ADLINK Technology PCI-8136M Guia do Utilizador descarregar pdf (Página 43)

Operation Theorem • 35

4.1 AD Conversion and Preloaded Trigger

4.1.1 ADC

The PCI-8136M provides 6 Differential ADC channels. Each channel

consists of two inputs. One is for (+) signal and the other is for (-) signal. The

input signal may be voltage ranged from –10 ~ +10V or current ranged

from –20mA ~ 20mA. The ADC resolution is 12-bit. The following figure

shows the A (voltage or current) to D (value read) converting table. The zero

voltage or current is at value 2000.

Related functions:

_8136_A_Initial(): please refer to section 5.2

_8136_A_Read_Value(), _8136_A_Read_Volt(): please refer to

section 5.7

4.1.2 Voltage Compare

The voltage compare function of PCI-8136 is very useful. It allows us er to set

a compare value by software function. When one ADC signal reaches the

pre-set value, an interrupt will be generated for corresponding channel.

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