SA9102C Ver la hoja de datos (PDF) - South African Micro Electronic Systems

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SA9102C

SINGLE PHASE UNIDIRECTIONAL POWER/ENERGY METERING IC PULSE OUTPUT

South African Micro Electronic Systems 

SA9102C

The formula for calculating the output frequency (f) is given below:

f = 11.16 * FOUTX *

FOSC

I .I

*I V

3.58MHz

I2

R

Where FOUTX = Nominall rated frequency (4Hz or 1160Hz)

FOSC = Oscillator frequency (2MHz ...... 4MHz)

II

= Input currents for current input (16µA at rated)

IV

= Input current for voltage input (14µA at rated)

IR

= Reference current (typically 50µA)

XTAL is a colour burst TV crystal (f = 3.5795MHz) for the oscillator. The oscillator

frequency is divided down to 1.7897MHz on-chip to supply the digital circuitry and the

A/D converters.

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