MAX253ESA+ Maxim, MAX253ESA+ Datasheet - Page 13

• Manufacturer Part Number: MAX253ESA+
• Description: Transformer Dvr for Iso. RS-485/RS-232 I'face; Single Supply 5.0 or 3.3 V, SOIC8
• Manufacturer: Maxim

Specifications of MAX253ESA+

• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

Figure 10. Typical Isolated ADC Application
10µF
GROUND
SIGNAL
ANALOG
10µF
0.1µF
*SEE TABLE 2
INPUT
0.1µF
ISO
5V
1
2
3
4
V
AIN
VREF
GND
DD
______________________________________________________________________________________
MAX176
78L05
CONVST
CLOCK
DATA
V
SS
0.1µF 10µF
8
7
6
5
-12V
ISO
10µF
79 L12
3k
470
3k
10µF
4 x 1N5817
Isolated RS-485 Interface
8
7
6
5
8
7
6
5
1
2
3
4
1CT : 1.5CT : 3CT*
ISOLATION
BARRIER
6N136
6N136
6N136
Transformer Driver for
8
7
6
5
1
2
3
4
1
2
3
4
V
5V
IN
200
200
8.2k
+5V
1
6
8
74HC04
D1
D2
V
CC
GND1
2
MAX253
+5V
+5V
GND2
7
14
11
12
10
14
11
12
10
SD
13
13
SER
SCK
RCK
SCLR
SER
SCK
RCK
SCLR
74HC595
74HC595
4
QH
8
ON/OFF
74HC04
8
8
QH
QG
QD
QC
QB
QA
QH
QG
QD
QC
QB
QA
QF
QE
QF
QE
15
16
15
16
7
6
5
4
3
2
1
7
6
5
4
3
2
1
INPUT CLOCK
0.1µF
0.1µF
D11(MSB)
D10
D9
D8
+5V
D7
D6
D5
D4
D3
D2
D1
D0(LSB)
+5V
START
13