ATMEGA323L-4AI Atmel, ATMEGA323L-4AI Datasheet - Page 127
ATMEGA323L-4AI
Manufacturer Part Number
ATMEGA323L-4AI
Description
IC AVR MCU 32K LV 4MZ IND 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA323L-4PC.pdf
(247 pages)
Specifications of ATMEGA323L-4AI
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
ATMEGA323L4AI
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Analog to Digital
Converter
Features
1457G–AVR–09/03
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The ATmega323 features a 10-bit successive approximation ADC. The ADC is con-
nected to an 8-channel Analog Multiplexer which allows each pin of Port A to be used as
input for the ADC.
The ADC contains a Sample and Hold Amplifier which ensures that the input voltage to
the ADC is held at a constant level during conversion. A block diagram of the ADC is
shown in Figure 60.
The ADC has two separate analog supply voltage pins, AVCC and AGND. AGND must
be connected to GND, and the voltage on AVCC must not differ more than ±0.3V from
V
pins.
Internal reference voltages of nominally 2.56V or AVCC are provided On-chip. The
2.56V reference may be externally decoupled at the AREF pin by a capacitor for better
noise performance. See “Internal Voltage Reference” on page 31 for a description of the
internal voltage reference.
CC
10-bit Resolution
0.5 LSB Integral Non-linearity
±2 LSB Absolute Accuracy
65 - 260 µs Conversion Time
Up to 15 kSPS at Maximum Resolution
Up to 76 kSPS at 8-bit Resolution
Eight Multiplexed Single Ended Input Channels
Optional Left Adjustment for ADC Result Readout
0 - V
Selectable 2.56V ADC Reference Voltage
Free Run or Single Conversion Mode
Interrupt on ADC Conversion Complete
Sleep Mode Noise Canceler
. See the paragraph ADC Noise Canceling Techniques on how to connect these
CC
ADC Input Voltage Range
ATmega323(L)
127
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