ADLINK PCIe-9852 - Manual (Page 23)

Operations 13
PXIe-9852
3 Operations
This chapter contains information regarding analog input, trigger-
ing and timing for the PCIe-9852.
3.1 Functional Block Diagram
3.2 Analog Input Channel
3.2.1 Analog Input Front-End Configuration
Figure 3-1: Analog Input Architecture of the PCIe-9852
Input Configuration
The input channel terminates with equivalent 50Ω or 1 MΩ
input impedance (selected by software). The 14-bit ADC pro-
vides not only accurate DC performance but also high signal-
to-noise ratio, and high spurious-free dynamic range in AC per-
formance. The ADC transfers data to system memory via the
high speed PCI Express Gen2 X 4 interface.
For auto-calibration, internal calibration provides stable and
accurate reference voltage to the AI.
CH0
CH1
CLK IN
TRG IN
Analog Front End 14 bit ADC
buffer
Synthesizer
B to B
High Speed
Interface
Daughter Board Carrier Board
Calibration CKT
ADC
Interface
Trigger
Interface
FIFO
Local Bus
Interface
PCI Express
Controller
FPGA
PC
I E
x pr
e ss BU
S
AUX DIO Port
TRG OUT
buffer
Protection ckt
Calibration Source
AC / DC
Couple
High Impedance
Buffer
50 Ÿ / Hi-Z 1x / 10x
amplifier
ADC Driver
100MHz
LPF
0
0
0
0
0
14
14-bit ADC