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參數(shù)資料
| 型號(hào)： | SA9109B |
| 廠商： | SAMES |
| 元件分類(lèi)： | 電能質(zhì)量分析儀 |
| 英文描述： | MONOCHIP SINGLE PHASE BIDIRECTIONAL KILOWATT HOUR METERING IC |
| 中文描述： | MONOCHIP單相雙向千瓦小時(shí)計(jì)量IC |
| 文件頁(yè)數(shù)： | 14/18頁(yè) |
| 文件大小： | 183K |
| 代理商： | SA9109B |
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SA9109B
14/18
sames
7.
Power Failure/Battery Backup
A battery backup facility is available on VBA. This feature is provided to ensure
retention of the information stored in the registers, in case of power breaks.
The VSS supply to the analog circuitry and digital circuitry of this device has been
separated. In the event of a power failure, the supply to the analog circuitry falls
to 0V. The digital circuitry is switched to a power down mode, to minimise the supply
current from an external battery backup. During this procedure, the following
events take place:
All inputs are disabled
All outputs are placed in high impedance mode
The oscillator is inhibited
The LCD driver is disabled
The contents of the RAM is retained by means of an external power source.
8.
Electrostatic Discharge (ESD) Protection
The SA9109B integrated circuits inputs/outputs are protected against ESD.
Power Consumption
The power consumption rating of the SA9109B integrated circuit is less than 40mW.
9.
TYPICAL APPLICATION
In the Application Circuit (Figure 1), the components required for a single phase power
metering application are shown.
In Figure 1 a shunt resistor is used for current sensing. In the application, the circuitry
requires a +2.5V, 0V, -2.5V DC supply.
The most important external components for the SA9109B integrated circuit are:
C
and C
are the outer loop capacitors for the two integrated oversampling A/D
converters. The value of these capacitors is 560pF.
The actual values determine signal to noise and stability performance. The tolerances
should be within ±10%.
C
and C
are the inner loop capacitors of the A/D converters. The optimum value is
3.3nF. The actual values are uncritical. Values smaller than 0.5nF and larger than 5nF
should be avoided.
R
, R
and RSH are the resistors defining the current level into the current sense input.
The values should be selected for an input current of 16μA
RMS
into the SA9109A, at
maximum line current.
R
1
= R
2
= I
L
* R
SH
16μA
RMS
2
Where
I
L
=
Line current
RSH
=
Shunt resistor
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SA9109BFA | 制造商:SAMES 制造商全稱(chēng):SAMES 功能描述:MONOCHIP SINGLE PHASE BIDIRECTIONAL KILOWATT HOUR METERING IC |
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| SA-9-115 | 功能描述:焊接工作站設(shè)備 Fume Absorber 115V RoHS:否 制造商:OK International 產(chǎn)品:Stands 類(lèi)型:Soldering and Rework System 最大溫度:+ 55 C 電纜類(lèi)型:US Cord Included |
| SA9-115 | 制造商:Jonard Industries / OK Industries 功能描述:FUME EXTRACTOR; Features:Benchtop Mounting; Supply Voltage:115VAC ;RoHS Compliant: NA |
| SA9-120-13 | 功能描述:ANT VPOL SECTOR 13DBI 900MH NFEM RoHS:是 類(lèi)別:RF/IF 和 RFID >> RF 天線 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* |
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