14

13

INA

OUTD

3

4

5

6

0.1F

EN1

EN2

7

10

INB

12

11

OUTC

IND

INC

DVDD

DGND

2

GAIN1

24

25

26

GAIN0

SPEED

PWDN

AIN3+

AIN3-

AIN4+

A0

A1

AIN1+

AIN1-

AIN2+

SCLK

DOUT

REF+

REF-

AIN4-

1

16

2,8

9,15

GND1

GND2

23

20

19

28

8

7

27

0.1F

P3.1

P3.0

CLK

SOMI

13

11

12

14

4

2

MSP430

F2132

DVss

DVcc

0.1F

14

13

OUTD

3

4

5

6

0.1F

NC

EN

7

10

12

11

OUTC

IND

INC

1

16

2,8

9,15

GND1

GND2

0.1F

ISO7340

ISO7341

3.3V

3.3V

P3.7

P3.6

18

17

3.3V

22

AVDD

AGND

21

0.1F

AIN2-

13

14

17

16

15

11

12

18

INA

INB

OUTB

OUTA

OUTA

OUTB

1

0.1F

0.1F

Thermo

couple

Current

shunt

RTD

Bridge

XOUT

XIN

5

6

P3.4

15

P3.5

16

ADS1234

ISO-BARRIER

ISO7340C, ISO7340FC, ISO7341C, ISO7341FC, ISO7342C, ISO7342FC

SLLSEI6E – SEPTEMBER 2014 – REVISED APRIL 2015

www.ti.com

9 Applications and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

ISO734x use single-ended TTL-logic switching technology. Its supply voltage range is from 3 V to 5.5 V for both

design structure, digital isolators do not conform to any specific interface standard and are only intended for

isolating single-ended CMOS or TTL digital signal lines. The isolator is typically placed between the data

controller (that is,

μC or UART), and a data converter or a line transceiver, regardless of the interface type or

standard.

9.2 Typical Application

9.2.1 Isolated Data Acquisition System for Process Control

ISO734x combined with Texas Instruments' precision analog-to-digital converter and mixed signal micro-

controller can create an advanced isolated data acquisition system as shown in Figure 20.

Figure 20. Isolated Data Acquisition System for Process Control

20

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Product Folder Links: ISO7340C ISO7340FC ISO7341C ISO7341FC ISO7342C ISO7342FC