深圳市中立信电子科技有限公司

1 Features

1• 1, 5, 25, and 150-Mbps Signaling Rate Options

– Low Channel-to-Channel Output Skew;

1-ns Max

– Low Pulse-Width Distortion (PWD); 1-ns Max

– Low Jitter Content; 1 ns Typ at 150 Mbps

• 50 kV/μs Typical Transient Immunity

• Operates with 2.8-V (C-Grade),

3.3-V, or 5-V Supplies

• 4-kV ESD Protection

• High Electromagnetic Immunity

• –40°C to +125°C Operating Range

2 Applications

• Industrial Fieldbus

– Modbus

– Profibus™

– DeviceNet™ Data Buses

• Computer Peripheral Interface

• Servo Control Interface

• Data Acquisition

3 Description

The ISO7220x and ISO7221x family devices are

dual-channel digital isolators. To facilitate PCB layout,

the channels are oriented in the same direction in the

ISO7220x and in opposite directions in the ISO7221x.

These devices have a logic input and output buffer

separated by TI’s silicon-dioxide (SiO2

) isolation

barrier, providing galvanic isolation of up to 4000 VPK

per VDE. Used in conjunction with isolated power

supplies, these devices block high voltage and isolate

grounds, as well as prevent noise currents on a data

bus or other circuits from entering the local ground

and interfering with or damaging sensitive circuitry.