LM3S812_16 Datasheet, PDF (332/590 Pages) Texas Instruments – Stellaris LM3S812 Microcontroller

Analog-to-Digital Converter (ADC)
10
10.1
Analog-to-Digital Converter (ADC)
An analog-to-digital converter (ADC) is a peripheral that converts a continuous analog voltage to a
discrete digital number.
The Stellaris^® ADC module features 10-bit conversion resolution and supports two input channels,
plus an internal temperature sensor. The ADC module contains four programmable sequencer which
allows for the sampling of multiple analog input sources without controller intervention. Each sample
sequence provides flexible programming with fully configurable input source, trigger events, interrupt
generation, and sequence priority.
The Stellaris ADC module provides the following features:
■ Two analog input channels
■ Single-ended and differential-input configurations
■ On-chip internal temperature sensor
■ Sample rate of 250 thousand samples/second
■ Flexible, configurable analog-to-digital conversion
■ Four programmable sample conversion sequences from one to eight entries long, with
corresponding conversion result FIFOs
■ Flexible trigger control
– Controller (software)
– Timers
– Analog Comparators
– PWM
– GPIO
■ Hardware averaging of up to 64 samples for improved accuracy
■ Converter uses an internal 3-V reference
Block Diagram
Figure 10-1 on page 333 provides details on the internal configuration of the ADC controls and data
registers.
332
July 14, 2014
Texas Instruments-Production Data