AT90USB1287 Atmel Corporation, AT90USB1287 Datasheet - Page 324
AT90USB1287
Manufacturer Part Number
AT90USB1287
Description
Manufacturer
Atmel Corporation
Specifications of AT90USB1287
Flash (kbytes)
128 Kbytes
Pin Count
64
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
48
Ext Interrupts
16
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device + OTG
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
8
Eeprom (bytes)
4096
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
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
10
Input Capture Channels
1
Pwm Channels
9
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90USB1287-16AU
Manufacturer:
ATMEL
Quantity:
1 550
Part Number:
AT90USB1287-16AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
AT90USB1287-16MU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT90USB1287-AU
Manufacturer:
ATMEL
Quantity:
1 459
Part Number:
AT90USB1287-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT90USB1287-MU
Manufacturer:
KEMET
Quantity:
30 000
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25.7
324
ADC Conversion Result
AT90USB64/128
Figure 25-12. Integral Non-linearity (INL)
Figure 25-13. Differential Non-linearity (DNL)
After the conversion is complete (ADIF is high), the conversion result can be found in the ADC
Result Registers (ADCL, ADCH).
For single ended conversion, the result is:
• Differential Non-linearity (DNL): The maximum deviation of the actual code width (the interval
• Quantization Error: Due to the quantization of the input voltage into a finite number of codes,
• Absolute Accuracy: The maximum deviation of an actual (unadjusted) transition compared to
between two adjacent transitions) from the ideal code width (1 LSB). Ideal value: 0 LSB.
a range of input voltages (1 LSB wide) will code to the same value. Always ± 0.5 LSB.
an ideal transition for any code. This is the compound effect of offset, gain error, differential
error, non-linearity, and quantization error. Ideal value: ± 0.5 LSB.
Output Code
Output Code
0x000
0x3FF
0
1 LSB
V
V
REF
REF
Input Voltage
Input Voltage
Ideal ADC
Actual ADC
7593K–AVR–11/09
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