MCP3911 Errata

MCP3911
MCP3911 Rev. C Silicon Errata and Data Sheet Clarification
The MCP3911 parts you have received conform
functionally to the Device Data Sheet (DS20002286C),
except for the anomalies described in this document.
All the issues listed here will be addressed in future
revisions of the MCP3911 silicon.
Contact Microchip Technology Inc. for the latest Silicon
fix.
Data Sheet Clarifications
The following typographic corrections and clarifications
are to be noted for the latest version of the device data
sheet (DS20002286C):
None to report at this time.
Silicon Errata Issues
Note:
This document summarizes all silicon
errata issues from all revisions of silicon,
previous as well as current.
1. Module: MDAT Output Pins
The Modulator Data Output pins (MDAT) of this
version of silicon are not functional. No activity
will be seen on these pins.
Work around
If you are currently using this functionality of the
MCP3911 device, it is advised that you migrate
to the future derivative of the MCP3911.
2. Module: ADC Conversion
The converter internal phases can be erroneously
generated if there is a simultaneous occurrence of
a master clock edge and a reset event (a RESET
pin rising edge, the last SCK rising edge of a write
communication that generates an ADC reset and
restart as defined in Section 6.8 “Situations that
Reset ADC Data” or a Power-on Reset). This perturbation in the internal clock phase generation
can cause modulator instability and generate erroneous results, so it is highly recommended to
avoid these events becoming synchronized.
Work around
A possible work around of this issue is to freeze
the master clock during all the above detailed
events (a RESET pin rising edge, the last SCK
rising edge of a write communication that
generates an ADC reset and restart as defined in
Section 6.8 “Situations that Reset ADC Data”
or a Power-on Reset). In this case, the part will not
exhibit any issue.
 2013-2015 Microchip Technology Inc.
DS80000580B-page 1
MCP3911
APPENDIX A:
DOCUMENT
REVISION HISTORY
Rev B Document (07/2015)
• Added ADC Conversion issue and Work around.
Rev A Document (10/2013)
• Initial release of this document.
DS80000580B-page 2
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DS80000580B-page 4
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