SA9103E
PIN DESCRIPTION
Pin
Designation
Description
20
8
GND
VDD
Ground
Positive Supply Voltage
14
19
1
VSS
Negative Supply Voltage
Analog input for Voltage
Inputs for current sensor
IVP
IIN
2
IIP
11
10
12
13
4
OSC1
OSC2
SOUT
SIN
Connections for crystal or ceramic resonator
(OSC1 = Input ; OSC2 = Output)
Serial Interface Out
Serial Interface In
CPON
CPOP
CPIN
CPIP
CIP
Connections for outer loop capacitors of
A/D converter (Voltage)
5
6
Connections for inner loop capacitors of
A/D converter (Voltage)
7
15
16
17
18
3
Connections for inner loop capacitors of
A/D converter (Current)
CIN
COP
CON
VREF
TP9
Connections for outer loop capacitors of
A/D converter (Current)
Connection for current setting resistor
Test Pin. Connect to VSS
9
FUNCTIONAL DESCRIPTION
The SA9103E 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 of 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 SA9103E integrates the measured
active power consumption into a 22 bit integrator, which is accessable via a serial port
having a RS232 protocol.
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