers. The MAX5494–MAX5499 operate with either a single power supply (+2.7V to +5.25V) or dual power supplies (±2.5V). The devices consume 400µA (max) of supply current when writing data to the nonvolatile memory and 1.5µA (max) of standby supply current. The devices are available in space-saving (5mm x 5mm x 0.8mm), 16-pin TQFN package and are specified over the extended (-40°C to +85°C) temperature range.

Key Features
  • Wiper Position Stored in Nonvolatile Memory and Recalled Upon Power-Up
  • 16-Pin, 5mm x 5mm x 0.8mm TQFN Package
  • 35ppm/°C End-to-End Resistance Temperature Coefficient
  • 5ppm/°C Ratiometric Temperature Coefficient
  • 10kΩ and 50kΩ End-to-End Resistor Values
  • 3-Wire SPI-Compatible Serial Interface
  • Reliability (TA = +85°C)
    • 50,000 Wiper Store Cycles
    • 50 Years Wiper Data Retention
  • 1.5µA (max) Standby Current
  • Single +2.7V to +5.25V Supply Operation
  • Dual ±2.5V Supply Operation
MAX5494, MAX5495, MAX5496, MAX5497, MAX5498, MAX5499: Pin Configurations
MAX5494, MAX5495, MAX5496, MAX5497, MAX5498, MAX5499: Pin Configurations
Applications/Uses
  • Gain and Offset Adjustment
  • LCD Contrast Adjustment
  • Low-Drift Programmable-Gain Amplifiers
  • Mechanical Potentiometer Replacement
  • Pressure Sensors
  • Volume Control
DataSheet
titleDownload file
MAX5494-MAX5499 Data SheetMAX5494-MAX5499.pdf
Parametrics
Part NumberTaperPOTsControl InterfaceWiper MemoryStepsREND-TO-END
(kΩ)
Res. Tol.
(%)
Temp. Coeff.
(ppm/°C)
ICC @5V
(µA)
Package/PinsBudgetary
Price
typmaxSee Notes
MAX5494Linear23-Wire Serial SPINon-Volatile10241025351.5TQFN/16$3.77 @1k
MAX549550TQFN/16$3.77 @1k
MAX549610TQFN/16$3.77 @1k
MAX549750TQFN/16$3.77 @1k
MAX549810TQFN/16$3.67 @1k
MAX549950TQFN/16$3.77 @1k
Design kits & evaluation modules
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX5495ETENo Longer AvailableMAX5495ETE+TQFN,;16 pin;26 mm²-40°C to +85°CNo
MAX5495ETE+ActiveTQFN,;16 pin;26 mm²-40°C to +85°CLead Free
MAX5495ETE+TActiveTQFN,;16 pin;26 mm²-40°C to +85°CLead Free
MAX5495ETE-TNo Longer AvailableMAX5495ETE+TQFN;16 pin-40°C to +85°CSee data sheet
MAX5494-MAX5499.pdf MAX5499
Scaling Power-Supply Slopes with a Reliable Power-On Reset (POR) MAX5495
MAX5494-MAX5499.pdf MAX5499