Datasheet

MAX187/MAX189
+5V, Low-Power, 12-Bit Serial ADCs
15Maxim Integrated
Figure 15. QSPI Serial Interface Timing (CPOL = CPHA = 0)
Figure 16. 12-Bit Isolated ADC
MSB D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 LSB
HI-Z
t
CONV
DOUT
CS
SCLK
HI-Z
EOC
MAX187
6N136
ANALOG
INPUT
SIGNAL
GROUND
4.7µF
5
4
2
1
6
8
7
3
10µF
0.1µF
GND
REF
AIN
V
DD
DOUT
SCLK
CS
SHDN
+5V
+5V ON THIS SIDE OF
BARRIER MUST BE ISOLATED POWER
7
8
1
+5V
2
6
5
3
4
3kI
200I
6N136
74HC04
74HC04
7
8
2
3
6
5
4
1
200I
8.2kI
6N136
1
2
6
7
3
5
4
8
3kI
470I
14
11
12
10
7
6
5
4
3
2
1
15
16
D11 (MSB)
D10
D9
D8
+5V
0.1µF
SER
SCK
RCK
SCLR
QH
SCLK/INPUT CLOCK
QG
QF
QE
QD
QC
QB
QA
13 8
9
74HC595
14
11
12
10
6
7
5
4
3
2
1
15
16
D3
D7
D6
D5
D4
D10
D1
D0 (LSB)
+5V
+5V
0.1µF
SER
SCK
RCK
SCLR
QH
QH’
QG
QF
QE
QD
QC
QB
QA
13 8
74HC595
CS/START