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參數(shù)資料
| 型號： | R83C154DTXXX-30R |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 30 MHz, MICROCONTROLLER, CQCC44 |
| 封裝： | LCC-44 |
| 文件頁數(shù)： | 103/108頁 |
| 文件大?。?/td> | 3682K |
| 代理商： | R83C154DTXXX-30R |
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94
8069R–AVR–06/2013
XMEGA A4
Not recommended for new designs -
Use XMEGA A4U series
Figure 36-1.
Analog Comparator Voltage Scaler vs. Scalefac
T = 25°C
Problem fix/Workaround
Use external voltage input for the analog comparator if accurate voltage levels are needed
3.
ADC has increased INL error for some operating conditions
Some ADC configurations or operating condition will result in increased INL error.
In signed mode INL is increased to:
– 6LSB for sample rates above 1Msps, and up to 8 LSB for 2Msps sample rate.
– 6LSB for reference voltage below 1.1V when VCC is above 3.0V.
– 20LSB for ambient temperature below 0 degree C and reference voltage below 1.3V.
In unsigned mode, the INL error cannot be guaranteed, and this mode should not be used.
Problem fix/Workaround
None, avoid using the ADC in the above configurations in order to prevent increased INL
error. Use the ADC in signed mode also for single ended measurements.
4.
ADC gain stage output range is limited to 2.4 V
The amplified output of the ADC gain stage will never go above 2.4 V, hence the differential
input will only give correct output when below 2.4 V/gain. For the available gain settings, this
gives a differential input range of:
–
1x
gain:
2.4
V
–
2x
gain:
1.2
V
–
4x
gain:
0.6
V
–
8x
gain:
300
mV
–
16x
gain:
150
mV
–
32x
gain:
75
mV
–
64x
gain:
38
mV
3.3 V
2.7 V
1.8 V
0
0.5
1
1.5
2
2.5
3
3.5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
SCALEFAC
V
SCALE
[V]
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