ICL7135CPI+ datasheet by Maxim Integrated Products

ICL7135CPI+ Frequently Asked Questions (FAQs)

• What is the recommended power-on sequence for the ICL7135CPI+?
  The recommended power-on sequence is to apply the analog supply voltage (VCC) before the digital supply voltage (VDD). This ensures that the analog circuitry is powered up before the digital circuitry.
• How do I ensure accurate voltage measurements with the ICL7135CPI+?
  To ensure accurate voltage measurements, it is recommended to use a low-impedance voltage source, keep the input voltage within the specified range, and minimize noise and interference on the input lines.
• What is the purpose of the 'CAL' pin on the ICL7135CPI+?
  The 'CAL' pin is used to calibrate the internal voltage reference of the ICL7135CPI+. It is recommended to connect a 10kΩ resistor between the 'CAL' pin and the analog ground (AGND) to enable calibration.
• Can I use the ICL7135CPI+ with a single power supply?
  Yes, the ICL7135CPI+ can be used with a single power supply. However, it is recommended to use separate analog and digital power supplies to minimize noise and interference.
• How do I interface the ICL7135CPI+ with a microcontroller?
  The ICL7135CPI+ can be interfaced with a microcontroller using a serial interface such as SPI or I2C. The microcontroller can send commands to the ICL7135CPI+ to configure the device and read voltage measurements.