TC1796
Functional Description
3.16
Fast Analog-to-Digital Converter Unit (FADC)
The FADC module of the TC1796 basically is a 4-channel A/D converter with 10-bit
resolution that operates by the method of the successive approximation.
The main FADC functional blocks shown in Figure 16 are:
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•
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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 anti aliasing and data reduction
filters.
The Channel Trigger Control block defines the trigger and gating conditions for the
four FADC channels. The gating source inputs GS[7:0] and trigger source inputs
TS[7:0] are connected with GPTA0 module outputs, with GPIO port lines, and
external request unit outputs.
The Channel Timers can independently trigger the conversion of each FADC
channel.
The A/D control block is responsible for the overall FADC functionality.
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The FADC module is supplied by the following power supply and reference voltage lines:
• VDDMF/VDDMF: FADC Analog Part Power Supply (3.3V)
• VDDAF/VDDAF
:
FADC Analog Part Logic Power Supply (1.5V)
• VFAREF/VFAGND: FADC Reference Voltage/FADC Reference Ground
Data Sheet
65
V1.0, 2008-04
INFINEON [ Infineon ]
