參數(shù)資料
型號： ADE7878ACPZ-RL
廠商： ANALOG DEVICES INC
元件分類： 模擬信號調(diào)理
英文描述： Poly Phase Multifunction Energy Metering IC With Total And Fundamental Powers, No Of Pins: 40, Temperature Range: Ind
中文描述： SPECIALTY ANALOG CIRCUIT, QCC40
封裝： 6 X 6 MM, ROHS COMPLIANT, MO-220WJJD, LFCSP-40
文件頁數(shù)： 24/96頁
文件大小： 1096K
代理商： ADE7878ACPZ-RL
ADE7854/ADE7858/ADE7868/ADE7878
Rev. E | Page 30 of 96
–30
–15
–20
–25
–89.96
–89.97
–89.98
–89.99
MA
G
N
IT
U
D
E
(d
B
)
PH
A
SE
(
D
eg
re
es
)
30
35
40
45
50
55
60
65
70
FREQUENCY (Hz)
30
35
40
45
50
55
60
65
70
FREQUENCY (Hz)
0
85
10
-1
01
Figure 38. Combined Gain and Phase Response of the
Digital Integrator (40 Hz to 70 Hz)
As stated in the Current Waveform Gain Registers section, the
serial ports of the ADE78xx work on 32-, 16-, or 8-bit words.
Similar to the registers shown in Figure 33, the DICOEFF 24-bit
signed register is accessed as a 32-bit register with four MSBs
padded with 0s and sign extended to 28 bits, which practically
means it is transmitted equal to 0xFFF8000.
When the digital integrator is switched off, the ADE78xx can
be used directly with a conventional current sensor, such as
a current transformer (CT).
VOLTAGE CHANNEL ADC
Figure 39 shows the ADC and signal processing chain for
Input VA in the voltage channel. The VB and VC channels
have similar processing chains. The ADC outputs are signed
twos complement 24-bit words and are available at a rate of
8 kSPS. With the specified full-scale analog input signal of
±0.5 V, the ADC produces its maximum output code value.
Figure 39 shows a full-scale voltage signal being applied to the
differential inputs (VA and VN). The ADC output swings
between 5,928,256 (0xA58AC0) and +5,928,256 (0x5A7540).
AVGAIN[23:0]
REFERENCE
HPFDIS
[23:0]
DSP
TOTAL/FUNDAMENTAL
ACTIVE AND REACTIVE
POWER CALCULATION
VOLTAGE PEAK,
OVERVOLTAGE,
SAG DETECT
VAWV WAVEFORM
SAMPLE REGISTER
CURRENT RMS (VRMS)
CALCULATION
HPF
ADC
PGA3
VAP
ZX DETECTION
PGA3 BITS
GAIN[8:6]
×1, ×2, ×4, ×8, ×16
VIN
VN
ANALOG INPUT RANGE
ANALOG OUTPUT RANGE
0x5A7540 =
+5,928,256
ZX SIGNAL
DATA RANGE
0V
0xA58AC0 =
–5,928,256
0x5A7540 =
+5,928,256
VOLTAGE CHANNEL
DATA RANGE
0V
0xA58AC0 =
–5,928,256
+0.5V/GAIN
–0.5V/GAIN
0V
LPF1
08
51
0-
0
25
Figure 39. Voltage Channel Datapath
相關(guān)PDF資料
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