Datasheet

MAX191
Low-Power, 12-Bit Sampling ADC
with Internal Reference and Power-Down
______________________________________________________________________________________ 23
EN GND
9
12
4
1
5
TTL/CMOS
OUTPUTS
TTL/CMOS
INPUTS
11
3
6
10
D1
V
CC
D2
2
14
13
5V
1k
1k
1k
1k
1
2
4
3
T
1
602117970
(SCHOTT)
8
7
6
5
IC
3
ISOLATION
BARRIER
5
8 7
IC
2
1
2
4
3
8
7
6
1k
1k
1k
1k
1k
1k
Q
1
2N3906
Q
2
2N3906
IN
OUT
GND
100µF
16V
5V
100µF
6V
24
AIN+
AIN-
HBEN
RD
PAR
BIP
AGND
V
IN
18
16
20
23
5
6
4.7µF
0.1µF
0.1µF
2
12
REFADJ
V
SS
DGND
VREF
CS
SSTRB
DOUT
V
DD
3
4
21
19
22
8
7
0.1µF
IC
4
74L05
IC
5
MAX191
IC
1
MAX250
SHDN
CLK
IC
2-3
HCPL2630 (QUALITY TECHNOLOGIES)
Figure 24. Isolated Data-Acquisition Circuit