NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com
Functional Diagram
High Speed Digital Coupler
IL710ISOLOOP®
Features
·+5V/+3.3V or +5V only CMOS/TTL Compatible
·High Speed: 110 MBd
·2500VRMS Isolation (1 Min.)
·2 ns Typical Pulse Width Distortion
·4 ns Typical Propagation Delay Skew
·10 ns Typical Propagation Delay
·30 kV/us Typical Common Mode Rejection
·Tri State Output
·8-pin PDIP and 8-pin SOIC Packages
·UL1577 Approved (File # E207481)
·IEC 61010-1 Approved (Report # 607057)
Isolation Applications
·Digital Fieldbus
·RS485 and RS422
·Multiplexed Data Transmission
·Data Interfaces
·Board-To-Board Communication
·Digital Noise Reduction
·Operator Interface
·Ground Loop Elimination
·Peripheral Interfaces
·Serial Communication
·Logic Level Shifting
Description
NVE's family of high-speed digital isolators are CMOS devices created by
integrating active circuitry and our GMR-based and patented* IsoLoop®
technology. The IL710 is the world's fastest digital isolator with a 110
Mbaud data rate. The symmetric magnetic coupling barrier provides a
typical propagation delay of only 10 ns and a pulse width distortion of 2 ns
achieving the best specifications of any isolator device. Typical transient
immunity of 30 kV/µs is unsurpassed. The IL710 is ideally suited for
isolating applications such as PROFIBUS, RS-485, RS422 and others.
The IL710 is available in 8-pin PDIP and 8-pin SOIC packages and
performance is specified over the temperature range of -40°C to +100°C
without any derating.
Isoloop®is a registered trademark of NVE Corporation
* US Patent number 5,831,426; 6,300,617 and others
IL710ISOLOOP®
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NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com
Recommended Operating Conditions
Parameters Symbol Min. Max. Units
Ambient Operating Temperature TA-40 100 oC
Supply Voltage (3.3/5.0 V operation) VDD1,VDD23.0 5.5 Volts
Supply Voltage (5.0 V operation) VDD1,VDD24.5 5.5 Volts
Logic High Input Voltage VIH 2.4 VDD1Volts
Logic Low Input Voltage VIL 0 0.8 Volts
Minimum Signal Rise and Fall Times tIR,tIF 1Psec
Absolute Maximum Ratings
Parameters Symbol Min. Max. Units
Storage Temperature TS-55 175 oC
Ambient Operating Temperature(1) TA-55 125 oC
Supply Voltage VDD1,VDD2-0.5 7 Volts
Input Voltage VI-0.5 VDD1+0.5 Volts
Input Voltage VOE -0.5 VDD2+0.5 Volts
Output Voltage VO-0.5 VDD2+0.5 Volts
Output Current Drive IO10 mA
Lead Solder Temperature (10s) 280 oC
ESD 2kV Human Body Model
Insulation Specifications
Parameter Condition Min. Typ. Max. Units
Barrier Impedance >1014 ||3 :__pF
Creepage Distance (External) 7.036 (PDIP)mm
4.026 (SOIC)
Leakage Current 240 VRMS 0.2 PA
60Hz
Package Characteristics
Parameter Symbol Min. Typ. Max. Units Test Conditions
Capacitance (Input-Output)(5) CI-O1.1 pF f= 1MHz
Thermal Resistance (PDIP)TJCT 150 oC/W Thermocouple located at
(SOIC)TJCT 240 oC/W center underside of package
Package Power Dissipation PPD 150 mW
Model Pollution Material Max Working Package Type
Degree Group Voltage 8–PDIP 8–SOIC
IL710-2 II III 300 VRMS 9
IL710-3 II III 150 VRMS 9
IEC61010-1
TUV Certificate Numbers: B 01 07 44230 001 (PDIP)
B 01 07 44230 002 (SOIC)
Classification as Table 1.
UL 1577
Component Recognition program. File # E207481
Rated 2500Vrms for 1min.
NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com
Electrical Specifications
Electrical Specifications are Tmin to Tmax unless otherwise stated.
Parameter Symbol 3.3 Volt Specifications 5.0 Volt Specifications Units Test Conditions
DC Specifications Min. Typ. Max. Min. Typ. Max.
