SA9105A

sames

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The formula for calculating the Output Frequency (f) is given below:

f = 11.16 * FOUTX *

FOSC

*

(I

3.58MHz

3 * I

R

2

Where FOUTX

= Nominal rated frequency (4Hz, 290Hz or 1160Hz)

FOSC

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

I

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

I

= Input currents for voltage inputs (14µA at rated)

I

R

= Reference current (typically 50µA)

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

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

A/D converters.