ATMEGA644PA-AU Atmel, ATMEGA644PA-AU Datasheet - Page 339

• Manufacturer Part Number: ATMEGA644PA-AU
• Description: IC MCU 8BIT 64KB FLASH 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644PA-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: ATMEGA64x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, TWI, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 32
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

27.8
Table 27-17. ADC Characteristics, Single Ended Channel
Notes:
8272A–AVR–01/10
Symbol
AVCC
V
R
V
V
R
V
REF
INT1
INT2
REF
AIN
IN
ADC Characteristics
1. Values are guidelines only.
Parameter
Resolution
Absolute accuracy (Including
INL, DNL, quantization error,
gain and offset error)
Integral Non-Linearity (INL)
Differential Non-Linearity (DNL)
Gain Error
Offset Error
Conversion Time
Clock Frequency
Analog Supply Voltage
Reference Voltage
Input Voltage
Input Bandwidth
Internal Voltage Reference
Internal Voltage Reference
Reference Input Resistance
Analog Input Resistance
164A/164PA/324A/324PA/644A/644PA/1284/1284P
Condition
Single Ended Conversion
Single Ended Conversion
V
ADC clock = 200 kHz
Single Ended Conversion
V
ADC clock = 1 MHz
Single Ended Conversion
V
ADC clock = 200 kHz
Noise Reduction Mode
Single Ended Conversion
V
ADC clock = 1 MHz
Noise Reduction Mode
Single Ended Conversion
V
ADC clock = 200 kHz
Single Ended Conversion
V
ADC clock = 200 kHz
Single Ended Conversion
V
ADC clock = 200 kHz
Single Ended Conversion
V
ADC clock = 200 kHz
Free Running Conversion
Single Ended Conversion
1.1V
2.56V, V
REF
REF
REF
REF
REF
REF
REF
REF
= 4V, V
= 4V, V
= 4V, V
= 4V, V
= 4V, V
= 4V, V
= 4V, V
= 4V, V
CC
> 2.7V
CC
CC
CC
CC
CC
CC
CC
CC
= 4V,
= 4V,
= 4V,
= 4V,
= 4V,
= 4V,
= 4V,
= 4V,
V
Min
CC
GND
2.33
1.0
1.0
13
50
- 0.3
(1)
Typ
3.25
3.25
38.5
2.56
-1.5
100
1.9
1.9
1.1
0.3
1.6
1.1
10
32
(1)
V
CC
Max
AVCC
1000
V
2.79
260
1.2
REF
+ 0.3
(1)
Units
LSB
Bits
kHz
kHz
MΩ
kΩ
µs
V
V
V
V
V
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