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参数资料
| 型号： | CDB5464U |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 39/46页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR CS5464 ADC |
| 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： | CS5464 |
| 主要属性： | 电能表 |
| 次要属性： | 图形用户接口，SPI? 和 USB 接口 |
| 已供物品： | 板，线缆，软件 |
| 产品目录页面： | 754 (CN2011-ZH PDF) |
| 相关产品： | CS5464-ISZR-ND - IC ENERGY METERING 1PHASE 28SSOP 598-1194-5-ND - IC ENERGY METERING 1PHASE 28SSOP 598-1193-5-ND - IC PWR/ENERGY METER 3CH 28-SSOP |
| 其它名称： | 598-1554 CDB-5464U |
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CS5464
9. SYSTEM CALIBRATION
9.1 Calibration
The CS5464 provides DC offset and gain calibration
that can be applied to the voltage and current measure-
External
Connections
ments, and AC offset calibration which can be applied to
the voltage and current RMS calculations.
0V +-
AIN+
+
XGAIN
+
Since the voltage and current channels have indepen-
-
-
dent offset and gain registers, offset and gain calibra-
tion can be performed on any channel independently.
The data flow of the calibration is shown in Figure 10 .
CM +-
AIN-
The CS5464 must be operating in its active state and
ready to accept valid commands. Refer to 7.6 Com-
mands on page 24.
The value in the Cycle Count register ( N ) determines
the number of output word rate (OWR) samples that are
averaged during a calibration. DC offset and gain cali-
brations take at least N + T SETTLE samples. AC offset
calibrations take at least 6( N ) + T SETTLE samples. As N
is increased, the accuracy of calibration results tends to
also increase.
The DRDY bit in the Status register will be set at the
completion of Calibration commands. If an overflow oc-
curs during calibration, other Status register bits may be
set as well.
9.1.1 Offset Calibration
During offset calibrations, no line voltage or current
should be applied to the meter. A zero-volt differential
signal can also be applied to the voltage inputs VIN ? or
current inputs IIN1 ? (IIN ???? of the CS5464.
(see Figure 11 .)
Figure 11. System Calibration of Offset
9.1.1.1 DC Offset Calibration
The DC Offset Calibration command measures and av-
erages DC values read on specified voltage or current
channels at zero input and stores the inverse result in
the associated offset registers. This will be added to in-
stantaneous measurements in subsequent conver-
sions, removing the offset.
Gain registers for channels being calibrated should be
set to 1.0 prior to performing DC offset calibration.
9.1.1.2 AC Offset Calibration
The AC Offset Calibration command measures the re-
sidual RMS values read on specified voltage or current
channels at zero input and stores the inverse result in
the associated AC offset registers. This will be added to
RMS measurements in subsequent conversions, re-
moving the offset.
AC offset registers for channels being calibrated should
first be cleared prior to performing the calibration.
V1, I1, V2, I2
?
In
Modulator
Filter
+
X
X
N
? N
?
+
+
+
RMS
I1 RMS , V1 RMS ,
I2 RMS , V2 RMS
?
I1 DCOFF , V1 DCOFF , I1 GAIN , V1 GAIN ,
I2 DCOFF , V2 DCOFF I2 GAIN , V2 GAIN
N
I1 ACOFF , V1 ACOFF ,
I2 ACOFF , V2 ACOFF
AC Offset
DC Offset AC Gain
DC Gain
1
DC AVG
? N
Negate
DC AVG
Negate
0.6
RMS
= READABLE/WRITABLE REGISTERS.
Figure 10. Calibration Data Flow
DS682F3
39
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CDB5464U-Z | 制造商:Cirrus Logic 功能描述:EVAL BD PB-FREE DEMO BOARD FOR CS5464 - Boxed Product (Development Kits) 制造商:Cirrus Logic 功能描述:Eval Board |
| CDB5466U | 功能描述:数据转换 IC 开发工具 Eval Bd F/Residental Pow-Meter Apps RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| CDB5466U-Z | 制造商:Cirrus Logic 功能描述:PB-FREEEVAL BOARD FOR CS5466 WITH USB - Bulk |
| CDB5467U | 功能描述:数据转换 IC 开发工具 Eval Bd 4-Ch Sngl-Phs Pow/Energy RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| CDB5471 | 制造商:Cirrus Logic 功能描述:Tools Development kit Kit Con |
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