IL485 NVE, IL485 Datasheet - Page 6

• Manufacturer Part Number: IL485
• Description: ISOLATOR HS MAG DIGITAL 16SOICW
• Manufacturer: NVE
• Series: IsoLoop®r

Specifications of IL485

• Rohs Status: RoHS non-compliant
• Inputs - Side 1/side 2: RS-485
• Number Of Channels: 1
• Isolation Rating: 2500Vrms
• Voltage - Supply: 4.25V, 5V
• Data Rate: 35Mbps
• Propagation Delay: 27ns
• Output Type: Logic
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Operating Temperature: -40°C ~ 85°C
• Other names: 390-1001

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 IL485 is fully compliant with generic EMC standards
EN50081, EN50082-1 and the umbrella line-voltage standard for
Information Technology Equipment (ITE) EN61000. The
IsoLoop Isolator’s Wheatstone bridge configuration and
differential magnetic field signaling ensure excellent EMC
performance against all relevant standards. NVE conducted
compliance tests in the categories below:
EN50081-1
EN50082-2: Industrial Environment
ENV50204
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:
Residential, Commercial & Light Industrial
Methods EN55022, EN55014
Methods EN61000-4-2 (ESD), EN61000-4-3 (Electromagnetic
Field Immunity), EN61000-4-4 (Electrical Transient Immunity),
EN61000-4-6 (RFI Immunity), EN61000-4-8 (Power Frequency
Magnetic Field Immunity), EN61000-4-9 (Pulsed Magnetic
Field), EN61000-4-10 (Damped Oscillatory Magnetic Field)
Radiated Field from Digital Telephones (Immunity Test)
NVE Corporation
Cross-axis Field Direction
11409 Valley View Road
Eden Prairie, MN 55344-3617 USA
6
Telephone: [phone]
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:
I
Where f = operating frequency
Power Supply Decoupling
Both V
capacitors. These should be placed as close as possible to V
for proper operation. Additionally, V
10 µF tantalum capacitor.
IN
= 40 x f
f
MAX
DD1
= 50 MHz
f
MAX
and V
x 1 mA
DD2
4
must be bypassed with 47 nF ceramic
Fax [phone]
DD2
Internet: www.isoloop.com
should be bypassed with a
IL485
DD
pins