SA9603C
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PRELIMINARY
SA9603C
SINGLE PHASE BIDIRECTIONAL POWER/ENERGY
METERING IC WITH SERIAL INTERFACE
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FEATURES
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Performs bidirectional active and
reactive power/energy, frequency and
voltage measurement
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Meets the IEC 521/1036 Specification
requirements for Class 1 AC Watt hour
meters
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Adaptable to different current sensor
technologies
Operates over a wide temperature
range
Serial interface having a RS232
protocol
Precision voltage reference on-chip
Tri-state output to allow parallel
connection of devices
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Protected against ESD
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Total power consumption rating below
25mW
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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
(DIP-14/DIP-20), as well as 20 pin small
outline (SOIC-20) package types.
PIN CONNECTIONS
IIN
IIP
VR EF
T EST
VDD
OSC2
OSC1
1
2
3
4
5
6
7
14
13
12
11
10
9
8
GND
IVP
T P12
FM O
V SS
SIN
SOUT
DR-01088
Package: DIP-14
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PDS039-SA9603C-001
REV. A 19-09-97
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SA9603C
ABSOLUTE MAXIMUM RATINGS*
Parameter
Supply Voltage
Current on any pin
Storage Temperature
Operating Temperature
Symbol
V
DD
-V
SS
I
PIN
T
STG
T
O
Min
-0.3
-150
-40
-10
Max
6.0
+150
+125
+70
Unit
V
mA
°C
°C
* Stresses above those listed under “Absolute Maximum Ratings” may cause permanent
damage to the device. This is a stress rating only. Functional operation of the device
at these or any other condition above those indicated in the operational sections of this
specification, is not implied. Exposure to Absolute Maximum Ratings for extended
periods may affect device reliability.
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SA9603C
ELECTRICAL CHARACTERISTICS
(V
DD
= 2.5V, V
SS
= -2.5V, over the temperature range -10°C to +70°C
#
, unless otherwise
specified.)
Parameter
Supply Voltage: Positive
Supply Voltage: Negative
Supply Current: Positive
Supply Current: Negative
Symbol Min
V
DD
V
SS
I
DD
I
SS
2.25
-2.75
5
5
Typ
Max
2.75
-2.25
6
6
Unit Condition
V
V
mA
mA
Current Sensor Inputs (Differential)
Input Current Range
I
II
-25
+25
µA
Peak value
Voltage Sensor Input (Asymetrical)
Input Current Range
Pin FMO
Output Low Voltage
Output High Voltage
Pin SIN
Input High Voltage
Input Low Voltage
Pull-up Current
Pin SOUT
Output Low Voltage
Output High Voltage
Oscillator
Pin VREF
Ref. Current
Ref. Voltage
#
I
IV
V
OL
V
OH
V
IH
V
IL
-I
I
-25
+25
V
SS
+1
µA
V
V
V
V
µA
Peak value
I
OL
= 5mA
I
OH
= -2mA
V
DD
-1
V
DD
-1
50
V
SS
+1
150
V
IN
= V
SS
Tri-state
V
OL
V
OH
V
DD
-1
V
SS
+1
V
V
Recommended crystal:
TV colour burst crystal f = 3.5795 MHz
-I
R
V
R
45
1.1
50
55
1.3
µA
V
With R = 24kΩ
connected to V
SS
Referred to V
SS
Extended Operating Temperature Range available on request.
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SA9603C
PIN DESCRIPTION
14 Pin
14
5
10
13
1
2
7
6
8
9
3
4
11
20 Pin
20
8
14
19
1
2
11
10
12
13
3
7
15
4
5
6
9
12
16
17
18
Designation
GND
V
DD
V
SS
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 V
SS
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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