Table Of Contents

Transient Response and Settling Time

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    Last Modified: November 30, 2020

    Transient response

    <70 μs to recover within 0.1% of voltage range after a load current change from 10% to 90% of range, device configured for fast transient response, typical

    Maximum slew rate[1], [2]

    0.7 A/μs

    Settling time[3]

    Voltage mode, 50 V step, unloaded[4]

    <200 μs, typical

    Voltage mode, 5 V step or smaller, unloaded[5]

    <70 μs, typical

    Current mode, full-scale step, 10 A to 100 μA ranges[6]

    <50 μs, typical

    Current mode, full-scale step, 10 μA range[6]

    <150 μs, typical

    Current mode, full-scale step, 1 μA range[6]

    <300 μs, typical

    The following figures illustrate the effect of the transient response setting on the step response of the PXIe-4139 for different loads.

    Figure 1. 1 mA Range, No Load Step Response, Nominal
    Figure 2. 1 mA Range, 100 nF Load Step Response, Nominal
    • 1 Optimize transient response, overshoot, and slew rate with NI SourceAdapt by adjusting the Transient Response.
    • 2 To improve the slew rate, see Examples of Determining Extended Range Pulse Parameters and Optimizing Slew Rate using NI SourceAdapt.
    • 3 Measured as the time to settle to within 0.1% of step amplitude, device configured for fast transient response.
    • 4 Current limit set to ≥50 μA and ≥50% of the selected current limit range.
    • 5 Current limit set to ≥20 μA and ≥20% of selected current limit range.
    • 6 Voltage limit set to ≥2 V, resistive load set to 1 V/selected current range.

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