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| 型号： | CRD5463PM-Z |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 38/46页 |
| 文件大小： | 0K |
| 描述： | REFERENCE DESIGN FOR POWER METER |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电度表/功率表 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | CS5463 |
| 主要属性： | 单相功率表 |
| 次要属性： | 90 ~ 260 VAC |
| 已供物品： | 模块，适配器，线缆，电源线 |
| 其它名称： | 598-1943 |
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CS5463
each instantaneous measurement to nullify the DC
component present in the system during conversion
commands.
7.1.2.2 AC Offset Calibration Sequence
Corresponding offset registers I ACoff and/or V ACoff
should be cleared prior to initiating AC offset calibra-
tions. Initiate an AC offset calibration.The AC offset reg-
A typical rms calibration value which allows for reason-
able over-range margin would be 0.6 or 60% of the volt-
age and current channel’s maximum input voltage level.
Two examples of AC gain calibration and the updated
digital output codes of the channel’s instantaneous data
registers are shown in Figures 15 and 16. Figure 16
Before AC Gain Calibration (Vgn Register = 1)
isters are updated with an offset value that reflects the
250 mV
0.9999...
RMS output level. Upon completion of the AC offset cal-
Sinewave
230 mV
0.92
ibration the AC offset is stored in the corresponding AC
offset register. The AC offset register value is subtract-
INPUT
SIGNAL
0V
Instantaneous Voltage
Register Values
ed from each successive V RMS and I RMS calculation.
-230 mV
-250 mV
-0.92
-1.0000...
7.1.3 Gain Calibration Sequence
When performing gain calibrations, a reference signal
should be applied to the VIN ? pins of the voltage and
IIN ? pins of the current channels that represents the de-
sired maximum signal level. Figure 14 shows the basic
V RMS Register = 230 / ?? x 1 / 250 ?? 0.65054
After AC Gain Calibration (Vgn Register changed to approx. 0.9223)
250 mV 0.92231
setup for gain calibration.
Sinewave
230 mV
0.84853
External
INPUT
SIGNAL
0V
Instantaneous Voltage
Register Values
Connections
-230 mV
-0.84853
-
R eference
Signal
+
IN+
+
XG AIN
+
-250 mV
V RMS Register = ? 0.600000
-0.92231
-
CM
+
IN-
-
-
Figure 15. Example of AC Gain Calibration
Before AC Gain Calibration (Vgain Register = 1)
Figure 14. System Calibration of Gain.
250 mV
230 mV
0.9999...
0.92
For gain calibrations, there is an absolute limit on the
RMS voltage levels that are selected for the gain cali-
DC Signal
INPUT
SIGNAL
0V
Instantaneous Voltage
Register Values
bration input signals. The maximum value that the gain
V RMS Register = 250 = ? 0.92
registers can attain is 4. Therefore, if the signal level of
the applied input is low enough that it causes the
-250 mV
230
-1.0000...
CS5463 to attempt to set either gain register higher than
4, the gain calibration result will be invalid and all
CS5463 results obtained while performing measure-
ments will be invalid.
After AC Gain Calibration (Vgain Register changed to approx. 0.65217)
If the channel gain registers are initially set to a gain oth-
250 mV
230 mV
0.65217
0.6000
er then 1.0, AC gain calibration should be used.
7.1.3.1 AC Gain Calibration Sequence
DC Signal
INPUT
SIGNAL
0V
Instantaneous Voltage
Register Values
The corresponding gain register should be set to 1.0,
-250 mV
-0.65217
unless a different initial gain value is desired. Initiate an
AC gain calibration. The AC gain calibration algorithm
computes the RMS value of the reference signal applied
to the channel inputs. The RMS register value is then di-
vided into 0.6 and the quotient is stored in the corre-
sponding gain register. Each instantaneous
measurement will be multiplied by its corresponding AC
gain value.
38
V RMS Register = ? 0.600000
Figure 16. Example of AC Gain Calibration
shows that a positive (or negative) DC-level signal can
be used even though an AC gain calibration is being ex-
ecuted.
DS678F3
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| CRD5490-Z | 功能描述:电源管理IC开发工具 CS5463 Pwr Meas/Mntr Reference Design RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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| CRD5AS-12B-T13B00 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:Reverse Conducting Thyristor Medium Power Use |
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