RC4558D datasheet by Texas Instruments

RC4558D Frequently Asked Questions (FAQs)

• What is the maximum power dissipation of the RC4558D?
  The maximum power dissipation of the RC4558D is 670mW, which is calculated based on the maximum junction temperature (TJ) of 150°C and the thermal resistance (θJA) of 125°C/W.
• Can I use the RC4558D as a comparator?
  While the RC4558D can be used as a comparator, it's not the best choice due to its relatively slow slew rate (0.5V/μs) and limited bandwidth (1.5MHz). A dedicated comparator like the LM339 or LM2901 would be a better option.
• How do I ensure stability when using the RC4558D in a feedback loop?
  To ensure stability, make sure to follow proper compensation techniques, such as adding a capacitor in parallel with the feedback resistor to reduce the gain-bandwidth product. Additionally, ensure that the feedback loop has a sufficient phase margin (>45°) to prevent oscillations.
• What is the input impedance of the RC4558D?
  The input impedance of the RC4558D is typically around 2MΩ, which is relatively high. This makes it suitable for use in high-impedance circuits, such as audio amplifiers or sensors.
• Can I use the RC4558D in a single-supply configuration?
  Yes, the RC4558D can be used in a single-supply configuration, but it's essential to ensure that the input voltage is within the common-mode range (VCC-1.5V to VCC+1.5V) to maintain proper operation.