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PDF SA9603C Data sheet ( Hoja de datos )
| Número de pieza | SA9603C | |
| Descripción | SINGLE PHASE BIDIRECTIONAL POWER/ENERGY METERING IC WITH SERIAL INTERFACE | |
| Fabricantes | Sames | |
| Logotipo |  |
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SA9603C
sames
PRELIMINARY
SA9603C
SINGLE PHASE BIDIRECTIONAL POWER/ENERGY
METERING IC WITH SERIAL INTERFACE
FEATURES
s Performs bidirectional active and s Adaptable to different current sensor
reactive power/energy, frequency and
technologies
voltage measurement
s Operates over a wide temperature
s Meets the IEC 521/1036 Specification
range
requirements for Class 1 AC Watt hour
meters
s Serial interface having a RS232
protocol
s Protected against ESD
s Precision voltage reference on-chip
s Total power consumption rating below s Tri-state output to allow parallel
25mW
connection of devices
DESCRIPTION
The SAMES SA9603C bidirectional single
phase power/energy metering integrated
circuit has a serial interface with a RS232
protocol, ideal for use with a µ-Controller.
The SA9603C performs the calculation for
active and reactive power.
The SA9603C is a direct replacement for
the SA9103C with additional features for
the fast reading of all register values.
The integrated values for active and
reactive energy as well as the mains
frequency and voltage information are
accessable through the serial interface as
16 bit values.
This universal single phase power/energy
metering integrated circuit is ideally suited
for energy calculations in applications such
as electricity dispensing systems (ED's),
residential municipal metering and factory
energy metering and control.
The SA9603C integrated circuit is available
in both 14 and 20 pin dual-in-line plastic
7133 sames
(DIP-14/DIP-20), as well as 20 pin small
outline (SOIC-20) package types.
PIN CONNECTIONS
IIN 1
IIP 2
VREF 3
TEST 4
VDD 5
OSC2 6
OSC1 7
DR-01088
14 G N D
13 IVP
12 T P12
11 FM O
10 V SS
9 SIN
8 SOUT
Package: DIP-14
PDS039-SA9603C-001
11//1186
REV. A 19-09-97
1 page  
SA9603C
PIN DESCRIPTION
14 Pin
14
5
10
13
1
2
7
6
8
9
3
4
11
12
20 Pin
20
8
14
19
1
2
11
10
12
13
3
7
15
4
5
6
9
16
17
18
Designation
GND
V
DD
VSS
IVP
IIN
IIP
OSC1
OSC2
SOUT
SIN
VREF
TEST
FMO
TP4
TP5
TP6
TP9
TP12
TP16
TP17
TP18
Description
Ground
Positive Supply Voltage
Negative Supply Voltage
Analog input for mains voltage
Inputs for current sensor
Connections for crystal or ceramic resonator
(OSC1 = Input ; OSC2 = Output)
Serial Interface Out
Serial Interface In
Connection for current setting resistor
Test Pin. Must be connected to VSS
Mains frequency zero-crossing indication
Test Pins (Leave unconnected)
FUNCTIONAL DESCRIPTION
The SA9603C is a CMOS mixed signal Analog/Digital integrated circuit, which performs
power/energy calculations across a power range of 1000:1, to an overall accurancy of
better than Class 1.
The integrated circuit includes all the required functions for 1-phase power and energy
measurement, such as two 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 SA9603C integrates the measured
active and reactive power consumption into 22 bit integrators, which are accessable via
a serial port having a RS232 protocol. Two additional on-chip registers exist: one register
contains the mains frequency information; and the other the voltage information.
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5 Page 
SA9603C
8. Calibration
For calibration of the SA9603C, the following procedure is recommended:
a. Establish the calibration factor for active energy (Ka) at power factor (PF)
close to 1.
Active (Measured) = register_value (Active) * Ka.
1
b. The factor for reactive (Kr) is typically Ka * PI/2.
For higher accuracy of Kr, establish Kr at PF close to 0.
Reactive (Measured) = register_value (Reactive) * Kr
c. At PF close to 1, establish error for reactive (Er)
Er = (Reactive (Measured) - Reactive (True)) / Active (Measured)
2
3
Reactive (Corrected) = Reactive (Measured) - Er * Active (Measured) 3b
Measurement
Having determined the scaling factors (Ka & Kr) and error correction constant (Er)
the measurement cycle consists of the following steps:
Step 1 Read active register
∨
Step 2 Calculate Active (Measured) as per 1
Step 3
Step 4
∨
Read reactive register
∨
Calculate Reactive (Measured) as per 2
∨
Step 5 Perform error correction
Calculate Reactive (Corrected) as per 3b
⇒ Active energy
⇒ Reactive energy
The above five steps must be performed for each measurement cycle.
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