17-2000 C
2020-09-17
7(50)
ADQ8-8C Manual
17-2000 C 2020-09-17
7(50)
See
for more details on the clock system.
1.2.6
Analog signal range
The analog signal range (
ACTUAL_ANALOG_RANGE
) is symmetrical around zero. The value of the
analog signal range it is depending on the gain setting. With for example a range of, 500 mV
pp
, the ana-
log input signal can vary from –250 mV to +250 mV and the range can be moved from [–0 mV
+500 mV] to [–500 mV +0 mV] by the DC-offset feature,
.
The maximum digital code 2^15 represents an analog signal with a level
ACTUAL_ANALOG_RANGE / 2
at the input. A specific analog signal
ANALOG_LEVEL
will then be represented by the following digital
code:
DIGITAL_CODE_LEVEL = ANALOG_LEVEL / ( ACTUAL_ANALOG_RANGE / 2 ) * 2^15
(1)
A specific code
DIGITAL_CODE_LEVEL
then represent the analog level as:
ANALOG_LEVEL = ( DIGITAL_CODE_LEVEL / 2^15 ) * ( ACTUAL_ANALOG_RANGE / 2)
(2)
