AT90PWM81-16SF Atmel, AT90PWM81-16SF Datasheet - Page 203

• Manufacturer Part Number: AT90PWM81-16SF
• Description: IC MCU AVR 8K FLASH ISP 20SOIC
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM81-16SF

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 20-SOIC (7.5mm Width)
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

17. Analog to Digital Converter - ADC
17.1
7734P–AVR–08/10
Features
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The AT90PWM81 features a 10-bit successive approximation ADC. The ADC is connected to an 15-
channel Analog Multiplexer which allows eleven single-ended input. The single-ended voltage inputs
refer to 0V (GND).
The device also supports 2 differential voltage input combinations which are equipped with a programma-
ble gain stage, providing amplification steps of 14dB (5x), 20 dB (10x), 26 dB (20x), or 32dB (40x) on the
differential input voltage before the A/D conversion. On the amplified channels, 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
The ADC has a separate analog supply voltage pin, AV
V
Internal reference voltages of nominally 2.56V or AV
be externally decoupled at the AREF pin by a capacitor for better noise performance.
CC
10-bit Resolution
0.5 LSB Integral Non-linearity
± 2 LSB Absolute Accuracy
8- 250 µs Conversion Time
Up to 120 kSPS at Maximum Resolution
11 Multiplexed Single Ended Input Channels
One Differential input channels with accurate (5%) programmable gain 5, 10, 20 and 40
Optional Left Adjustment for ADC Result Readout
0 - V
Selectable 2.56 V 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
. See the paragraph
CC
ADC Input Voltage Range
“ADC Noise Canceler” on page 209
CC
CC
are provided On-chip. The voltage reference may
. AV
on how to connect this pin.
CC
must not differ more than ± 0.3V from
Figure
AT90PWM81
17-1.
203