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參數(shù)資料
| 型號： | SA9109BFA |
| 廠商： | SAMES |
| 元件分類： | 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單相雙向千瓦小時計量IC |
| 文件頁數(shù)： | 15/18頁 |
| 文件大?。?/td> | 183K |
| 代理商： | SA9109BFA |
SA9109B
sames
15/18
R
, R
and R
set the current for the voltage sense input. The values should be selected
so that the input current into the voltage sense input (virtual ground) is set to 14μA
RMS
.
R
defines all on-chip bias and reference currents. With R
= 24k
, optimum conditions
are set. R
may be varied within ±10% for calibration purposes. Any change to R
7
will
affect the energy calculation quadratically.
XTAL is a colour burst TV crystal (f = 3.5795MHz) for the oscillator. The oscillator
frequency is divided down to 1.7897MHz on-chip to supply the digital circuitry and the
A/D converters.
Figure 1: Application Circuit using a Shunt Resistor for Current Sensing.
4
B A T
D 1
D 2
IC - I
SA9109B
2 0
C 4
R 3
C 5
R 4
R SH
SU PPLY
0 V
D R - 0 1 2 5 8
1 9
1 8
1 7
R 2
R 1
R 6
9
1 0
C 1
C 3
1 4
1 3
1 2
1 1
1 6
1 5
7
8
6
5
C 2
-2.5V
LOA D
R 11
R 10
+2.5 V
C 10
0 V
R 7
C 7
C 9
C 6
PG M
PD TA
PC LK
.
.
N EG A T IVE T1 T 2 T 3 T 4 T O T A L
.
.
.
.
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 9
3 7
3 6
3 5
3 4
3 3
3 2
3 0
3 1
3
2
4 1
4 2
1
4 4
4 3
4 0
3 8
3 9
XTA L
.
.
.
.
.
.
.
.
R 9
TA R IFF SELEC T
D ISPLA Y
SELEC T
-2.5V
R 8
R 12
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