Datasheet IL3685P (NVE) - 7

IL3685P Magnetic Field Immunity
(12)
VDD1 = 5 V, VDD2 = 5 V
Power Frequency Magnetic Immunity HPF 3500 A/m 50Hz/60Hz Pulse Magnetic Field Immunity HPM 4500 A/m tp = 8µs Damped Oscillatory Magnetic Field HOSC 4500 A/m 0.1Hz – 1MHz Cross-axis Immunity Multiplier(13) KX 2.5
VDD1 = 3.3 V, VDD2 = 5 V
Power Frequency Magnetic Immunity HPF 1500 A/m 50Hz/60Hz Pulse Magnetic Field Immunity HPM 2000 A/m tp = 8µs Damped Oscillatory Magnetic Field HOSC 2000 A/m 0.1Hz – 1MHz Cross-axis Immunity Multiplier(13) KX 2.5
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.
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.
Data Rate (Mbps) IDD1 IDD2
1 150 μA 150 μA 10 1.5 mA 1.5 mA 20 3 mA 3 mA 40 6 mA 6 mA
Table 2. Typical Dynamic Supply Currents. Power Supply Decoupling
Both VDD1 and VDD2 must be bypassed with 47 nF ceramic capacitors. These should be placed as close as possible to VDD pins for proper operation. Additionally, VDD2 should be bypassed with a 10 µF tantalum capacitor.
DC Correctness
The IL3685 incorporates a patented refresh circuit to maintain the correct output state with respect to data input. At power up, the bus outputs will follow the Function Table shown on Page 1. The DE input should be held low during power-up to eliminate false drive data pulses from the bus. An external power supply monitor to minimize glitches caused by slow power-up and power-down transients is not required.
Maintaining Creepage
Creepage distances are often critical in isolated circuits. In addition to meeting JEDEC standards, NVE isolator packages have unique creepage specifications. Standard pad libraries often extend under the package, compromising creepage and clearance. Similarly, ground planes, if used, should be spaced to avoid compromising clearance. Package drawings and recommended pad layouts are included in this datasheet.
Electromagnetic Compatibility
IL3685-Series Transceivers are 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 Residential, Commercial & Light Industrial Methods EN55022, EN55014 EN50082-2: Industrial Environment 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) 7 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 YouTube.com/NveCorporation ©NVE Corporation