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

ISO7841

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

GND

2

6

4

REF5025

1 F

10 F

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

10 F

22 F

16

Analog

Inputs

ISO-BARRIER

ISO7841, ISO7841F

SLLSEM3C – NOVEMBER 2014 – REVISED JULY 2015

www.ti.com

9 Application 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

comes with enable pins on each side which can be used to put the respective outputs in high impedance for

multi master driving applications and reduce power consumption. ISO7841 uses single-ended CMOS-logic

designing with digital isolators, it is important to keep in mind that due to the single-ended 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

The Isolated SPI Interface is shown in Figure 16.

Figure 16. Isolated SPI Interface for an Analog Input Module With 16 Input

22

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