SA9602E

sames

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The output on pin FOUT is a pulse density signal representing the instantaneous power/

energy measurement. The minimum timing characteristics are shown in the following

diagram.

TYPICAL APPLICATIONS

In the Application Circuits (Figures 1 and 2), the components required for power metering

applications, are shown.

In Figure 1 a shunt resistor is used for current sensing. In this application, the circuitry

requires a +2.5V, 0V, -2.5V DC supply.

In the case of Figure 2, when using a current transformer for current sensing, a +5V, 0V

DC supply is sufficient.

The most important external components for the SA9602E integrated circuit are:

R

values should be selected for an input current of 16µA

line current.

Values for RSH of less than 200µ

Ω should be avoided.

R

Where

I

L

=

Line current

RSH

=

Shunt resistor/termination resistor

R

so that the input current into the voltage sense input (virtual ground) is set to 14µA

R

are set. R

the output quadratically (i.e.: R

The formula for calculating the output frequency is given below:

f = 11.16 * FOUTX *

FOSC

*

I

3.58MHz

I

R

2

Where FOUTX

= Normal rated frequency (4Hz or 1160Hz)

71us min.

DR-01151

71us