SA9603C
PIN DESCRIPTION
14 Pin
20 Pin
20
8
Description
Designation
GND
VDD
14
5
Ground
Positive Supply Voltage
Negative Supply Voltage
Analog input for mains voltage
Inputs for current sensor
10
13
1
14
19
1
VSS
IVP
IIN
2
2
IIP
7
11
10
12
13
3
Connections for crystal or ceramic resonator
(OSC1 = Input ; OSC2 = Output)
Serial Interface Out
OSC1
OSC2
SOUT
SIN
6
8
9
Serial Interface In
3
Connection for current setting resistor
Test Pin. Must be connected to VSS
Mains frequency zero-crossing indication
Test Pins (Leave unconnected)
VREF
TEST
FMO
TP4
4
7
11
15
4
5
TP5
6
TP6
9
TP9
12
TP12
TP16
TP17
TP18
16
17
18
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
aserialporthavingaRS232protocol. Twoadditionalon-chipregistersexist: oneregister
contains the mains frequency information; and the other the voltage information.
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