DIGITAL ECU TUNER 3 – User Manual
Analog output (Analog Out)
Analog output (Analog Out) is made of a high quality 10 – bit
DAC converter. Maximal signal resolution is 0,0049V. In the
Setup/Analog Output Configuration window, it is possible to choose
the voltage step, which would correspond to the value 1 on the map.
It is 0.0195V, 0.0098V or 0.0049V, respectively. The choice of the
step directly influences the maximal possible change of the output
signal. For 0.0195V it is +/- 2.5V, for 0.0098V +/-1.25V and for
0.0049 +/-0.625V. No matter which step of the signal change is
chosen, the interpolation of the map’s values is conducted with the
full 10 bit resolution. There is also an option to define the initial range of the output signal. It means that
independently of the calculated analog output value, the output will never be lower than Analog Out Min or higher
than Analog Out Max. In the Setup bookmark, it is possible to set the offset (Analog Out Offset) for the analog
output (the way of calculating the value of the output voltage can be found at the description of the analog inputs).
The possibility to set the value of the device’s initial voltage is an additional option. DET3 needs about 7ms for the
initialization and to start working. During this process, voltage of the analog output equals 0V. It is possible to
enforce a given initial voltage during the initialization process. It may be required for some ECU, which at this time
is reading the voltage from a sensor (MAP sensor, MAF sensor), and in case of 0V, to report an error. In such
situations, the initial voltage value should be set to the sensor’s reading when the engine is turned off.
Attention !
Connecting the analog output directly into the ground or + 12V may cause a damage
of the DAC converter!
Page 17
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