ATmega16M1 Atmel Corporation, ATmega16M1 Datasheet - Page 263

• Manufacturer Part Number: ATmega16M1
• Manufacturer: Atmel Corporation

Specifications of ATmega16M1

• Flash (kbytes): 16 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): 1
• Eeprom (bytes): 512
• 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

24. DAC – Digital to Analog Converter
24.1
24.2
8209D–AVR–11/10
Features
Overview
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The ATmega16M1/32M1/64M1 features a 10-bit Digital to Analog Converter. This DAC can be
used for the analog comparators and/or can be output on the D2A pin of the microcontroller via
a dedicated driver.
The DAC has a separate analog supply voltage pin, AV
from V
The reference voltage is the same as the one used for the ADC,
plexer Register” on page 242.
voltage reference may be externally decoupled at the AREF pin by a capacitor for better noise
performance.
10 bits resolution
8 bits linearity
±0.5 LSB accuracy between 100mV and AVcc - 100mV
V
The DAC could be connected to the negative inputs of the analog comparators and/or to a
dedicated output driver
The output impedance of the driver is around 100 Ohm. So the driver is able to load a 1nF
capacitance in parallel with a resistor higher than 33K with a time constant around 1µs
out
= DAC × Vref/1023
CC
. See the paragraph
“ADC Noise Canceler” on page 230
These nominally 2.56V Vref or AV
ATmega16M1/32M1/64M1
CC
. AV
CC
must not differ more than ±0.3V
on how to connect this pin.
CC
See “ADMUX – ADC Multi-
are provided On-chip. The
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