ATtiny43U datasheet(115/182 Pages) ATMEL

115 / 182 page

115

8048B–AVR–03/09

16. Analog to Digital Converter

16.1

Features

• 10-bit Resolution

• 1 LSB Integral Non-linearity

• ± 2 LSB Absolute Accuracy

• 13µs Conversion Time

• 15 kSPS at Maximum Resolution

• Four Multiplexed Single Ended Input Channels

• Temperature Sensor Input Channel

• Optional Left Adjustment for ADC Result Readout

• 0 - V

CC ADC Input Voltage Range

• 1.1V ADC Reference Voltage

• Free Running or Single Conversion Mode

• ADC Start Conversion by Auto Triggering on Interrupt Sources

• Interrupt on ADC Conversion Complete

• Sleep Mode Noise Cancele

16.2

Overview

ATtiny43U features a 10-bit, successive approximation Analog-to-Digital Converter (ADC). A

block diagram of the ADC is shown in Figure 16-1.

Figure 16-1. Analog to Digital Converter Block Schematic

ADMUX

DECODER

8-BIT DATA BUS

ADCSRA

ADCH+ADCL

TRIGGER

SELECT

PRESCALER

CONVERSION LOGIC

10-BIT DAC

ADCSRB

ADC3

ADC2

ADC1

ADC0

VCC

INPUT

MUX

ADC IRQ

SAMPLE & HOLD

COMPARATOR

VBAT

1/2

INTERNAL

REFERENCE

TEMPERATURE

SENSOR

AGND

ADC MUX OUTPUT

ATtiny43U Datasheet(PDF) 115 Page - ATMEL Corporation

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