SA9103C

sames

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PIN DESCRIPTION

Pin

Designation

Description

20

GND

Ground

8

V

DD

Positive Supply Voltage

14

V

SS

Negative Supply Voltage

19

IVP

Analog input for Voltage

1

IIN

Inputs for current sensor

2

IIP

11

OSC1

Connections for crystal or ceramic resonator

10

OSC2

(OSC1 = Input ; OSC2 = Output)

12

SOUT

Serial Interface Out

13

SIN

Serial Interface In

4

CPON

Connections for outer loop capacitors of

5

CPOP

A/D converter (Voltage)

6

CPIN

Connections for inner loop capacitors of

7

CPIP

A/D converter (Voltage)

15

CIP

Connections for inner loop capacitors of

16

CIN

A/D converter (Current)

17

COP

Connections for outer loop capacitors of

18

CON

A/D converter (Current)

3

VREF

Connection for current setting resistor

9

TP9

Test Pin. Must be connected to V

SS

FUNCTIONAL DESCRIPTION

The SA9103C 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 SA9103C 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.