ISD203 datasheet by Isocom Components

ISD203 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the ISD203?
  A good PCB layout for the ISD203 involves keeping the analog and digital grounds separate, using a solid ground plane, and placing the device close to the audio source to minimize noise pickup. Additionally, it's recommended to use a low-ESR capacitor for the power supply decoupling.
• How do I ensure the ISD203 is properly powered and what are the power sequencing requirements?
  The ISD203 requires a single 2.4V to 3.6V power supply. It's essential to ensure that the power supply is stable and well-regulated. Power sequencing is not critical, but it's recommended to power up the device after the power supply has stabilized.
• What is the maximum audio signal amplitude that the ISD203 can handle without distortion?
  The ISD203 can handle audio signal amplitudes up to 1.5Vrms (2.1Vp-p) without distortion. Exceeding this amplitude may result in clipping and distortion.
• How do I implement a proper reset circuit for the ISD203?
  A proper reset circuit for the ISD203 involves using a pull-up resistor and a capacitor to the reset pin. The reset pin should be pulled high during power-up and held high for at least 100ms to ensure proper device initialization.
• What are the recommended values for the external components, such as resistors and capacitors, used with the ISD203?
  The recommended values for external components can be found in the ISD203 application note or evaluation board documentation. Typically, these values include 1kΩ to 10kΩ resistors and 10nF to 100nF capacitors, depending on the specific application.