TC1796
Peripheral Units (Vol. 2 of 2)
Fast Analog-to-Digital Converter (FADC)
User’s Manual 26-3 V2.0, 2007-07
FADC, V2.0
As shown in Figure 26-1, the main FADC functional blocks are:
• The Input Stage – contains the differential inputs and the programmable amplifier
• The A/D Converter – is responsible for the analog-to-digital conversion
• The Data Reduction Unit – contains programmable antialiasing and data reduction
filters
• The Channel Trigger Control block – determines the trigger and gating conditions for
the four FADC channels
• The Channel Timers – can independently trigger the conversion of each FADC
channel
• The A/D Control block is responsible for the overall FADC functionality.
The FADC module is supplied by the following power supply and reference voltage lines:
• V
DDMF
/V
DDMF
: FADC Analog Part Power Supply (3.3 V)
• V
DDAF
/V
DDAF
: FADC Analog Part Logic Power Supply (1.5 V)
• V
FAREF
/V
FAGND
: FADC Reference Voltage (3.3 V)/FADC Reference Ground
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