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SA9605ASA

THREE PHASE POWER/ENERGY METERING IC WITH INSTANTANEOUS PULSE OUTPUT

South African Micro Electronic Systems 

SA9605A

PIN DESCRIPTION

Pin Designation

Description

16

GND Ground

6

VDD

Positive Supply Voltage

14

V

Negative Suply Voltage

SS

17

IVN1 Analog input for Voltage : Phase 1

20

IVN2 Analog input for Voltage : Phase 2

3

IVN3 Analog input for Voltage : Phase 3

19

IIN1 Inputs for Current sensor : Phase 1

18

IIP1

2

IIN2 Inputs for Current sensor : Phase 2

1

IIP2

5

IIN3 Inputs for Current sensor : Phase 3

4

IIP3

10

OSC1 Connections for crystal or ceramic resonator

11

OSC2 (OSC1 = Input ; OSC2 = Output)

7

FOUT1 Pulse rate outputs

8

FOUT2

9

DIR Direction indicator

12

PGM0 FOUT2 Frequency select pins

13

PGM1

15

VREF Connection for current setting resistor

FUNCTIONAL DESCRIPTION

The SAMES SA9605A is a CMOS mixed signal Analog/Digital integrated circuit, which

performs three phase power/energy calculations over a range of 1000:1, to an overall

accuracy of better than Class 1.

The SA9605A in both DIP-20 and SOIC-20 package options is functionally similar to the

SA9105E and SA9105F with the advantage of no external loop capacitors.

The integrated circuit includes all the required functions for 3-phase power and energy

measurement such as 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 SA9605A generates pulses, the frequency of which is proportional to the power

consumption. Two frequency outputs (FOUT1 and FOUT2) are available. The pulse rate

follows the instantaneous power measured.

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