AT90PWM216 Atmel Corporation, AT90PWM216 Datasheet - Page 260
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AT90PWM216
Manufacturer Part Number
AT90PWM216
Description
Manufacturer
Atmel Corporation
Specifications of AT90PWM216
Flash (kbytes)
16 Kbytes
Pin Count
24
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
19
Ext Interrupts
4
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
2
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
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 105
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
4
Output Compare Channels
12
Input Capture Channels
1
Pwm Channels
7
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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22. Digital to Analog Converter - DAC
22.1
7710F–AVR–09/11
Features
•
•
•
•
•
•
The AT90PWM216/316 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 dedi-
cated driver.
This allow to drive (worst case) a 1nF capacitance in parallel with a resistor higher than 33K load
with a time constant around 1us. Response time and power consumption are improved by
reducing the load (reducing the capacitor value and increasing the load resistor value (The best
case is a high impedance)).
The DAC has a separate analog supply voltage pin, AV
0.3V from V
pin.
The reference voltage is the same as the one used for the ADC,
– ADMUX” on page
age 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 150mV and AVcc-150mV
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 100 Ohm.
CC
. See the paragraph
249.. These nominally 2.56V Vref or AV
“ADC Noise Canceler” on page 243
CC
. AV
CC
AT90PWM216/316
are provided On-chip. The volt-
CC
See “ADC Multiplexer Register
must not differ more than ±
on how to connect this
260
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