The fourth method is to evaluate the SR in small input signal charts. Use the chart with the smallest input signal and highest noise gain. It can be necessary to zoom in to accurately measure the waveform relative to division scaling to get the initial slew rate after any internal capacitive-forward coupling. The time division of the TLV9001 waveform is too long, making the rise and fall appear to be vertical lines, so it is not possible to determine waveform SR with any accuracy. The TLV9001 waveform does not indicate boost or no boost. The LMV831 waveform is a great waveform to use as an indicator because the input is small, NG is high, and scaling makes rise and fall time measurable. The initial slew rate is consistent with the rest of the rising slew rate, so this section can be used for evaluation. Initial SR of the green oval area is 0.25V/µs. The 10mV V_ID translates to 14% SR[max] using Figure 3-1. The data sheet value (2V/µs) scaled by 14% is 0.28V/µs. The small signal slew rate of the waveform, 0.25V/µs, closely matches the calculated slew rate, 0.28V/µs. Based on these calculations, the LMV831 device does not have slew boost.

Figure 4-3 TLV9001 Small Signal Waveform

Figure 4-4 LMV831 Small Signal Waveform