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TimestampOriginator (First & Last Name):Comment/Concern/Recommendation:Review Board Comment:Review Board Recommendation:
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4/14/2021 8:38:05Gerard deBlasiNBATAMPBRDFDR01Has there been consideration for the original varying capacitor types? On the output side of the amplifier the original Mylars and Tantalums have been replaced with SMD ceramics; was the original design intention for Mylars considered when deciding to replace? (Ceramics have poor temperature performance, Mylars and Tantalums have better reliability and capacitance stability with DC biasing.)consider
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4/14/2021 8:40:10Gerard deBlasiNBATAMPBRDFDR02INA828 is a newer version of the selected amplifier INA128 - is there a reason not to move to it now in initial production? Are there concerns for obsolescence of the INA128?consider
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4/14/2021 8:40:28Gerard deBlasiNBATAMPBRDFDR03There are no IC reference designators on the PCB, which could be problematic for fixing or future use. The voltage on circuit capacitors is not listed, but is important for documentation.consider
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4/14/2021 8:40:58Gerard deBlasiNBATAMPBRDFDR04The input TVS diodes clamp at about 25 VDC. It could be beneficial to consider making the other caps (C20-23 and C24-27) a minimum of 50V instead of 35V. These would be more likely to survive repeated transient clamping events and reduce lifetime degradation.consider
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