参数资料
型号: CS5467-ISZR
厂商: Cirrus Logic Inc
文件页数: 15/46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
CS5467
4.4 DC Offset and Gain Correction
The system and chip inherently have gain and offset er-
rors which can be removed using the gain and offset
40). Each measurement channel has its own registers.
For every channel, the output of the IIR filter is added to
the offset register and multiplied by the gain register.
4.5 High-pass Filters
Optional high-pass filters (HPF in Figures 3 and 4 ) re-
move any DC from the selected signal paths. Subse-
quently, DC will also be removed from power, and all
low-rate results. (see Figures 5 ).
Each energy channel has a current and voltage path. If
an HPF is enabled in only one path, a phase-matching
filter (PMF) is applied to the other path which matches
the amplitude and phase delay of the HPF in the band
DS714F3
of interest, but passes DC. For more information, see
6.5 High-pass Filters on page 20. The HPF filter multi-
plexers drive the I1 , V1 , I2 , and V2 result registers.
4.6 Low-Rate Calculations
Low-rate results are derived from sample-rate results
integrated over N samples, where N is the value stored
in the Cycle Count register. The low-rate interval is the
sample interval multiplied by N .
4.7 RMS Results
The root mean square ( RMS in Figure 5 ) calculations
are performed on N instantaneous voltage and current
samples, using the formula:
N – 1
? I n 2
I RMS = n = 0
---------------------
N
15
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