ADE7566ASTZF8 Analog Devices Inc, ADE7566ASTZF8 Datasheet - Page 58

• Manufacturer Part Number: ADE7566ASTZF8
• Description: IC ENERGY METER MCU 8K 64LQFP
• Manufacturer: Analog Devices Inc

Specifications of ADE7566ASTZF8

• Applications: Energy Measurement
• Core Processor: 8052
• Program Memory Type: FLASH (8 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

ADE7566/ADE7569
Integration Time Under Steady Load
As mentioned in the Active Energy Calculation, the discrete
time sample period (T) for the accumulation register is 1.22 μs
(5/CLKIN). With full-scale sinusoidal signals on the analog
inputs and the VARGAIN and VARDIV registers set to 0x000,
the integration time before the reactive energy register
overflows is calculated in Equation 26.
When VARDIV is set to a value different from 0, the integration
time varies, as shown in Equation 27.
Reactive Energy Accumulation Modes
VAR Signed Accumulation Mode
The ADE7569 reactive energy default accumulation mode is a
signed accumulation based on the reactive power information.
VAR Anti-Tamper Accumulation Mode
The ADE7569 is placed in VAR anti-tamper accumulation mode
by setting the SAVARM bit in the ACCMODE Register (0x0F). In
this mode, the reactive power is accumulated depending on the
sign of the active power. When active power is positive, the
reactive power is added as it is to the reactive energy register.
When active power is negative, the reactive power is subtracted
from the reactive energy accumulator (see Figure 59). The CF
pulse also reflects this accumulation method when in this
mode. The default setting for this mode is off. Transitions in the
direction of power flow and no-load threshold are active in this
mode.
Time =
Time
0xFFFF,
0xCCCCD
=
Time
FFFF,
WDIV
FFFF
= 0
×
×
VARDIV
. 1
22
μ
s
=
409
6 .
sec
=
. 6
82
min
Rev. PrA | Page 58 of 136
(26)
(27)
REACTIVE ENERGY
REACTIVE POWER
ACTIVE POWER
APSIGN FLAG
THRESHOLD
THRESHOLD
THRESHOLD
THRESHOLD
NO-LOAD
NO-LOAD
NO-LOAD
NO-LOAD
Figure 59. Reactive Energy Accumulation in
Anti-Tamper Accumulation Mode
Preliminary Technical Data
INTERRUPT STATUS REGISTERS
POS
NEG
POS