AT90PWM2 datasheet(266/365 Pages) ATMEL

tên linh kiện	AT90PWM2

Giải thích chi tiết về linh kiện	8-bit Microcontroller with 8K Bytes In-System Programmable Flash

PDF	365 Pages

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nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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AT90PWM2/3

4317B–AVR–02/05

Digital to Analog Converter - DAC

Features

• 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.

• The output impedance of the driver is lower than 1KOhms. So the driver is able to load a

1nF capacitance in parallel with a resistor higher than 33K with a time constant around

1us.

The AT90PWM2/3 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

CC. AVCC must not differ more

than ± 0.3V from V

CC. See the paragraph “ADC Noise Canceler” on page 250 on how to

connect this pin.

The reference voltage is the same as the one used for the ADC, See “ADC Multiplexer

CC are provided

On-chip. The voltage reference may be externally decoupled at the AREF pin by a

capacitor for better noise performance.

AT90PWM2 bảng dữ liệu(PDF) 266 Page - ATMEL Corporation