Is o la t e d Tra n s fo rm e r Drive r
fo r P CMCIA Ap p lic a t io n s
ISOLATION
BARRIER
1CT : 1.5CT : 3CT
V
IN
5V INPUT
MAX845
1
D1
78L05
4 x 1N5817
10µF
6
3
8
ISO
5V
MAX845
V
CC
FS
D2
4
ON/OFF
SD
79L12
ISO
GND1
GND2
10µF
-12V
2
7
74HC04
START
6N136
INPUT CLOCK
8
7
6
5
1
2
3
4
200Ω
7
QH
3k
14
11
12
10
6
QG
SER
5
74HC595 QF
10µF
4
3
QE
QD
QC
QB
QA
SCK
RCK
SCLR
MAX176
D11(MSB)
D10
0.1µF
1
2
8
6N136
6N136
2
V
V
SS
DD
8
7
6
5
1
2
3
4
1
D9
7
6
5
200Ω
ANALOG
INPUT
AIN
CONVST
CLOCK
DATA
15
16
5V
INPUT
D8
3k
3
4
5V
INPUT
VREF
GND
13
8
470Ω
0.1µF
74HC04
0.1µF
1
2
3
4
8
7
6
5
10µF
0.1µF 10µF
8
8.2k
7
6
QH
′
D7
QH
QG
14
11
12
10
D6
SER
SIGNAL
GROUND
5
D5
74HC595 QF
4
D4
QE
QD
QC
QB
QA
SCK
RCK
SCLR
3
D3
2
D2
1
D1
15
16
5V
INPUT
D0 (LSB)
5V
INPUT
13
8
0.1µF
Figure 6. Typical Isolated Data-Conversion Application
8
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
