Texas Instruments TMS320F2837 D Series

TMS320F2837xD Microcontroller Workshop - Analog Subsystem 6 - 1
Analog Subsystem
Introduction
The Analog Subsystem consists of the Analog-to-Digital Converter (ADC), Comparator
Subsystem (CMPSS), Digital-to-Analog Converter (DAC), and the Sigma Delta Filter Module
(SDFM). This module will explain the operation of each subsystem. Even though the SDFM is a
digital peripheral, it will be covered in this module.
Module Objectives
Module Objectives
 Understand the operation of the:
Analog-to-Digital Converter (ADC)
Comparator Subsystem (CMPSS)
Digital-to-Analog Converter (DAC)
Sigma Delta Filter Module (SDFM)

Use the ADC to perform data acquisition
Note: Even though the SDFM is a digital peripheral, it will be covered in this module
Analog Subsystem:
• Up to Four dual-mode ADCs
o 16-bit mode
 1 MSPS each (up to 4 MSPS system)
 Differential inputs
 External reference
o 12-bit mode
 3.5 MSPS each (up to 14 MSPS system)
 Single-ended
 External reference
• Up to Eight comparator subsystems
o Each contains:
 Two 12-bit reference DACs
 Two comparators
 Digital glitch filter
• Three 12-bit buffered DAC outputs
• Sigma-Delta Filter Module (SDFM)