Low-power quad-channel 2/2 digital isolator protects sensitive circuitry

05-02-2015 | Texas Instruments | Power

The ISO734x low-power quad-channel 2/2 digital isolator from Texas
Instruments (TI) provides galvanic isolation up to 3000Vrms for one minute
as per UL and 4242 VPK per VDE.

The devices have four isolated channels comprised of logic input and output
buffers separated by a silicon dioxide (SiO2) insulation barrier.

The ISO7340 has four channels in forward direction. The ISO7341 has three
forward and one reverse-direction channels. The ISO7342 has two forward and
two reverse-direction channels.

Used in conjunction with isolated power supplies, the devices prevent noise
currents on a data bus or other circuits from entering the local ground and
interfering with or damaging sensitive circuitry.

Through innovative chip design and layout techniques, electromagnetic
compatibility has been significantly enhanced to enable system-level ESD,
EFT, surge and emissions compliance.

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