LM393ADR datasheet by Texas Instruments

LM393ADR Frequently Asked Questions (FAQs)

• What is the maximum voltage that can be applied to the input pins?
  The maximum voltage that can be applied to the input pins is the supply voltage (VCC) + 0.3V. Exceeding this voltage can cause damage to the device.
• How do I ensure the comparator output is stable and not oscillating?
  To ensure a stable output, add a small capacitor (e.g., 10nF) between the output pin and ground to filter out high-frequency noise. Additionally, ensure the input signals are clean and free from noise.
• What is the minimum input voltage required for the comparator to function correctly?
  The minimum input voltage required is 2V, but it's recommended to operate the comparator with a minimum of 4V to ensure proper functionality.
• Can I use the LM393ADR as an amplifier?
  No, the LM393ADR is a comparator, not an amplifier. It's designed to compare two input voltages and output a digital signal, not to amplify a signal.
• How do I handle the open-drain output of the LM393ADR?
  The open-drain output requires an external pull-up resistor to VCC to function correctly. The value of the resistor depends on the specific application, but a typical value is 1kΩ to 10kΩ.