Datasheet ADE7854, ADE7858, ADE7868, ADE7878 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Polyphase Multifunction Energy Metering IC |
| Pages / Page | 4 / 1 — Polyphase Multifunction Energy Metering IC. Silicon Anomaly. ADE7854. … |
| File Format / Size | PDF / 81 Kb |
| Document Language | English |
Polyphase Multifunction Energy Metering IC. Silicon Anomaly. ADE7854. /ADE7858. /ADE7868. /ADE7878
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Polyphase Multifunction Energy Metering IC Silicon Anomaly ADE7854 /ADE7858 /ADE7868 /ADE7878
This anomaly list describes the known issues with the ADE7854, ADE7858, ADE7868, and ADE7878 silicon identified by the version register (Address 0xE707) being equal to 2, to 4, and to 5. Analog Devices, Inc., is committed, through future silicon revisions, to continuously improve silicon functionality. Analog Devices tries to ensure that these future silicon revisions remain compatible with your present software/systems by implementing the recommended workarounds outlined here.
ADE7854/ADE7858/ADE7868/ADE7878 FUNCTIONALITY ISSUES Silicon Revision Identifier Chip Marking Silicon Status Anomaly Sheet No. of Reported Issues
Version = 2 ADE7854ACPZ Released Rev. A 4 (er001, er002, er003, er004) ADE7858ACPZ ADE7868ACPZ ADE7878ACPZ Version = 4 ADE7854ACPZ Released Rev. B 1 (er005) ADE7858ACPZ ADE7868ACPZ ADE7878ACPZ Version = 5 ADE7854ACPZ Released Rev. C 1 (er005) ADE7858ACPZ ADE7868ACPZ ADE7878ACPZ
FUNCTIONALITY ISSUES Table 1. Offset RMS Registers Cannot be Set to Negative Values [er001, Version = 2 Silicon] Background
When the AIRMSOS, AVRMSOS, BIRMSOS, BVRMSOS, CIRMSOS, CVRMSOS, and NIRMSOS registers are set to a negative value, for sufficiently small inputs, the argument of the square root used in the rms data path may become negative. In this case, the corresponding AIRMS, AVRMS, BIRMS, BVRMS, CIRMS, or CVRMS rms register is automatically set to 0.
Issue
Negative values for the AIRMSOS, AVRMSOS, BIRMSOS, BVRMSOS, CIRMSOS, CVRMSOS, and NIRMSOS registers are not supported in the silicon version identified by the version register being equal to 2.
Workaround
Do not use negative values for the AIRMSOS, AVRMSOS, BIRMSOS, BVRMSOS, CIRMSOS, CVRMSOS, and NIRMSOS registers. If further details on this issue are required, please use the following website to submit your query: www.analog.com/en/content/technical_support_page/fca.html.
Related Issues
None.
Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2010–2012 Analog Devices, Inc. All rights reserved.
Document Outline ADE7854/ADE7858/ADE7868/ADE7878 Functionality Issues Functionality Issues Section 1. ADE7854/ADE7858/ADE7868/ADE7878 Functionality Issues
This anomaly list describes the known issues with the ADE7854, ADE7858, ADE7868, and ADE7878 silicon identified by the version register (Address 0xE707) being equal to 2, to 4, and to 5. Analog Devices, Inc., is committed, through future silicon revisions, to continuously improve silicon functionality. Analog Devices tries to ensure that these future silicon revisions remain compatible with your present software/systems by implementing the recommended workarounds outlined here.
ADE7854/ADE7858/ADE7868/ADE7878 FUNCTIONALITY ISSUES Silicon Revision Identifier Chip Marking Silicon Status Anomaly Sheet No. of Reported Issues
Version = 2 ADE7854ACPZ Released Rev. A 4 (er001, er002, er003, er004) ADE7858ACPZ ADE7868ACPZ ADE7878ACPZ Version = 4 ADE7854ACPZ Released Rev. B 1 (er005) ADE7858ACPZ ADE7868ACPZ ADE7878ACPZ Version = 5 ADE7854ACPZ Released Rev. C 1 (er005) ADE7858ACPZ ADE7868ACPZ ADE7878ACPZ
FUNCTIONALITY ISSUES Table 1. Offset RMS Registers Cannot be Set to Negative Values [er001, Version = 2 Silicon] Background
When the AIRMSOS, AVRMSOS, BIRMSOS, BVRMSOS, CIRMSOS, CVRMSOS, and NIRMSOS registers are set to a negative value, for sufficiently small inputs, the argument of the square root used in the rms data path may become negative. In this case, the corresponding AIRMS, AVRMS, BIRMS, BVRMS, CIRMS, or CVRMS rms register is automatically set to 0.
Issue
Negative values for the AIRMSOS, AVRMSOS, BIRMSOS, BVRMSOS, CIRMSOS, CVRMSOS, and NIRMSOS registers are not supported in the silicon version identified by the version register being equal to 2.
Workaround
Do not use negative values for the AIRMSOS, AVRMSOS, BIRMSOS, BVRMSOS, CIRMSOS, CVRMSOS, and NIRMSOS registers. If further details on this issue are required, please use the following website to submit your query: www.analog.com/en/content/technical_support_page/fca.html.
Related Issues
None.
Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2010–2012 Analog Devices, Inc. All rights reserved.
Document Outline ADE7854/ADE7858/ADE7868/ADE7878 Functionality Issues Functionality Issues Section 1. ADE7854/ADE7858/ADE7868/ADE7878 Functionality Issues
