SA9603C

sames

5/18

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

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