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TMCS1100 Datasheet(PDF) 27 Page - Texas Instruments |
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TMCS1100 Datasheet(HTML) 27 Page - Texas Instruments |
27 / 50 page Time (4Ps/div) -15 0.5 0 1 15 1.5 30 2 45 2.5 60 3 75 3.5 90 4 IIN V1 V2 Time (s) 0 -5 0.5 -4 1 -3 1.5 -2 2 -1 2.5 0 3 1 3.5 2 4 3 4.5 4 5 5 5.5 6 0 .00005 .0001 .00015 .0002 .00025 D015 VOUT Input Current VOUT, 100 kHz Filter 27 TMCS1100 www.ti.com SBOS820A – SEPTEMBER 2019 – REVISED JUNE 2020 Product Folder Links: TMCS1100 Submit Documentation Feedback Copyright © 2019–2020, Texas Instruments Incorporated Feature Description (continued) 9.3.3.4 Transient Response The TMCS1100 signal chain includes a precision analog front end followed by a sampled integrator. At the end of each integration cycle, the signal propagates to the output. Depending on the alignment of a change in input current relative to the sampling window, the output might not settle to the final signal until the second integration cycle. Figure 43 shows a typical output waveform response to a 10kHz sine wave input current. For a slowly varying input current signal, the output is a discrete time representation with a phase delay of the integration sampling window. Adding a first order filter of 100kHz effectively smooths the output waveform with minimal impact to phase response. Figure 43. Response Behavior to 10kHz Sine Wave Input Current Figure 44 shows two transient waveforms to an input-current step event, but occurring at different times during the sampling interval. In both cases, the full transition of the output takes two sampling intervals to reach the final output value. The timing of the current event relative to the sampling window determines the proportional amplitude of the first and second sampling intervals. Figure 44. Transient Response to Input-Current Step Sufficient for 1-V Output Swing The output value is effectively an average over the sampling window; therefore, a large-enough current transient can drive the output voltage to near the full scale range in the first sample response. This condition is likely to be true in the case of a short-circuit or fault event. Figure 45 shows an input-current step twice the full scale measurable range with two output voltage responses illustrating the effect of the sampling window. The relative timing and size of the input current transition determines both the time and amplitude of the first output transition. In either case, the total response time is slightly longer than one integration period. |
Número de pieza similar - TMCS1100_V01 |
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Descripción similar - TMCS1100_V01 |
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