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SA9105APA

THREE PHASE UNIDIRECTIONAL POWER/ENERGY METERING IC WITH PULSE OUTPUT

South African Micro Electronic Systems 

SA9105A

2. Analog Input Configuration

The current and voltage sensor inputs are illustrated below.

These inputs are protected against electrostatic discharge through clamping

diodes, in conjunction with the amplifiers input configuration.

The feedback loops from the outputs of the amplifiers A and A generate virtual

I

V

shorts on the signal inputs. Exact duplications of the input currents are generated

for the analog processing circuitry

VD D

IIP

CURRENT

V SS

SENSOR

AI

INPUTS

V DD

IIN

V SS

V DD

IVP

VOLTAGE

SENSOR

V SS

INPUT

AV

DR-00904

GND

3. Electrostatic Discharge (ESD) Protection

The SA9105A integrated circuit's inputs/outputs are protected against ESD according

to Mil-Std 883 method 3015. The SA9105A integrated circuit's resistance to

transients is also dependant upon the external protection components used.

4. Power Consumption

The overall power consumption rating of the SA9105A integrated circuit is less than

75mW with a 5V supply.

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