ATXMEGA32D4-CU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATXMEGA32D4-CU

8/16-bit Atmel XMEGA D4 Microcontroller

Atmel Corporation 

XMEGA D4

25. ADC – 12-bit Analog to Digital Converter

25.1 Features

25.2 Overview

• One Analog to Digital Converter (ADC)

• 12-bit resolution

• Up to 200 thousand samples per second

– Down to 3.6µs conversion time with 8-bit resolution

– Down to 5.0µs conversion time with 12-bit resolution

• Differential and single-ended input

– Up to 12 single-ended inputs

– 12x4 differential inputs without gain

– 8x4 differential inputs with gain

• Built-in differential gain stage

– 1/2x, 1x, 2x, 4x, 8x, 16x, 32x, and 64x gain options

• Single, continuous and scan conversion options

• Three internal inputs

– Internal temperature sensor

– VCC voltage divided by 10

– 1.1V bandgap voltage

• Internal and external reference options

• Compare function for accurate monitoring of user defined thresholds

• Optional event triggered conversion for accurate timing

• Optional interrupt/event on compare result

The ADC converts analog signals to digital values. The ADC has 12-bit resolution and is capable

of converting up to 200 thosuand samples per second (ksps). The input selection is flexible, and

both single-ended and differential measurements can be done. For differential measurements,

an optional gain stage is available to increase the dynamic range. In addition, several internal

signal inputs are available. The ADC can provide both signed and unsigned results.

The ADC measurements can either be started by application software or an incoming event from

another peripheral in the device. The ADC measurements can be started with predictable timing,

and without software intervention.

Both internal and external reference voltages can be used. An integrated temperature sensor is

available for use with the ADC. The VCC/10 and the bandgap voltage can also be measured by

the ADC.

The ADC has a compare function for accurate monitoring of user defined thresholds with mini-

mum software intervention required.

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8135L–AVR–06/12

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