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STM32L475VC Datasheet(PDF) 136 Page - STMicroelectronics

Part # STM32L475VC
Description  Ultra-low-power ARM Cortex-M4 32-bit MCUFPU, 100DMIPS, up to 1MB Flash, 128 KB SRAM, USB OTG FS, analog, audio
PDF  193 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L475VC Datasheet(HTML) 136 Page - STMicroelectronics

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Electrical characteristics
STM32L475xx
136/193
DocID027692 Rev 2
Equation 1: RAIN max formula
The formula above (Equation 1) is used to determine the maximum external impedance
allowed for an error below 1/4 of LSB. Here N = 12 (from 12-bit resolution).
RAIN
TS
fADC CADC
2
N2
+
()
ln
×
×
----------------------------------------------------------------
RADC
–
<
Table 65. Maximum ADC RAIN(1)(2)
Resolution
Sampling cycle
@80 MHz
Sampling time [ns]
@80 MHz
RAIN max (Ω)
Fast channels(3)
Slow channels(4)
12 bits
2.5
31.25
100
N/A
6.5
81.25
330
100
12.5
156.25
680
470
24.5
306.25
1500
1200
47.5
593.75
2200
1800
92.5
1156.25
4700
3900
247.5
3093.75
12000
10000
640.5
8006.75
39000
33000
10 bits
2.5
31.25
120
N/A
6.5
81.25
390
180
12.5
156.25
820
560
24.5
306.25
1500
1200
47.5
593.75
2200
1800
92.5
1156.25
5600
4700
247.5
3093.75
12000
10000
640.5
8006.75
47000
39000
8 bits
2.5
31.25
180
N/A
6.5
81.25
470
270
12.5
156.25
1000
680
24.5
306.25
1800
1500
47.5
593.75
2700
2200
92.5
1156.25
6800
5600
247.5
3093.75
15000
12000
640.5
8006.75
50000
50000



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