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参数资料
| 型号： | CS5467-ISZR |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 16/46页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 1PHASE 28SSOP |
| 标准包装： | 1,000 |
| 输入阻抗： | 30 千欧 |
| 测量误差： | 0.1% |
| 电压 - 高输入/输出： | 0.8V |
| 电压 - 低输入/输出： | 0.2V |
| 电流 - 电源： | 3.5mA |
| 电源电压： | 4.75 V ~ 5.25 V |
| 测量仪表类型： | 单相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
| 配用： | 598-1555-ND - BOARD EVAL FOR CS5467 ADC |
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CS5467
V1 ACOFF
(V2 ACOFF )
P1 OFF (P2 OFF )
I1 ACOFF
(I2 ACOFF )
Figure 5. Low-rate Calculations
4.8 Power and Energy Results
The instantaneous voltage and current samples are
S 2 – P Active
Q WB =
P Active
multiplied to obtain the instantaneous power ( P1 , P2 )
(see Figure 3 and 4 ). The product is then averaged over
N conversions to compute active power ( P1 AVG ,
P2 AVG ).
Apparent power ( S1 , S2 ) is the product of RMS voltage
and current as shown:
S = V RMS ? I RMS
Power factor ( PF1 , PF2 ) is active power divided by ap-
parent power as shown below. The sign of the power
factor is determined by the active power.
PF = ------------------
S
Wideband reactive power ( Q1 WB , Q2 WB ) is calculated
by doing a vector subtraction of active power from ap-
parent power.
P1 AVG
2
Quadrature power ( Q1 , Q2 ) are sample rate results ob-
tained by multiplying instantaneous current ( I1 , I2 ) by in-
stantaneous quadrature voltage ( V1Q , V2Q ) which are
created by phase shifting instantaneous voltage ( V1 ,
V2 ) 90 degrees using first-order integrators. (See Fig-
related to line frequency, so their gain is corrected by
the Epsilon register, which is based on line frequency.
Reactive power ( Q1 Avg , Q2 AvG ) is generated by inte-
grating the instantaneous quadrature power over N
samples.
Active power ( P1 AVG , P2 AVG ), apparent power ( S1 , S2 ),
and reactive power ( Q1 AVG , Q2 AVG ) of the two channels
are summed up and then divided by 2. The calculation
results are placed in E PULSE , S PULSE , and Q PULSE reg-
isters which can be configured to drive energy pulse
outputs. (See Figure 6 .)
OVF=
+
÷2
E PULSE
×
+
E ACCM
P2 AVG
S1
OVF=
+
÷2
S PULSE
×
+
S ACCM
S2
Q1 AVG
OVF=
+
÷2
Q PULSE
×
+
Q ACCM
Q2 AVG
PulseRate
( E1, E2, E3 )
Figure 6. Two-channel Power Summation
16
DS714F3
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