参数资料
型号: ADE7878ACPZ
厂商: Analog Devices Inc
文件页数: 32/100页
文件大小: 0K
描述: IC ENERGY METERING 3PH 40LFCSP
标准包装: 1
输入阻抗: 400 千欧
测量误差: 0.2%
电压 - 高输入/输出: 2.4V
电压 - 低输入/输出: 0.4V
电源电压: 2.4 V ~ 3.7 V
测量仪表类型: 3 相
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 40-WFQFN 裸露焊盘,CSP
供应商设备封装: 40-LFCSP-WQ(6x6)
包装: 托盘
ADE7854/ADE7858/ADE7868/ADE7878
–15
–20
–25
Data Sheet
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 ADE7854 /
–30
30
35
40
45 50 55
FREQUENCY (Hz)
60
65
70
ADE7858 / ADE7868 / ADE7878 can be used directly with a
conventional current sensor, such as a current transformer (CT).
–89.96
–89.97
–89.98
VOLTAGE CHANNEL ADC
Figure 41 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
–89.99
30
35
40
45
50
55
60
65
70
twos complement 24-bit words and are available at a rate of
8 kSPS. With the specified full-scale analog input signal of
FREQUENCY (Hz)
Figure 40. 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 ADE7854 / ADE7858 / ADE7868 / ADE7878 work
±0.5 V, the ADC produces its maximum output code value.
Figure 41 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).
on 32-, 16-, or 8-bit words. Similar to the registers shown in
Figure 35, the DICOEFF 24-bit signed register is accessed as a
VOLTAGE PEAK,
OVERVOLTAGE,
SAG DETECT
DSP
CURRENT RMS (VRMS)
VAP
V IN
PGA3 BITS
GAIN[8:6]
×1, ×2, ×4, ×8, ×16
PGA3
REFERENCE
ADC
HPFDIS
[23:0]
HPF
AVGAIN[23:0]
CALCULATION
VAWV WAVEFORM
SAMPLE REGISTER
TOTAL/FUNDAMENTAL
ACTIVE AND REACTIVE
POWER CALCULATION
VN
V IN
+0.5V/GAIN
0x5A7540 =
VOLTAGE CHANNEL
DATA RANGE
LPF1
ZX DETECTION
+5,928,256
ZX SIGNAL
DATA RANGE
0V
–0.5V/GAIN
0V
0xA58AC0 =
0x5A7540 =
+5,928,256
ANALOG INPUT RANGE
–5,928,256
ANALOG OUTPUT RANGE
0V
0xA58AC0 =
–5,928,256
Figure 41. Voltage Channel Datapath
Rev. H | Page 32 of 100
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