TC1775 datasheet(40/101 Pages) INFINEON

40 / 101 page

TC1775

Data Sheet

V1.2, 2002-05

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.

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