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參數(shù)資料
| 型號(hào)： | AD7755 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Energy Metering IC with Pulse Output(帶脈沖輸出的高精度電子能量測(cè)量芯片) |
| 中文描述： | 電能計(jì)量IC脈沖輸出（帶脈沖輸出的高精度電子能量測(cè)量芯片） |
| 文件頁(yè)數(shù)： | 4/14頁(yè) |
| 文件大?。?/td> | 260K |
| 代理商： | AD7755 |
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AD7755
Terminology
4
PRELIM B2 10/98
MEASUREMENT ERROR
The error associated with the power measurement made by the
AD7755 is defined by the following formula:
Error
Measured Power-Ideal Power
Ideal Power
=
×
100%
PHASE ERROR BETWEEN CHANNELS
The HPF (High Pass Filter) in the channel 1 has a phase lead
response. To offset this phase response and equalize the phase
response between channels a phase correction network is also
placed in channel 1. The phase correction network matches the
phase to within ±0.05° over a range of 45Hz to 65Hz.
POWER SUPPLY REJECTION
AD7755 measurement error as a percentage of reading when
the power supplies are varied.
For the ac PSR measurement a reading at nominal supplies
(5V) is taken. Then a 200mV rms/50Hz signal is introduced
onto the supplies and a second reading obtain under with the
same input signal levels. Any error introduced is expressed as a
percentage of reading—see MEASUREMENT ERROR
definition.
For the dc PSR measurement a reading at nominal supplies
(5V) is taken. Then the supplies are varied ±5% and a second
reading obtain under with the same input signal levels. Any
error introduced is again expressed as a percentage of reading.
ADC OFFSET ERROR
This refers to the dc offset associated with the analog inputs to
the ADCs. It means that with the analog inputs connected to
AGND the ADCs still see an analog input signal of ±10mV.
However when the HPF is switched on the offset is removed
from the current channel and the power calculation is not
affected by this offset.
GAIN ERROR
The gain error of the AD7755 is defined as the difference
between the measured output frequency (minus the offset)
and the ideal output frequency. It is measured with a gain of 1
in channel V1. The difference is expressed as a percentage of
the ideal frequency. The ideal frequency is obtained from the
AD7755 transfer function—see AD7755 Transfer Function
GAIN ERROR MATCH
The Gain Error Match is defined as the gain error (minus the
offset) obtained when switching between a gain of 1 and a gain
of 2, 8, or 16. It is expressed as a percentage of the output
frequency obtained under a gain of 1.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7755AAN | 制造商:Rochester Electronics LLC 功能描述:ENERGY METERING IC WITH P - Bulk |
| AD7755AAN-REF | 制造商:Analog Devices 功能描述: |
| AD7755AARS | 制造商:Rochester Electronics LLC 功能描述:ENERGY METERING IC WITH P - Bulk 制造商:Analog Devices 功能描述: |
| ad7755aarsrl | 制造商:Rochester Electronics LLC 功能描述:ENERGY METERING IC WITH P - Tape and Reel 制造商:Analog Devices 功能描述: |
| AD7755ABRS | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Energy Metering IC with Pulse Output |
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