LM393ADT datasheet by STMicroelectronics

LM393ADT 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, make sure to add a small capacitor (e.g., 10nF) between the output pin and ground to filter out any noise or oscillations.
• What is the minimum input voltage difference required for the comparator to switch?
  The minimum input voltage difference required for the comparator to switch is typically around 1-2mV, but this can vary depending on the specific application and noise conditions.
• Can I use the LM393ADT as an amplifier?
  No, the LM393ADT is a comparator, not an amplifier. It is designed to compare two input voltages and output a digital signal, not to amplify a signal.
• How do I handle the output of the comparator if I need a push-pull output?
  The LM393ADT has an open-drain output, which means it can only sink current. If you need a push-pull output, you can add an external pull-up resistor or use an external transistor to create a push-pull output stage.