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

STC8A8K64D4 Series Manual
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E
T
Overall error
-
0.5
1
LSB
E
O
Offset error
-
-0.1
1
LSB
E
G
Gain error
-
0
1
LSB
E
D
Differential nonlinear error
-
0.7
1.5
LSB
E
I
Integral nonlinear error
-
1
2
LSB
R
AIN
Channel equivalent resistance
-
∞
-
Ohm
RESD
Antistatic resistance connected in
series before the sample and hold
capacitor
-
700
-
Ohm
C
ADC
Internal sample and hold capacitor
-
16.5
-
pF
17.4 ADC application reference circuit diagram
17.4.1 High-precision ADC reference circuit diagram
47u C?
P0.3
P0.4
P0.5
P0.6
P0.7
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
AGnd
AVref
AVcc
P5.4
Vcc
P5.5
Gnd
P0.2
P0.1
P0.0
P2.7
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P2.0
P4.1
P3.7
P3.6
P3.5
P3.4
P3.3
P3.2
P3.1
P3.0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
System power
(Can be powered from USB)
STC8A8K64D4
22u
0.1u
220uH
AVcc
CD431/TL431 (2.5V reference source)
511R
Vin
Power On Vcc
103
External analog
signal input
0R 0R
Analog
GND
System
GND
Digital
GND
C?
System clock<=10MHz System clock>10MHz
104(0.1uF) 103(0.01uF)
17.4.2 General precision ADC reference circuit diagram