Adc Application Reference Circuit Diagram; High-Precision Adc Reference Circuit Diagram; General Precision Adc Reference Circuit Diagram - STC micro STC8A8K64D4 Series Reference Manual

STC8A8K64D4 Series Manual
E Overall error
T
E Offset error
O
E Gain error
G
E Differential nonlinear error
D
E Integral nonlinear error
I
R Channel equivalent resistance
AIN
Antistatic resistance connected in
series before the sample and hold
R
ESD
C Internal sample and hold capacitor
ADC

17.4 ADC application reference circuit diagram

17.4.1 High-precision ADC reference circuit diagram

17.4.2 General precision ADC reference circuit diagram

capacitor
CD431/TL431 (2.5V reference source)
511R
External analog
signal input
System power
(Can be powered from USB)
0.1u
22u
220uH
Vin
Power On Vcc
47u
0R 0R
Analog System Digital
GND GND GND
System clock<=10MHz
C? 104(0.1uF)
- 0.5
- -0.1
- 0
- 0.7
- 1
-
∞
- 700
- 16.5
1
P0.3 P0.2
2
P0.4 P0.1
3
P0.5 P0.0
4
P0.6 P2.7
5
P0.7 P2.6
6
P1.0 P2.5
7
P1.1 P2.4
8
P1.2 P2.3
9
P1.3 P2.2
10
103 P1.4 P2.1
11
P1.5 P2.0
12
P1.6 P4.1
13
P1.7 P3.7
14
AGnd P3.6
15
AVref P3.5
AVcc 16
AVcc P3.4
17
P5.4 P3.3
18
Vcc P3.2
19
P5.5 P3.1
20
C? Gnd P3.0
STC8A8K64D4
System clock>10MHz
103(0.01uF)
1 LSB
1 LSB
1 LSB
1.5 LSB
2 LSB
- Ohm
- Ohm
- pF
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
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