10-Bit, Dual, Nonvolatile, Linear-Taper Digital Potentiometers
Description
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 (
Key Features
- Wiper Position Stored in Nonvolatile Memory and Recalled Upon Power-Up
- 16-Pin,
- 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 = +
- 50,000 Wiper Store Cycles
- 50 Years Wiper Data Retention
- 50,000 Wiper Store Cycles
- 1.5µA (max) Standby Current
- Single +2.7V to +5.25V Supply Operation
- Dual ±2.5V Supply Operation
Applications/Uses
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· Gain and Offset Adjustment |
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LCD Contrast Adjustment |
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Low-Drift Programmable-Gain Amplifiers |
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Mechanical Potentiometer Replacement |
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Pressure Sensors |
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Volume Control |
Diagram
Pin Configurations
Supplier
FROM: Company Name: Aunytor Electronic (HK) Co.,Ltd
Contact Person: Charlotte
Skype: Aunytor
whatsapp：+86 13537622113
Email: carrot@aunytorchips.com