The maximum power dissipation of the MC4558IDT is 670mW, which is calculated based on the maximum junction temperature (TJ) of 150°C and the thermal resistance (RthJA) of 125°C/W.
To ensure stability in a unity-gain configuration, it's recommended to add a capacitor (typically 10-100pF) between the output and the inverting input to compensate for the internal pole. Additionally, ensure that the layout is well-designed to minimize parasitic capacitance and inductance.
The recommended operating voltage range for the MC4558IDT is 3V to 36V, with a maximum differential input voltage of ±15V. However, it's essential to ensure that the voltage supply is well-regulated and free from noise to maintain optimal performance.
To minimize noise and oscillations, use a well-regulated power supply, decouple the power pins with 10uF and 100nF capacitors, and ensure a low-impedance ground plane. Additionally, use a shielded cable for the input signal and keep the input wiring short and direct.
The maximum input impedance of the MC4558IDT is approximately 2MΩ, which is suitable for most general-purpose applications. However, if a higher input impedance is required, consider using a FET-input op-amp or a dedicated high-input-impedance amplifier.
MC4558IDT datasheet
by STMicroelectronics
