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# v6-0 to v6-1 changes
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## Introduction
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To improve the reliability and stability of the FMC ADC 100M, some components need to be changed.
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It solves the problem that some capacitors are not enough derated in their operating voltage (and this has indeed given troubles by capacitors that became resistive after a few years of operating). See [Issue 66](https://ohwr.org/project/fmc-adc-100m14b4cha-hw/issues/66).
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Secondly it solves the problem that the LDC had an output capacitor that had in the end a too low capacitance. The reason is that the used capacitor has a much lower capacitance than specified if it is used at a lower operating voltage than it is specified for. See [Issue 65](https://ohwr.org/project/fmc-adc-100m14b4cha-hw/issues/65).
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See also [Fmc adc 100m adc_power_noise_measurements](https://ohwr.org/project/fmc-adc-100m14b4cha-hw/wikis/fmc-adc-100m-adc_power_noise_measurements)
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## Required changes
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1. Replace the following 16 capacitors by a 10uF +/-10% 16V 0603 X5R or similar specified capacitors.
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The Murata GRT188R61C106KE13D is the type that will be used in our 2022 upgrade program.
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- C47, C49, C56, C58, C64, C66, C72, C74, C76, C83, C87, C90, C93, C99, C100, C103
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2. Replace L8 by a 0 Ohm 0805 jumper.
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---
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14 June 2022
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