
117
8048C–AVR–02/12
ATtiny43U
16. Analog to Digital Converter
16.1
Features
10-bit Resolution
1 LSB Integral Non-linearity
± 2 LSB Absolute Accuracy
13 s 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
Figure 16-1. Analog to Digital Converter Block Schematic
ADMUX
DECODER
8-BIT DATA BUS
MUX[2:0]
ADCSRA
ADCH+ADCL
ADPS0
ADEN
ADPS1
ADPS2
AD
A
T
E
ADIF
ADSC
TRIGGER
SELECT
AD
T
S
[2:0]
ST
AR
T
PRESCALER
ADC[9:0]
CONVERSION LOGIC
10-BIT DAC
ADCSRB
-
+
ADC3
ADC2
ADC1
ADC0
VCC
CC
INPUT
MUX
CHANNEL
ADIE
ADC IRQ
SAMPLE & HOLD
COMPARATOR
VBAT
1/2
INTERNAL
REFERENCE
TEMPERATURE
SENSOR
AGND
ADC MUX OUTPUT
REFS
INTERRUPT
FLA
G
S
ADLAR