ES51993
11,000 Counts ADC
Application example
7.5V ZD
10uF
+
*2
5.6V ZD
MPU power
VDD
*1
+
10uF
*3
MPU
0.1uF
V- or DGND
VSS
0.1uF
I/O
port
470 nF
32
31
30
29
28
27
26
25
CAZ
C+
24
1
2
3
4
5
6
7
8
470nF
CINT
CREF+
CREF-
REF+
REF-
BUF
C-
23
***R
**68nF
220 nF
OSC1
22
OSC2
21
uP_VCC
20
BUZOUT
19
EOC
18
SCLK
17
91k
12M or 4MHz
10k VR
*4
**56k
RAZ
9
10
11
12
13
14
15
16
5.6V ZD
V-
15k
1 uF
10 nF 10 nF
100k
Input
**10nF
Note:
Zener diodes in above circuit are used for IC protection, so MUST be soldered on
PCB first.
*1*2*3*4: Depend on power design
** Depends on conversion rates setting: V-= -3.0V
(c)RBUF(kΩ)
(c)RBUF(kΩ)
(a)Conversion rate (b)CINT(uF)
(a)Conversion rate (b)CINT(uF)
128/s
96/s
0.01
0.01
0.01
22
30
39
22
36
27
47
16/s
9.6/s
8/s
0.068
0.047
0.068
0.1
0.1
0.22
0.22
27
68
56
82
91
68
91
76.8/s
64/s
0.022
0.022
0.033
0.033
3.84/s
3.2/s
1.92/s
1.6/s
38.4/s
32/s
19.2/s
*** R=10~22MΩ resistor is optional
17
06/09/20
CYRUSTEK [ Cyrustek corporation ]
