Other Parts Discussed in Thread: TMS320F28377D-EP
Hi Alexander-san,
We would like to sense the motor current by AMC1300B-Q1 and 16bit ADC of TMS320F28377D-EP.
I have two questions.
Could you please let us know if you have any concern and advice?
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[Q1: input filter]
Maximum frequency of motor current is 3.65kHz.
I understand that your recommended frequency range and CFLT, RFLT.
https://e2e.ti.com/support/amplifiers/f/14/p/971515/3589638#3589638
However, we would like to set the filter cutoff frequency 18.25kHz (3.65kHz * 5 times).
If we use CFLT=3.9nF, RFLT=1.2kohm values, does AMC1300B-Q1 become unstable?
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[Q2: output filter]
We would like to use 16bit ADC of TMS320F28377D-EP.
Sample window duration (set by ACQPS and PERx.SYSCLK) is 320ns(min).
Therefore, we set the output filter(ROUT and COUT) to be “less than 320ns” so ROUT=36Ω and COUT=330pF.
Could you please let us know if you have recommended(Other) design method and ROUT, COUT values?
<Circuit image>
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Regards,
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