ADE7566ASTZF16 Analog Devices Inc, ADE7566ASTZF16 Datasheet - Page 35
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ADE7566ASTZF16
Manufacturer Part Number
ADE7566ASTZF16
Description
IC ENERGY METER 1PHASE 64-LQFP
Manufacturer
Analog Devices Inc
Specifications of ADE7566ASTZF16
Applications
Energy Measurement
Core Processor
8052
Program Memory Type
FLASH (16 kB)
Controller Series
ADE75xx
Ram Size
512 x 8
Interface
I²C, SPI, UART
Number Of I /o
20
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
64-LQFP
Ic Function
Single Phase Energy Measurement IC
Supply Voltage Range
3.13V To 3.46V, 2.4V To 3.7V
Operating Temperature Range
-40°C To +85°C
Digital Ic Case Style
LQFP
No. Of Pins
64
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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USING THE POWER SUPPLY FEATURES
In an energy meter application, the 3.3 V power supply (V
typically generated from the ac line voltage and regulated to 3.3 V
by a voltage regulator IC. The preregulated dc voltage, typically
5 V to 12 V, can be connected to V
A 3.6 V battery can be connected to V
the ADE7116/ADE7156/ADE7166/ADE7169/ADE7566/
ADE7569 power supply inputs are set up in this application.
Figure 35 shows the sequence of events that occurs if the main
power supply generated by the PSU starts to fail in the power
meter application shown in Figure 34. The SAG detection can
provide the earliest warning of a potential problem on V
SAG LEVEL TRIP POINT
(240V, 220V, 110V TYPICAL)
SAGCYC = 1
AC INPUT
Figure 35. Power Supply Management Interrupts and Battery Switchover with Only V
V
P
2.75V
V
– V
1.2V
DCIN
V
DD
N
PSU
5V TO 12V DC
DCIN
through a resistor divider.
BAT
. Figure 34 shows how
Figure 34. Power Supply Management for Energy Meter Application
REGULATOR
ADE7116/ADE7156/ADE7166/ADE7169/ADE7566/ADE7569
3.3V
V
BCTRL
DD
SWOUT
V
DD
V
SAG EVENT
.
BAT
(FSAG = 1)
DCIN
V
) is
V
Rev. B | Page 35 of 152
V
DD
N
P
64
45
49
50
60
61
58
DETECTION
SAG
When a SAG event occurs, user code can be configured to back up
data and prepare for battery switchover if desired. The relative
spacing of these interrupts depends on the design of the power
supply.
Figure 36 shows the sequence of events that occurs if the main
power supply starts to fail in the power meter application shown
in Figure 34, with battery switchover on low V
enabled.
Finally, the transition between V
power supply modes (see the Operating Modes section) are
represented in Figure 37 and Figure 38.
SUPERVISORY
SUPERVISORY
VOLTAGE
VOLTAGE
V
(FVDCIN = 1)
DCIN
EVENT
t
1
DD
POWER SUPPLY
MANAGEMENT
IF SWITCHOVER ON LOW V
Enabled for Battery Switchover
OCCURS. V
t
2
AUTOMATIC BATTERY SWITCHOVER
SWOUT
BSO EVENT
(FBSO = 1)
V
DD
IS CONNECTED TO V
SW
and V
(ADDR. 0xF8)
IPSMF SFR
DD
BAT
IS ENABLED,
and the different
DCIN
BAT
or low V
.
DD