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Dual, 256-Tap, Low-Drift, Digital Potentiometers in 10-µMAX

Industry's Smallest Dual Digital Potentiometer

Product Details

Key Features

Applications/Uses

Parametric specs for Digital Potentiometers
Steps 256
# Potentiometers 2
Control Interface 3-Wire Serial SPI
Taper Linear
Wiper Memory Volatile
REND-TO-END (kΩ) 10
Res. Tol. (%) 25
Temp. Coeff. (ppm/°C) (typ) 35
Wiper Resistance (Ω) (typ) 275
ICC @5V (µA) (max) 5
Package/Pins UMAX/10
Budgetary
Price (See Notes)
2.86
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Simplified Block Diagram

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Parameters

Parametric specs for Digital Potentiometers
Steps 256
# Potentiometers 2
Control Interface 3-Wire Serial SPI
Taper Linear
Wiper Memory Volatile
REND-TO-END (kΩ) 10
Res. Tol. (%) 25
Temp. Coeff. (ppm/°C) (typ) 35
Wiper Resistance (Ω) (typ) 275
ICC @5V (µA) (max) 5
Package/Pins UMAX/10
Budgetary
Price (See Notes)
2.86

Key Features

  • 10-Pin µMAX Small Footprint Package
  • 256-Tap Positions
  • Ultra Low 0.1µA Supply Current
  • +2.7V to +5.5V Single-Supply Operation
  • Low End-To-End Temperature Coefficient: 35ppm/°C
  • Low Ratiometric Temperature Coefficient: 5ppm/°C
  • Power-On Reset: Wiper Goes to Midscale (Position 128)
  • Glitchless Switching Between Resistor Taps
  • 3-Wire SPI™-Interface Compatible
  • 10kΩ/50kΩ/100kΩ Resistor Values

Applications/Uses

  • Adjustable Voltage Reference
  • Impedance Matching
  • LCD Screen Adjustment
  • Low-Drift Programmable Gain Amplifier (PGA)
  • Mechanical Potentiometer Replacement
  • Programmable Filters, Delays, Time Constant
  • Volume Control

Description

The MAX5403/MAX5404/MAX5405 is a family of dual linear taper digital potentiometers. Each device has one 3-terminal potentiometer and one 2-terminal variable resistor (Figure 1). The MAX5403/MAX5404/MAX5405 operate from +2.7V to +5.5V single-supply voltages and use an ultra-low supply current of 0.1µA. These devices also provide glitchless switching between resistors taps as well as a convenient power-on reset (POR) that sets the wiper to the midscale position at power-up. The potentiometer consists of a fixed resistor with a wiper contact that is digitally controlled through a 3-wire serial interface and has 256-tap points. It performs the same function as a discrete potentiometer or variable resistor.

These parts are ideal for applications requiring digitally controlled resistors. Three resistance values are available: 10kΩ (MAX5403), 50kΩ (MAX5404), and 100kΩ (MAX5405). A nominal resistor-temperature coefficient of 35ppm/°C end-to-end and 5ppm/°C ratiometric make the MAX5403/MAX5404/MAX5405 ideal for applications requiring low temperature-coefficient variable resistors, such as adjustable-gain circuit configurations.

The MAX5403/MAX5404/MAX5405 are available in a 10-pin µMAX® package. Each device is guaranteed over the extended industrial temperature range (-40°C to +85°C).

Simplified Block Diagram

MAX5403, MAX5404, MAX5405: Functional Diagram MAX5403, MAX5404, MAX5405: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .