AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 226
AT90PWM81
Manufacturer Part Number
AT90PWM81
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT90PWM161.pdf
(325 pages)
Specifications of AT90PWM81
Flash (kbytes)
8 Kbytes
Pin Count
20
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
20
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
3
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.25
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 125
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
1
Output Compare Channels
8
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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18. Digital to Analog Converter - DAC
18.1
226
Features
AT90PWM81
•
•
•
•
•
•
The AT90PWM81 features a 10-bit Digital to Analog Converter. This DAC can be used for the analog
comparators
The DAC has a separate analog supply voltage pin, AV
V
The reference voltage is the same as the one used for the ADC,
ADMUX” on page
ence may be externally decoupled at the AREF pin by a capacitor for better noise performance.
CC
10 bits resolution
8 bits linearity
+/- 0.5 LSB accuracy between 100mV and AVcc-100mV
Vout = DAC*Vref/1023
The DAC could be connected to the negative inputs of the analog comparators and/or to a dedicated output
driver.
Output impedance around 1KOhm.
. See the paragraph
216.. These nominally 2.56V Vref or AV
“ADC Noise Canceler” on page 209
CC
. AV
on how to connect this pin.
CC
CC
are provided On-chip. The voltage refer-
must not differ more than ± 0.3V from
See “ADC Multiplexer Register –
7734P–AVR–08/10
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