ATmega64M1 Atmel Corporation, ATmega64M1 Datasheet - Page 223

• Manufacturer Part Number: ATmega64M1
• Manufacturer: Atmel Corporation

Specifications of ATmega64M1

• Flash (kbytes): 64 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 27
• Ext Interrupts: 27
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 1
• Can: 1
• Lin: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 14
• Input Capture Channels: 1
• Pwm Channels: 10
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

21. ADC – Analog to Digital Converter
21.1
8209D–AVR–11/10
Features
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The ATmega16M1/32M1/64M1 features a 10-bit successive approximation ADC. The ADC is
connected to an 15-channel Analog Multiplexer which allows eleven single-ended input. The sin-
gle-ended voltage inputs refer to 0V (GND).
The device also supports 3 differential voltage input amplifiers which are equipped with a pro-
grammable gain stage, providing amplification steps of 14dB (5×), 20dB (10×), 26dB (20×), or
32dB (40×) on the differential input voltage before the A/D conversion. On the amplified chan-
nels, 8-bit resolution can be expected.
The ADC contains a Sample and Hold circuit 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
on page
The ADC has a separate analog supply voltage pin, AV
from V
Internal reference voltages of nominally 2.56V or AV
ence may be externally decoupled at the AREF pin by a capacitor for better noise performance.
10-bit Resolution
0.5 LSB Integral Non-linearity
±2 LSB Absolute Accuracy
8µs - 250µs Conversion Time
Up to 120 kSPS at Maximum Resolution
11 Multiplexed Single Ended Input Channels
3 Differential input channels with accurate (5%) programmable gain 5, 10, 20 and 40
Optional Left Adjustment for ADC Result Readout
0 - V
Selectable 2.56V 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 Canceler
Temperature Sensor
LiN Address Sense (ISRC Voltage Measurement)
Vcc Voltage Measurement
CC
CC
224.
ADC Input Voltage Range
. See the paragraph
“ADC Noise Canceler” on page 230
ATmega16M1/32M1/64M1
CC
CC
are provided On-chip. The voltage refer-
. AV
CC
must not differ more than ±0.3V
on how to connect this pin.
Figure 21-1
223