AT90PWM81-16MF Atmel, AT90PWM81-16MF Datasheet - Page 212
AT90PWM81-16MF
Manufacturer Part Number
AT90PWM81-16MF
Description
IC MCU AVR 8K FLASH ISP 32QFN
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM81-16MN.pdf
(325 pages)
Specifications of AT90PWM81-16MF
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI
Peripherals
Brown-out Detect/Reset, PWM, WDT
Number Of I /o
20
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 11x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
32-MLF®, QFN
For Use With
ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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17.6.4
212
AT90PWM81
ADC Accuracy Definitions
differential inputs using the AMPxIS bit with both inputs unconnected.
Status register – AMP0CSR” on page
the measurement results. Using this kind of software based offset correction, offset on any channel can be
reduced below one LSB.
An n-bit single-ended ADC converts a voltage linearly between GND and V
lowest code is read as 0, and the highest code is read as 2
Several parameters describe the deviation from the ideal behavior:
Figure 17-10. Offset Error
• Offset: The deviation of the first transition (0x000 to 0x001) compared to the ideal transition (at 0.5
• Gain Error: After adjusting for offset, the Gain Error is found as the deviation of the last transition
LSB). Ideal value: 0 LSB.
(0x3FE to 0x3FF) compared to the ideal transition (at 1.5 LSB below maximum). Ideal value: 0 LSB
Output Code
Offset
Error
224.). This offset residue can be then subtracted in software from
n
-1.
V
REF
(See “Amplifier 0 Control and
REF
Input Voltage
in 2
n
Ideal ADC
Actual ADC
steps (LSBs). The
7734P–AVR–08/10
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