Op-Amp Bandwidth & Slew Rate Check
Check whether an op-amp can sustain the target frequency and amplitude under both GBW and slew-rate limits, and get the usable upper frequency.
Key points
Op-Amp Bandwidth & Slew Rate Check: Check whether an op-amp can sustain the target frequency and amplitude under both GBW and slew-rate limits, and get the usable upper frequency. Formula: f_cl = GBW/A_cl ｜ f_FP = SR/(π·V_pp). Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. Full-power bandwidth is far below small-signal bandwidth: a 10MHz GBW part at ×10 gives 1MHz small-signal, but only ~800kHz at 2Vpp. Insufficient slew rate turns sines into triangles and adds intermodulation distortion — critical for audio and ADC drivers.
Inputs
f_cl = GBW/A_cl ｜ f_FP = SR/(π·V_pp)Calculation model (updates with parameters)
| Small-signal closed-loop bandwidth | 1 MHz | GBW/10.0 |
| Full-power bandwidth FPBW | 795.8 kHz | SR/(π·V_pp)，V_pp=2.00V |
| Usable upper frequency | 795.8 kHz | limited by slew rate |
| Margin | 1592 % | 当前 50 kHz |
| Slew rate needed at this frequency | 314.2 kV/s | Actual SR 5 MV/s |
| Gain error (finite open-loop gain) | 4.762 % | Rough estimate, phase margin not included |
Engineering notes
- Full-power bandwidth is far below small-signal bandwidth: a 10MHz GBW part at ×10 gives 1MHz small-signal, but only ~800kHz at 2Vpp.
- Insufficient slew rate turns sines into triangles and adds intermodulation distortion — critical for audio and ADC drivers.
FAQ
- What is Op-Amp Bandwidth & Slew Rate Check for?
- Check whether an op-amp can sustain the target frequency and amplitude under both GBW and slew-rate limits, and get the usable upper frequency.
- What is the formula for Op-Amp Bandwidth & Slew Rate Check?
- Core formula: f_cl = GBW/A_cl ｜ f_FP = SR/(π·V_pp). The tool returns results instantly using this formula and the selected parameters.
- What engineering notes should I keep in mind when using Op-Amp Bandwidth & Slew Rate Check?
- Full-power bandwidth is far below small-signal bandwidth: a 10MHz GBW part at ×10 gives 1MHz small-signal, but only ~800kHz at 2Vpp. Insufficient slew rate turns sines into triangles and adds intermodulation distortion — critical for audio and ADC drivers.