SA9603C
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sames
SA9603C
PDS039-SA9603C-001
REV. A
19-09-97
FEATURES
s
Performs bidirectional active and
reactive power/energy, frequency and
voltage measurement
s
Meets the IEC 521/1036 Specification
requirements for Class 1 AC Watt hour
meters
s
Protected against ESD
s
Total power consumption rating below
25mW
s
Adaptable to different current sensor
technologies
s
Operates over a wide temperature
range
s
Serial interface having a RS232
protocol
s
Precision voltage reference on-chip
s
Tri-state output to allow parallel
connection of devices
SINGLE PHASE BIDIRECTIONAL POWER/ENERGY
METERING IC WITH SERIAL INTERFACE
7133
Package: DIP-14
1/16
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 -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
PIN CONNECTIONS
(DIP-14/DIP-20), as well as 20 pin small
outline (SOIC-20) package types.
PRELIMINARY
O S C 2
6
O S C 1
DR-01088
7
VR E F
IIP
T E S T
D D
V
IIN
2
5
4
3
1
S IN
9
8
SOUT
IVP
T P 12
S S
FM O
13
V
10
11
12
G N D
14
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Parameter
Symbol
Min
Max
Unit
Supply Voltage
V
DD
-V
SS
-0.3
6.0
V
Current on any pin
I
PIN
-150
+150
mA
Storage Temperature
T
STG
-40
+125
C
Operating Temperature
T
O
-10
+70
C
ABSOLUTE MAXIMUM RATINGS*
* 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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ELECTRICAL CHARACTERISTICS
(V
DD
= 2.5V, V
SS
= -2.5V, over the temperature range -10C to +70C
#
, unless otherwise
specified.)
Parameter
Symbol
Min
Typ
Max
Unit
Condition
Supply Voltage: Positive
V
DD
2.25
2.75
V
Supply Voltage: Negative
V
SS
-2.75
-2.25
V
Supply Current: Positive
I
DD
5
6
mA
Supply Current: Negative
I
SS
5
6
mA
Current Sensor Inputs (Differential)
Input Current Range
I
II
-25
+25
A
Peak value
Voltage Sensor Input (Asymetrical)
Input Current Range
I
IV
-25
+25
A
Peak value
Pin FMO
Output Low Voltage
V
OL
V
SS
+1
V
I
OL
= 5mA
Output High Voltage
V
OH
V
DD
-1
V
I
OH
= -2mA
Pin SIN
Input High Voltage
V
IH
V
DD
-1
V
Input Low Voltage
V
IL
V
SS
+1
V
Pull-up Current
-I
I
50
150
A
V
IN
= V
SS
Pin SOUT
Tri-state
Output Low Voltage
V
OL
V
SS
+1
V
Output High Voltage
V
OH
V
DD
-1
V
Oscillator
Recommended crystal:
TV colour burst crystal f = 3.5795 MHz
Pin VREF
With R = 24k
Ref. Current
-I
R
45
50
55
A
connected to V
SS
Ref. Voltage
V
R
1.1
1.3
V
Referred to V
SS
#
Extended Operating Temperature Range available on request.
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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.
PIN DESCRIPTION
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)
Designation
GND
V
DD
V
SS
IVP
IIN
IIP
OSC1
OSC2
SOUT
SIN
VREF
TEST
FMO
TP4
TP5
TP6
TP9
TP12
TP16
TP17
TP18
20 Pin
20
8
14
19
1
2
11
10
12
13
3
7
15
4
5
6
9
16
17
18
14 Pin
14
5
10
13
1
2
7
6
8
9
3
4
11
12
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