ISO7720FDWVR datasheet(22/42 Pages) TI1

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Time = 3.5 ns / div

GND1

GND2

INB

OUTB

INA

OUTA

GND1

GND2

VCC2

VCC1

GND1

GND2

GND1

INB

OUTB

OUTA

INA

VCC1

VCC2

GND1

GND2

0.1 µF

ISO7720, ISO7721

SLLSEP3C – NOVEMBER 2016 – REVISED JULY 2018

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Product Folder Links: ISO7720 ISO7721

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Typical Application (continued)

9.2.1 Design Requirements

To design with these devices, use the parameters listed in Table 3.

Table 3. Design Parameters

PARAMETER

VALUE

Supply voltage, VCC1 and VCC2

2.25 V 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,

the ISO772x devices only require two external bypass capacitors to operate.

Figure 22. Typical ISO7721 Circuit Hook-up

9.2.3 Application Curve

The following typical eye diagrams of the ISO772x family of devices indicate low jitter and wide open eye at the

maximum data rate of 100 Mbps.

Figure 23. ISO7720 Eye Diagram at 100 Mbps PRBS,

5-V Supplies and 25°C

Figure 24. ISO7721 Eye Diagram at 100 Mbps PRBS,

5-V Supplies and 25°C

ISO7720FDWVR Datasheet(PDF) 22 Page - Texas Instruments

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