1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

INA

INB

INC

OUTA

OUTB

OUTC

GND2

VCC2

2 mm maximum

from VCC2

EN2

GND2

EN1

GND1

2 mm maximum

from VCC1

GND1

VCC1

0.1 µF

0.1 µF

NC

NC

22

ISO7831, ISO7831F

SLLSEP8B – JULY 2015 – REVISED JUNE 2016

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Product Folder Links: ISO7831 ISO7831F

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Copyright © 2015–2016, Texas Instruments Incorporated

Typical Application (continued)

9.2.1 Design Requirements

For this design example, use the parameters listed in Table 3.

Table 3. Design Parameters

PARAMETER

VALUE

Supply voltage

2.25 to 5.5 V

Decoupling capacitor between VCC1 and GND1

0.1 µF

Decoupling capacitor from VCC2 and GND2

0.1 µF

9.2.2 Detailed Design Procedure

Unlike optocouplers, which require external components to improve performance, provide bias, or limit current,

ISO7831x only requires two external bypass capacitors to operate.

Figure 21. Typical ISO7831 Circuit Hook-up