TC1775 Datasheet, PDF (40/101 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller

TC1775
Preliminary
Analog Digital Converters
The two on-chip Analog-to-Digital Converter (ADC) modules of the TC1775 offer 8-bit,
10-bit, or 12-bit resolution including sample-and-hold functionality. The A/D converters
operate using the method of the successive approximation. A multiplexer selects among
up to 16 analog input channels for each ADC. Conversion requests are generated either
under software control or by hardware. An automatic self-calibration adjusts the ADC
modules to changing temperatures or process variations.
Features:
• 8-bit, 10-bit, 12-bit A/D conversion
• Successive approximation conversion method
• Fast conversion times: e.g. 10-bit conversion (without sample time): 5.05 µs
• Total Unadjusted Error (TUE) of ±2 LSB @ 10-bit resolution
• Integrated sample-and-hold functionality
• Sixteen analog input channels
• Dedicated control and status registers for each analog channel
• Powerful conversion request sources
• Selectable reference voltages for each channel
• Programmable sample and conversion timing schemes
• Limit checking
• Broken wire – short circuit detection
• Flexible service request generation
• Synchronization of the two on-chip A/D Converters
• Automatic control of external analog multiplexer
• Equidistant samples initiated by timer
• External trigger inputs for conversion requests
• Two external trigger inputs, connected with the General Purpose Timer Array (GPTA)
• Power reduction and clock control
Figure 11 shows a global view of the ADC module kernels with the module specific
interface connections.
Each of the ADC modules communicates with the external world via five digital I/O lines
and sixteen analog inputs. Clock control, address decoding, and interrupt service
request control are managed outside the ADC module kernel. Two trigger inputs and a
synchronization bridge are used for internal control purposes.
Data Sheet
36
V1.2, 2002-05