ST AN2834 Application note
AN2834
STM32F10xxx
ADC
STM32F10xxx 3 12 / (ADC)1μs ADC
/ ADCADC
ADCADC ADC 2
●ADC ADC
本译文的英文版下载地址为
http://www.st.com/stonline/products/literature/an/15067.pdf
2008 11 AN2834 1
ST
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STM32F10xxx ADC |
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1 |
ADC |
3 |
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1.1 |
ADC |
3 |
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1.1.1 |
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3 |
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1.1.2 |
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1.1.3 |
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1.1.4 |
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6 |
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1.1.5 |
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6 |
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1.2 |
ADC |
7 |
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1.2.1 |
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7 |
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1.2.2 |
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7 |
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1.2.3 |
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7 |
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1.2.4 |
ADC |
7 |
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1.2.5 |
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8 |
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1.2.6 |
PCB |
8 |
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1.2.7 |
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9 |
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1.2.8 |
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9 |
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1.2.9 |
I/O |
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1.2.10 |
EMI |
10 |
2 |
ADC |
11 |
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2.1 ADC ADC |
11 |
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2.2 |
ADC |
11 |
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2.2.1 |
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11 |
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2.2.2 |
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12 |
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2.2.3 |
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12 |
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2.2.4 |
ADC |
13 |
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2.2.5 |
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14 |
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2.2.6 |
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14 |
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2.2.7 |
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15 |
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2.2.8 |
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15 |
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2.2.9 |
I/O |
15 |
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2.2.10 |
EMI |
16 |
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2.2.11 |
PCB |
16 |
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2.2.12 |
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18 |
3 |
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19 |
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2/19
2008 11 AN2834 1
ST
AN2834 |
ADC |
1 ADC
1.1ADC
STM32F10xxx ADC LSB LSB
1 LSB = VREF+ / 212 VDDA / 212
ADC 01 0.5 LSB 1.5 LSB1 0.5 LSBEO
STM32F10xxx ADC LSB
1 LSB = VREF+/4096 ( VREF+ VDDA /4096)
VREF+=3.3V 402.8μV(0.5 LSB = 0.5 x 805.6μV) 1ADC 0 550μV1
EO = -
EO = 550μV - 402.8μV = 141.2μV EO = 141.2μV / 805.6μV = 0.17 LSB
0.5 LSB
1
0.5 LSB
VAIN = VSSA ADC 0
3/19
2008 11 AN2834 1
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AN2834 |
ADC |
2
EG
FFEh FFFh VREF+ – 0.5LSB
FFEh FFFh VREF+ = 3.3V
3.299597V
ADC FFFh VAIN < VREF+ – 0.5LSB
EG = –
VREF+ = 3.3V VAIN = 3.298435V FFEh FFFh EG = 3.298435 V – 3.299597 V
EG = –1162μV
EG = (–1162μV / 805.6 μV) LSB = –1.44 LSB
VAIN VREF+ (FFFh) VREF+ 3 4
3
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2008 11 AN2834 1
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AN2834 |
ADC |
4
(DLE) “ ”ADC DLE ED 5
ED = – 1LSB
1LSB1LSB ADC DLE
5
1LSB1.9998V 2.0014V, 2.0014V – 1.9998V = 1.6mV ED (2.0014V) (1.9998V) 1LSB
VREF+ = 3.3V 1.9998V(9B1h) 9B0h 9B2h2.0014V(9B3h) 9B2h 9B4h
9B2h
9B3h – 9B1h 2.0014 V – 1.9998V = 1.6 mV (1660 μV) ED = 1660 μV – 805.6 μV
ED = 854.4 μV
ED = (854.4 μV/805.6 μV) LSB ED = 1.06 LSB
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2008 11 AN2834 1
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AN2834 |
ADC |
2.0014V 9B2h 1LSBED
(ILE) ILE EL 6
A/D EL
ILE (INL) ILE DLE6
( 0 1) 550μV ( FFEh FFFh) 3.298435V(
) 1h FFFh
(TUE) ADCTUE ET 7
TUE EO EG EL ED
7
VREF+ = 3.3V VAIN = 2V 9B2h 9B4hDLE ILE
6/19
2008 11 AN2834 1
ST
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