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Purpose To Measure MSP430 A/D convertor input impulse noise which came from external cable DC jack contact with metal as SEI issued problem Prepared by Joe 1
Prepared by Joe 1
Purpose
To Measure MSP430 A/D convertor input impulse noise which came from external cable DC jack contact with metal as SEI issued problem
Prepared by Joe 2
Measuring point C413 pin1 for I1+, C413 pin2 for I1-
Probed PIN
Prepared by Joe 3
Contact with metal partial
female CT cable metal partial
Scissors metal partial
Prepared by Joe 4
Contact with female CT cable metal partial (1/6) Recording 100 times contact : I1+ Max. volt @1.58V and
Min. volt @-1.82 ; peak pulse width @1.6ns
Prepared by Joe 5
Contact with female CT cable metal partial (2/6) Recording 100 times contact : I1- Max. volt @2.96V and Min.
volt @-1.8 ; peak pulse width @4.4ns
Prepared by Joe 6
Contact with Scissors metal partial (3/6) Recording 100 times contact : I1+ Max. volt @2.72V and
Min. volt @-3.24 ; peak pulse [email protected]
Prepared by Joe 7
Contact with Scissors metal partial (4/6) Recording 100 times contact : I1- Max. volt @1.6V and Min.
volt @-1.72 ; peak pulse [email protected]
Prepared by Joe 8
Power ON noise (5/6) Provided fast power on noise at battery in (VDD) : I1+ Max.
volt @5.12V and Min. volt @-6.88 ; peak pulse [email protected]
Prepared by Joe 9
Power ON noise (6/6) Provided fast power on noise at battery in (VDD) : I1- Max. volt @5.36V and Min. volt @-8.56 ; peak pulse width@5ns
Prepared by Joe 10
Summary
As tested result, the impulse which came from metal contact is very small width and voltage is not so high.
Thus, the energy will less than 1pJ (around 1E-14) and provided noise is also lower than fast power on noise.
Therefore, in my opinion is that should no harm for MSP430 chipset
