DS1804-010 datasheet by Maxim Integrated Products

DS1804-010 Frequently Asked Questions (FAQs)

• What is the recommended layout and routing for the DS1804-010 to minimize noise and ensure reliable operation?
  Maxim Integrated recommends following a star-grounding scheme, keeping the digital and analog grounds separate, and using a solid ground plane to minimize noise. Additionally, keep the input and output traces short and away from each other to prevent crosstalk.
• How do I ensure that the DS1804-010 is properly powered and what are the power sequencing requirements?
  The DS1804-010 requires a single 3.3V or 5V power supply. Ensure that the power supply is clean and well-regulated. Power sequencing is not critical, but it is recommended to power up the device after the power supply has stabilized.
• What is the maximum capacitance that can be connected to the digital potentiometer's wiper terminal?
  The maximum capacitance that can be connected to the digital potentiometer's wiper terminal is 100nF. Exceeding this value may cause instability or oscillations in the device.
• How do I implement a non-volatile memory solution for the DS1804-010?
  The DS1804-010 does not have built-in non-volatile memory. However, you can use an external EEPROM or flash memory to store the wiper position and recall it during power-up. Maxim Integrated provides an application note (AN1896) that describes a non-volatile memory solution using an external EEPROM.
• What is the recommended method for daisy-chaining multiple DS1804-010 devices?
  To daisy-chain multiple DS1804-010 devices, connect the SCL and SDA lines in series, and use a separate CS line for each device. Ensure that each device has a unique address by setting the A0 and A1 pins accordingly.