LM393ADRE4 datasheet by Texas Instruments

LM393ADRE4 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 that the comparator output is not oscillating?
  To prevent oscillation, ensure that the input signals are properly filtered and decoupled, and that the output is properly terminated. Additionally, adding a small capacitor (e.g. 10nF) between the output and ground can help to reduce oscillations.
• What is the minimum input voltage required for the comparator to function correctly?
  The minimum input voltage required for the comparator to function correctly is 1.9V. Operating the device below this voltage may result in incorrect output states.
• Can I use the LM393ADRE4 as an amplifier?
  No, the LM393ADRE4 is a comparator, not an amplifier. It is designed to compare two input voltages and output a digital signal indicating which input is higher. It is not intended for amplifying signals.
• How do I handle the case where the input signals are very close in voltage?
  When the input signals are very close in voltage, the comparator may oscillate or produce an unstable output. In such cases, consider adding hysteresis to the input signals or using a comparator with built-in hysteresis, such as the LM393AH.