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PDF SA9105AFA Data sheet ( Hoja de datos )
| Número de pieza | SA9105AFA | |
| Descripción | THREE PHASE UNIDIRECTIONAL POWER/ENERGY METERING IC WITH PULSE OUTPUT | |
| Fabricantes | Sames | |
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SA9105A
THREE PHASE UNIDIRECTIONAL POWER/ENERGY
METERING IC WITH PULSE OUTPUT
FEATURES
n Performs unidirectional one, two or n Excellent long term stability
three phase power and energy
measurement
n Easily adaptable to different signal
levels
n
Meets the IEC 521/1036 Specification
requirements for Class 1 AC Watt hour
n
Precision voltage reference on-chip
meters
n Three pulse rate outputs available
n Operates over a wide temperature n Protected against ESD
Range
n Uses current transformers for current
sensing
DESCRIPTION
The SAMES SA9105A Three Phase
unidirectional Power/Energy metering
integrated circuit generates a pulse rate
output, the frequency of which is proportional
to the power consumption. The SA9105A
performs the calculations of active power.
The method of calculation takes the power
factor into account.
Energy consumption is determined by the
power measurement being integrated over
time.
The output of this innovative universal three
phase power/energy metering integrated
circuit, is ideally suited for applications such
as residential and industrial energy metering
and control.
The SA9105A integrated circuit is available
in 40 pin dual-in-line plastic (DIP-40), as
well as in 44 pin plastic leaded chip carrier
(PLCC-44) packages types.
PIN CONNECTIONS
CIN1 1
CIP2 2
CIN2 3
CIP3 4
CIN3 5
IIN1 6
IIP1 7
IIN2 8
IIP2 9
IIN3 10
IIP3 11
COPP 12
CONP 13
CIPP 14
CINP 15
V SS 16
TP17 17
TP18 18
OSC1 19
OSC2 20
40 CIP1
39 COP1
38 CON1
37 CON2
36 COP2
35 GND
34 IVP1
33 IVP2
32 IVP3
31 COP3
30 CON3
29 VREF
28 V DD
27 TP27
26 TP26
25 TP25
24 TP24
23 FOUT3
22 FOUT2
21 FOUT1
DR-00838
Package: DIP-40
4032
PDS039-SA9105A-001 Rev. C
1/12
15-08-1995
1 page  
PIN DESCRIPTION (Continued)
Pin
PLCC
Pin Designation Description
DIP
12 NC Not connected
24 NC
34 NC
44 NC
SA9105A
FUNCTIONAL DESCRIPTION
The SAMES SA9105A is a CMOS mixed signal Analog/Digital integrated circuit, which
performs three phase power/energy calculations over a range of 1000:1, to an overall
accuracy of better than Class 1.
The integrated circuit includes all the required functions for 3-phase power and energy
measurement such as oversampling A/D converters for the voltage and current sense
inputs, power calculation and energy integration. Internal offsets are eliminated through
the use of cancellation procedures.
The SA9105A generates pulses, the frequency of which is proportional to the power
consumption. Three frequency outputs (FOUT1, FOUT2 and FOUT3) are available.
1. Power Calculation
In the Application Circuit (Figure 1), the mains voltages from Line 1, Line 2 and Line
3, are converted to currents and applied to the voltage sense inputs IVP1, IVP2 and
IVP3.
The current levels on the voltage sense inputs are derived from the mains voltage
(3 x 230 VAC) being divided down through voltage dividers to 14V. The resulting
input
currents
into
the
A/D
converters
are
14µA
through
the
resistors
R,
15
R
16
and
R.
17
For the current sense inputs the voltage drop across the current transformers
terminating resistors are converted to currents of 16µA for rated conditions, by
means of resistors R , R (Phase 1); R , R (Phase 2) and R , R (Phase 3).
89
10 11
12 13
The signals providing the current information are applied to the current sensor inputs
IIN1, IIP1; IIN2, IIP2 and IIN3, IIP3.
In this configuration, with the mains voltage of 3 x 230 V and rated currents of 80A,
the output frequency of the SA9105A energy metering integrated circuit at FOUT1
is 1.16kHz. In this case 1 pulse will correspond to an energy consumption of 3 x 18.4
kW/1160Hz = 47.6 Ws.
The output frequency at FOUT2 is FOUT1/4. At FOUT3 the output frequency is
FOUT1/290.
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5 Page 
Parts List for Application Circuit: Figure 1 (Continued)
Item
41
42
Symbol
C12
C13
Description
Capacitor, 820nF
Capacitor, 100nF
43 C14 Capacitor, 100nF
Detail
Note 3
SA9105A
Note 1: Resistor (R , R , R , R , R and R ) values are dependant upon the selected
8 9 10 11 12
13
values of the current transformer termination resistors R18, R19 and R20.
Note 2: Capacitor values may be selected to compensate for phase errors caused by the
current transformers.
Note 3: Capacitor (C12) to be positioned as close to Supply Pins (VDD & VSS) of IC-1, as
possible.
ORDERING INFORMATION
Part Number
Package
SA9105APA
DIP-40
SA9105AFA
PLCC-44
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