The slew rate of an op-amp defines how fast its output voltage can swing — if it's too slow for your signal, the output distorts. Select a calculation mode (Minimum Slew Rate, Maximum Frequency, or Maximum Voltage), then enter your peak voltage amplitude, signal frequency, and optionally your op-amp's slew rate to get the calculated result along with the formula used.
Calculated Result
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Slew rate is the maximum rate of change of output voltage per unit time for an operational amplifier. It's typically expressed in volts per microsecond (V/μs) and represents how quickly the op-amp can change its output voltage.
The minimum slew rate is calculated using the formula: S_min = 2πfA, where f is frequency in Hz and A is peak voltage amplitude in volts. This ensures the op-amp can faithfully reproduce the desired signal without distortion.
If the slew rate is insufficient, the output signal will be distorted. High-frequency signals or large amplitude signals will appear clipped or rounded off, as the op-amp cannot change its output voltage fast enough to follow the input.
Slew rate determines the maximum frequency and amplitude combination your circuit can handle. It's critical for audio applications, high-speed signals, and any application where signal fidelity is important.
Bandwidth refers to the frequency range where the op-amp maintains its gain, while slew rate refers to how fast the output can change. Both can limit high-frequency performance, but slew rate specifically affects large signal behavior.
Calculate the minimum required slew rate using your maximum expected frequency and voltage amplitude. Then choose an op-amp with a slew rate at least 2-3 times higher than your calculated minimum for safety margin.
The slew rate is an inherent characteristic of the op-amp and cannot be improved externally. You must select an op-amp with adequate slew rate specification for your application requirements.