VCC1

VCC2

GND1

GND2

OUTA

16

14

13

2, 8

9, 15

4

XOUT

XIN

5

6

2

MSP430

G2132

(14-PW)

INA

OUTD

1

3

4

5

6

ISO7341

DVss

DVCC

0.1 F

0.1 F

0.1 F

EN1

EN2

7

10

INB

12

11

OUTB

OUTC

IND

0.1 F

INC

SDI

P1.4

SCLK

SDO

9

6

7

8

4.7 k

4.7 k

28

VBD

AGND

CH0

1, 22

CS

26

23

24

25

SCLK

SDI

20

SDO

ADS7953

CH15

5

BDGND

27

32

VA

31

REFP

2

MXO

3

AINP

REFM

30

VIN

GND

VOUT

2

6

4

REF5025

1 F

10 F

VS

0.1 F

MBR0520L

MBR0520L

1:1.33

0.1 F

3

1

D2

SN6501

D1

VCC

4, 5

2

GND

3.3 V

IN

EN

GND

OUT

4

1

2

3

TLV70733

10 F

3.3VISO

10 F

22 F

16 Analog

Inputs

ISO-BARRIER

25

ISO7340C, ISO7340FC, ISO7341C, ISO7341FC, ISO7342C, ISO7342FC

www.ti.com

SLLSEI6G – SEPTEMBER 2014 – REVISED JANUARY 2017

Product Folder Links: ISO7340C ISO7340FC ISO7341C ISO7341FC ISO7342C ISO7342FC

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Copyright © 2014–2017, Texas Instruments Incorporated

Typical Application (continued)

10.2.2 Typical Application for Module With 16 Inputs

The ISO7341x device and several other components from Texas Instruments can be used to create an isolated

serial peripheral interface (SPI) for input module with 16 inputs.

Figure 26. Isolated SPI for an Analog Input Module With 16 Inputs

10.2.2.1 Design Requirements

Refer to Isolated Data Acquisition System for Process Control for the design requirements.

10.2.2.2 Detailed Design Procedure

Refer to Isolated Data Acquisition System for Process Control for the detailed design procedures.

10.2.2.3 Application Curves

Refer to Isolated Data Acquisition System for Process Control for the application curves.