IL422

8

NVE Corporation

11409 Valley View Road, Eden Prairie, MN 55344-3617

Phone: (952) 829-9217

www.nve.com

youtube.com/NveCorporation

iso-apps@nve.com

Application Information

Electrostatic Discharge Sensitivity

This product has been tested for electrostatic sensitivity to the

limits stated in the specifications. However, NVE recommends that

all integrated circuits be handled with appropriate care to avoid

damage. Damage caused by inappropriate handling or storage could

range from performance degradation to complete failure.

Electromagnetic Compatibility

The IL422 is fully compliant with IEC 61000-6-1 and

IEC 61000-6-2 standards for immunity, and IEC 61000-6-3,

IEC 61000-6-4, CISPR, and FCC Class A standards for emissions.

Immunity to external magnetic fields is even higher if the field

direction is “end-to-end” rather than to “pin-to-pin” as shown in the

diagram below:

Cross-axis Field Direction

Dynamic Power Consumption

IsoLoop Isolators achieve their low power consumption from the

way they transmit data across the isolation barrier. By detecting the

edge transitions of the input logic signal and converting these to

narrow current pulses, a magnetic field is created around the GMR

Wheatstone bridge. Depending on the direction of the magnetic

field, the bridge causes the output comparator to switch following

the input logic signal. Since the current pulses are narrow, about

2.5 ns, the power consumption is independent of mark-to-space

ratio and solely dependent on frequency. This has obvious

advantages over optocouplers, which have power consumption

heavily dependent on frequency and time.

The approximate power supply current per channel is:

IIN = 40 x

f

x

1

mA

Where f = operating frequency

fMAX = 50 MHz

Power Supply Decoupling

VDD1 and VDD2 should be bypassed with 0.1 µF typical

(0.047 µF minimum) capacitors as close as possible to the VDD

pins.

fMAX

4