Dual 256-Tap / Low-Drift / Digital Potentiometers - Maxim
Description
19-1934; Rev 1; 4/01
Dual 256-Tap, Low-Drift, Digital Potentiometers in 10-µMAX
General 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 10pin µMAX package.
Each device is guaranteed over the extended industrial temperature range (-40°C to +85°C).
o 256-Tap Positions o Ultra Low 0.
1µA Supply Current o +2.
7V to +5.
5V Single-Supply Operation o Low End-To-End Temperature Coefficient: 35ppm/°C o Low Ratiometric Temperature Coefficient: 5ppm/°C o Power-On Reset: Wiper Goes to Midscale (Position 128) o Glitchless Switching Between Resistor Taps o 3-Wire SPI™ -Interface Compatible o 10kΩ/50kΩ/100kΩ Resistor Values
Features
o 10-Pin µMAX Small Footprint Package
MAX5403/MAX5404/MAX5405
Applications
Mechanical Potentiometer Replacement Low-Drift Programmable Gain Amplifier (PGA) Volume Control LCD Screen Adjustment Adjustable Voltage Reference Pr...
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