Odp: Leading guestions+1

["Marek" <elemark@priv4.onet.pl>]

All informations about lambda interface you can find on National
Semiconductors site .They have special chip for lambda sensors LM9040.
Marek

> The interface chip is supposed to have a gain of 4.5.  This amplified
> output goes to the "5 volt" ADC chip.  Assuming the ADC uses 0 & 5.0
> volts as its reference range, the O2 sensor can usefully range from 0 to
> 1.11 volts.  If the ADC references to 5.12 volts, the O2 can go as high
> as 1.14 volts.  (The spec defines full scale to be an input of 1 volt,
> with the output to the ADC at 4.5 volts.)
>
> The interface chip is tested to handle input voltages from -1 to +1
> volts.  It is designed to handle -3 to +1 volts.  And it lets the smoke
> out beyond -3 and +16 volts.


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