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ADE8052Z-EMUL1 データシート(PDF) 61 Page - Analog Devices

部品番号 ADE8052Z-EMUL1
部品情報  Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver
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ADE8052Z-EMUL1 データシート(HTML) 61 Page - Analog Devices

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ADE7566/ADE7569/ADE7166/ADE7169
Rev. A | Page 61 of 144
Figure 66 shows this energy accumulation for full-scale signals
(sinusoidal) on the analog inputs. The three displayed curves
illustrate the minimum period of time it takes the energy register
to roll over when the active power gain register contents are
0x7FF, 0x000, and 0x800. The watt gain register is used to carry
out power calibration in the ADE7566/ADE7569/ADE7166/
ADE7169. As shown, the fastest integration time occurs when
the watt gain register is set to maximum full scale, that is,
0x7FF.
When WDIV is set to a value other than 0, the integration time
varies, as shown in Equation 17.
Time
= TimeWDIV = 0 × WDIV
(17)
Active Energy Accumulation Modes
Watt Signed Accumulation Mode
The ADE7566/ADE7569/ADE7166/ADE7169 active energy
default accumulation mode is a watt-signed accumulation based
on the active power information.
0x00,0000
0x7F,FFFF
0x3F,FFFF
0x40,0000
0x80,0000
WATTHR[23:0]
6.82
3.41
10.2
13.7
TIME (Minutes)
WGAIN = 0x7FF
WGAIN = 0x000
WGAIN = 0x800
Watt Positive-Only Accumulation Mode
The ADE7566/ADE7569/ADE7166/ADE7169 are placed in
watt positive-only accumulation mode by setting the POAM bit
in the ACCMODE register (0x0F). In this mode, the energy
accumulation is only done for positive power, ignoring any
occurrence of negative power above or below the no-load
threshold (see Figure 67). The CF pulse also reflects this
accumulation method when in this mode. The default setting
for this mode is off. Detection of the transitions in the direction
of power flow and detection of no-load threshold are active in
this mode.
POS
POS
INTERRUPT STATUS REGISTERS
NEG
APSIGN FLAG
NO-LOAD
THRESHOLD
ACTIVE POWER
NO-LOAD
THRESHOLD
ACTIVE ENERGY
Figure 66. Energy Register Rollover Time for Full-Scale Power
(Minimum and Maximum Power Gain)
Note that the energy register contents roll over to full-scale
negative (0x800000) and continue to increase in value when the
power or energy flow is positive (see Figure 66). Conversely, if
the power is negative, the energy register underflows to full-
scale positive (0x7FFFFF) and continues to decrease in value.
By using the interrupt enable register, the ADE7566/ADE7569/
ADE7166/ADE7169can be configured to issue an ADE
interrupt to the 8052 core when the active energy register is half
full (positive or negative) or when an overflow or underflow
occurs.
Integration Time Under Steady Load: Active Energy
As mentioned in the Active Energy Calculation section, 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 WGAIN register set to 0x000, the average
word value from each LPF2 is 0xCCCCD (see
Figure 67. Energy Accumulation in Positive-Only Accumulation Mode
Watt Absolute Accumulation Mode
The ADE7566/ADE7569/ADE7166/ADE7169 are placed in
watt-absolute accumulation mode by setting the ABSAM bit in
the ACCMODE register (0x0F). In this mode, the energy
accumulation is done using the absolute active power, ignoring
any occurrence of power below the no-load threshold (see
Figure 63). The
maximum positive value that can be stored in the internal 49-
bit register is 248 (or 0xFFFF,FFFF,FFFF) before it overflows. The
integration time under these conditions when WDIV = 0 is
calculated in the following equation:
Figure 68). The CF pulse also reflects this accumulation method
when in this mode. The default setting for this mode is off.
Detection of the transitions in the direction of power flow, and
detection of no-load threshold are active in this mode.
Time
=
min
82
.
6
sec
6
.
409
s
22
.
1
xCCCCD
0
FFFF
FFFF,
xFFFF,
0
=
=
μ
×
(16)


同様の部品番号 - ADE8052Z-EMUL1

メーカー部品番号データシート部品情報
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