ADE7878ACPZ Analog Devices Inc, ADE7878ACPZ Datasheet - Page 22

• 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

ADE7854/ADE7858/ADE7868/ADE7878
LPLINE[4:0] = 2 and LPOIL[2:0] = 3. The test period is three
50 Hz cycles (60 ms), and the Phase A current rises above the
LPOIL[2:0] threshold three times. At the end of the test period,
the IRQ1 pin is triggered low.
The I
mode reduces the power consumption required to monitor the
currents when there is no voltage input and the voltage supply
of the ADE7868/ADE7878 is provided by an external battery. If
the IRQ0 pin is triggered low at the end of a measurement period,
Table 11. Power Modes and Related Characteristics
Power Mode
PSM0
PSM1—ADE7878, ADE7868 Only
PSM2—ADE7878, ADE7868 Only
PSM3
1
Setting for all registers except the LPOILVL and CONFIG2 registers.
IA CURRENT
State After Hardware Reset
State After Software Reset
2
C or SPI port is not functional during this mode. The PSM2
Figure 23. PSM2 Mode Triggering IRQ1 Pin for LPLINE[4:0] = 2
IRQ1
PHASE
COUNTER = 1
(50 Hz Systems)
PHASE
COUNTER = 2
LPLINE[4:0] = 2
All Registers
Set to default
Set to default
Not available
Not available
Not available
PHASE
COUNTER = 3
1
LPOILVL,
CONFIG2
Set to default
Unchanged
Values set
during PSM0
unchanged
Values set
during PSM0
unchanged
Values set
during PSM0
unchanged
THRESHOLD
LPOIL[2:0]
Rev. D | Page 22 of 96
I
I
Active serial port is unchanged if lock-
in procedure has been previously
executed
Enabled
Disabled
Disabled
2
2
C enabled
C/SPI
this signifies all phase currents stayed below threshold and,
therefore, there is no current flowing through the system.
At this point, the external microprocessor sets the ADE7868/
ADE7878 into Sleep Mode PSM3. If the IRQ1 pin is triggered
low at the end of the measurement period, this signifies that at
least one current input is above the defined threshold and
current is flowing through the system, although no voltage is
present at the ADE7868/ADE7878 pins. This situation is often
called missing neutral and is considered a tampering situation,
at which point the external microprocessor sets the ADE7868/
ADE7878 into PSM1 mode, measures the mean absolute values
of phase currents, and integrates the energy based on their values
and the nominal voltage.
It is recommended to use the ADE7868/ADE7878 in PSM2
mode when Bits[2:0] (PGA1[2:0]) of the gain register are equal
to 1 or 2. These bits represent the gain in the current channel
datapath. It is not recommended to use the ADE7868/ADE7878
in PSM2 mode when the PGA1[2:0] bits are equal to 4, 8, or 16.
PSM3—SLEEP MODE (ALL PARTS)
The sleep mode is available on all parts (ADE7854, ADE7858,
ADE7868, and ADE7878). In this mode, the ADE78xx has most
of its internal circuits turned off and the current consumption is
at its lowest level. The I
tional during this mode, and the RESET , SCLK/SCL, MOSI/SDA,
and SS /HSA pins should be set high.
2
C, HSDC, and SPI ports are not func-
Functionality
All circuits are active and
DSP is in idle mode.
All circuits are active and
DSP is in idle mode.
Current mean absolute
values are computed and
the results are stored in
the AIMAV, BIMAV, and
CIMAV registers. The I
SPI serial port is enabled
with limited functionality.
Compares phase currents
against the threshold set
in LPOILVL. Triggers IRQ0
or IRQ1 pins accordingly.
The serial ports are not
available.
Internal circuits shut down
and the serial ports are
not available.
2
C or