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SA9106A

SINGLE PHASE WATT MEASUREMENT IC WITH INTEGRATED 5 DIGIT LED DISPLAY DRIVER

South African Micro Electronic Systems 

SA9106A

a

f

b

.g .

e

c

d

h

DR-00237

3. Analog Input Configuration

The input circuitry of the current and voltage sensor inputs are illustrated below.

These inputs are protected against electrostatic discharge through clamping

diodes.

The feedback loops from the outputs of the amplifiers AI and AV generate virtual

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

for the analog signal processing circuitry.

V DD

IIP

CURRENT

V SS

SENSOR

AI

INPUTS

V DD

IIN

V SS

V DD

IVP

VOLTAGE

SENSOR

V SS

INPUT

AV

6/14

DR-00505

GND

sames

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