JYTEK PCIe-69834, Руководство пользователя

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14 Operations
not only accurate DC performance but also high signal-to-noise
ratio, and high spurious-free dynamic range in AC perfor-
mance. The ADC transfers data to system memory via the high
speed PCI Express Gen 1 X 4 interface.
For auto-calibration, internal calibration provides stable and
accurate reference voltage to the AI.
3.2.2 Input Range and Data Format
Data format of the PCIe-
69834
is 2’s
complement.
Table 3-1: Input Range and Data Format
Table 3-2: Input Range FSR and –FSR Values
D15 D14 D13 D12 …. D3 D2 D1 D0
D15 to D0 bits represent the 16-bit data from ADC (2’s complement)
Full Scale
Range
Least Significant
Bit
FSR-1LSB -FSR
Bipolar
Analog
Input
± 10.0V 0.305 mV 9.999694824 -10V
± 5.0V 0.153 mV 4.999847412 -5V
± 1.0V 0.031 mV 0.999969482 -1V
± 0.5V 0.015 mV 0.499984741 -0.5V
Digital Code
N/A N/A 7FFF 8000