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Chapter 3 Hardware Overview
PCI-4451/4452 User Manual 3-2
©
National Instruments Corporation
Figure 3-2.
Analog Function Block Diagram
AC/DC
Coupling
MUX0
INPUT/CAL
MUX0
0 dB/20 dB
ATTEN
MUX0
AC/DC
Coupling
MUX1
INPUT/CAL
MUX1
0 dB/20 dB
ATTEN
MUX1
ENABLE1
Analog Bus
Analog Mezzanine Bus (to Digital Section)
Serial Data Manager
DIFF
Gain
AMP
ADC0
DIFF
Gain
AMP
ADC1
DIFF
Gain
AMP
ADC2
†
AC/DC
Coupling
MUX2
INPUT/CAL
MUX2
0 dB/20 dB
ATTEN
MUX2
DIFF
Gain
AMP
ADC3
†
AC/DC
Coupling
MUX3
INPUT/CAL
MUX3
0 dB/20 dB
ATTEN
MUX3
Analog
Overrange
Detect
Gain/Offset
Calibration
AC/DC
MUX
Control
INPUT/CAL
MUX
Control
ATTEN
MUX
Control
Gain
Control
ADC Control
ADC Clock
Manager
DAC Control
Attenuation
Control
Output
Enable
DIFF
ATTEN
AMP
DAC0
††
ENABLE0
Analog Bus
DIFF
ATTEN
AMP
DAC1
††
Gain/Offset
Calibration
General Control
Digital
Overrange
Detect
DAC Clock
Manager
EEPROM
†
PCI-4452 only
††
PCI-4451 only
LP
Filter
LP
Filter
LP
Filter
LP
Filter
Trigger
Control
User.book Page 2 Tuesday, April 14, 1998 10:20 AM