ADE7878ACPZ Analog Devices Inc, ADE7878ACPZ Datasheet - Page 73

• Manufacturer Part Number: ADE7878ACPZ
• Description: IC ENERGY METERING 3PH 40LFCSP
• Manufacturer: Analog Devices Inc

Specifications of ADE7878ACPZ

• Input Impedance: 400 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 2.4V
• Voltage - I/o Low: 0.4V
• Current - Supply: 22mA
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-WFQFN, CSP Exposed Pad
• Meter Type: 3 Phase
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LFCSP
• No. Of Pins: 40
• Msl: MSL 1 - Unlimited
• Peak Reflow Compatible (260 C): Yes
• Supply Voltage Min: 3V
• Rohs Compliant: Yes
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SILICON ANOMALY
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 and to 4.
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
Version = 2
Version = 4
FUNCTIONALITY ISSUES
Table 25. Offset RMS Registers Cannot be Set to Negative Values [er001, Version = 2 Silicon]
Background
Issue
Workaround
Related Issues
Table 26. Values Written to the CF1DEN, CF2DEN, CF3DEN, SAGLVL, and ZXTOUT Registers May Not Be Immediately Used By
ADE7854, ADE7858, ADE7868, ADE7878 [er002, Version = 2 Silicon]
Background
Issue
Workaround
Related Issues
Usually, the CF1DEN, CF2DEN, CF3DEN, SAGLVL, and ZXTOUT registers initialize immediately after power-up or after a
hardware/software reset. After the RUN register is set to 1, the energy-to-frequency converter (for CF1DEN, CF2DEN, and CF3DEN), the
phase voltage sag detector (for SAGLVL), and the zero-crossing timeout circuit (for ZXTOUT) use these values immediately.
After the CF1DEN register is initialized with a new value after power-up or a hardware/software reset, the new value may be
delayed and, therefore, not immediately available for use by the energy-to-frequency converter. It is, however, used by the
converter after the first high-to-low transition is triggered at t the CF1 pin using the CF1DEN default value (0x0).
CF2DEN and CF3DEN registers present similar behavior at the CF2 and CF3 pins, respectively. CF1DEN, CF2DEN and CF3DEN
above behavior has been corrected in Version = 4 silicon.
After the SAGLVL register is initialized with a new value after power-up or a hardware or software reset, the new value may be
delayed and not available for immediate use by the phase voltage sag detector. However, it is used by the detector after at least
one phase voltage rises above 10% of the full-scale input at the phase voltage ADCs.
After the ZXTOUT register is initialized with a new value after power-up or a hardware or software reset, the new value may be
delayed and not available for immediate use by the zero-crossing timeout circuit. However, the circuit does use the new value
after at least one phase voltage rises above 10% of the full-scale input at the phase voltage ADCs.
If the behavior outlined in the Issue row does not conflict with the meter specification, then the new values of the CF1DEN,
CF2DEN, CF3DEN, SAGLVL, and ZXTOUT registers may be written one time only.
If the behavior is not acceptable, write the new value into the CF1DEN, CF2DEN, and CF3DEN registers eight consecutive times.
This ensures the probability of the new value not being considered immediately by the energy-to-frequency converter becomes
lower than 0.2 ppm.
Usually, at least one of the phase voltages is greater than 10% of full scale after power-up or after a hardware/software reset. If
this cannot be guaranteed, then the SAGLVL and ZXTOUT registers should also be written eight consecutive times to reduce the
probability of not being considered immediately by the phase voltage sag detector and zero-crossing timeout circuit.
None.
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.
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.
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.
None.
ADE7858ACPZ
ADE7868ACPZ
ADE7878ACPZ
ADE7858ACPZ
ADE7868ACPZ
ADE7878ACPZ
Chip Marking
ADE7854ACPZ
ADE7854ACPZ
Silicon Status
Released
Released
Rev. D | Page 73 of 96
Anomaly Sheet
Rev. A
Rev. B
ADE7854/ADE7858/ADE7868/ADE7878
No. of Reported Issues
4 (er001, er002, er003, er004)
1 (er005)