Data Sheet

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Keep in mind that every time you are reading the data out of the LCD2309 IC you are actually

getting the previous conversion result. This may not be an issue when running a conversion loop

for a single ADC channel. You will have to ignore the rst result in these cases:

Discard the rst ADC result after the channel change. Only the second measurement will bring

you the conversion data for the newly selected channel.

Do the conversion twice and discard the rst result when performing sporadic measurements.

This way you will obtain the "current" data.

The LTC2309 ADC IC has a 12-bit resolution. The Tibbit #13 has the eective resolution of around

9~10 bits. This reduction is caused by the system noise and other factors that aect the

measurement quality.

Combine this Tibbit with #20 (nine terminal blocks) or #19 (DB9M connector). It's not common but

possible to use the latter for wiring into the ADC inputs. The Tibbit #21 (four terminal blocks) can

also be used but you will have to steal the ground elsewhere, as #21 doesn't have its own ground

line and the ADC measures input voltages with respect to the system ground.

LEDs

There is one red and one yellow LED. The red LED is connected to the SCL line of the I2C interface,

the yellow LED — to the SDA line.

Sample project

The use of this Tibbit is illustrated by a Tibbo BASIC test project. Yo can nd it here:

https://github.com/tibbotech/CA-Test-Tibbits-13-14

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Tibbit Module