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Chapter 1

SPRU812A – September 2007 – Revised October 2007

Analog-to-Digital Converter (ADC)

The TMS320x2833x ADC module is a 12-bit pipelined analog-to-digital converter (ADC). The analog

circuits of this converter, referred to as the core in this document, include the front-end analog multiplexers

(MUXs), sample-and-hold (S/H) circuits, the conversion core, voltage regulators, and other analog

supporting circuits. Digital circuits, referred to as the wrapper in this document, include programmable

conversion sequencer, result registers, interface to analog circuits, interface to device peripheral bus, and

interface to other on-chip modules.

This reference guide is applicable for the ADC found on the TMS320x2833x family of processors. This

includes all Flash-based, ROM-based and RAM-based devices within the 2833x family.

Topic .................................................................................................. Page

1.1 Features ................................................................................... 10

1.2 Autoconversion Sequencer Principle of Operation ........................ 12

1.3 Uninterrupted Autosequenced Mode ........................................... 19

1.4 ADC Clock Prescaler ................................................................ 26

1.5 Low-power Modes ..................................................................... 26

1.6 Power-up Sequence .................................................................. 27

1.7 Sequencer Override Feature ....................................................... 27

1.8 ADC Calibration ........................................................................ 28

1.9 Internal/External Reference Voltage Selection .............................. 30

1.10 Offset Error Correction .............................................................. 31

1.11 ADC to DMA Interface ................................................................ 32

SPRU812A – September 2007 – Revised October 2007 Analog-to-Digital Converter (ADC) 9

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ADC 320F Spezifikationen Seite 9