MAX5403
Dual, 256-Tap, Low-Drift, Digital Potentiometers in 10-µMAX
Industry's Smallest Dual Digital Potentiometer
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Overview
Features and Benefits
- 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
Product Details
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).
Applications
- Adjustable Voltage Reference
- Impedance Matching
- LCD Screen Adjustment
- Low-Drift Programmable Gain Amplifier (PGA)
- Mechanical Potentiometer Replacement
- Programmable Filters, Delays, Time Constant
- Volume Control
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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.
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