Input Quiescent Supply Current IDD1810 10 15 PA
Output Quiescent Supply Current IDD23.3 4 5 6 mA
Logic Input Current II-10 10 -10 10 PA
Logic High Output Voltage VOH VDD2-0.1 VDD2VDD2-0.1 VDD2VIO=-20 PA, VI=VIH
0.8*VDD2VDD2-0.5 0.8*VDD2VDD2-0.5 IO= -4 mA, VI=VIH
Logic Low Output Voltage VOL 0 0.1 0 0.1 VIO= 20 PA, VI=VIL
0.5 0.8 0.5 0.8 IO= 4 mA, VI=VIL
Switching Specifications
Maximum Data Rate 100 110 100 110 MBd CL= 15 pF
Pulse Width PW 10 10 ns
Propagation Delay
Input to Output (High to Low) tPHL 12 18 10 15 ns CL= 15 pF
Propagation Delay
Input to Output (Low to High) tPLH 12 18 10 15 ns CL= 15 pF
Propagation Delay Enable to Output
(High to High Impedance) tPHZ 35 3 5 ns CL= 15 pF
Propagation Delay Enable to Output
(Low to High Impedance) tPLZ 35 3 5 ns CL= 15 pF
Propagation Delay Enable to Output
(High Impedance to High) tPZH 35 3 5 ns CL= 15 pF
Propagation Delay Enable to Output
(High Impedance to Low) tPZL 35 3 5 ns CL= 15 pF
Pulse Width Distortion(2) 23 2 3
Propagation Delay Skew(3) tPSK 4 6 4 6 ns CL= 15 pF
Output Rise Time (10-90%) tR2 4 1 3 ns CL= 15 pF
Output Fall Time (10-90%) tF2 4 1 3 ns CL= 15 pF
Common Mode Transient |CMH|
Immunity (Output Logic High or 20 30 20 30 kV/Ps Vcm = 300V
Logic Low) (4) |CML|
IL710ISOLOOP®
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Notes:
1. Absolute Maximum ambient operating temperature means the
device will not be damaged if operated under these conditions. It
does not guarantee performance.
2. PWD is defined as | tPHL - tPLH |. %PWD is equal to the PWD
divided by the pulse width.
3. tPSK is equal to the magnitude of the worst case difference in tPHL
and/or tPLH that will be seen between units at 25OC.
4. CMHis the maximum common mode voltage slew rate that can be
sustained while maintaining VO> 0.8 VDD2. CMLis the maximum
common mode input voltage that can be sustained while
maintaining VO< 0.8 V. The common mode voltage slew rates
apply to both rising and falling common mode voltage edges.
5. Device is considered a two terminal device:
pins 1-4 shorted and pins 5-8 shorted.
IL710ISOLOOP®
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NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com
Application Notes:
Dynamic Power Consumption
Isoloop£devices achieve their low power consumption from the
manner by which 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 2.5ns wide, the power
consumption is independent of mark-to-space ratio and solely
dependent on frequency. This has obvious advantages over
optocouplers whose power consumption is heavily dependent on
its on-state and frequency.
The approximate power supply current per channel for
Power Supply Decoupling
Both power supplies to these devices should be decoupled with
low ESR 47 nF ceramic capacitors. For data rates in excess of
10MBd, use of ground planes for both GND1 and GND2 is highly
recommended. Capacitors should be located as close as possible to
the device.
Signal Status on Start-up and Shut Down
To minimize power dissipation, the input signals are differentiated
and then latched on the output side of the isolation barrier to
reconstruct the signal. This could result in an ambiguous output
state depending on power up, shutdown and power loss
sequencing. Therefore, the designer should consider the inclusion
of an initialization signal in his start-up circuit. Initialization
consists of toggling the input either high then low or low then
high, depending on the desired state.
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.
Data Transmission Rates
The reliability of a transmission system is directly related to the
accuracy and quality of the transmitted digital information. For a
digital system, those parameters which determine the limits of the
data transmission are pulse width distortion and propagation delay
skew.
Propagation delay is the time taken for the signal to travel through
the device. This is usually different when sending a low-to-high
than when sending a high-to-low signal. This difference, or error,
is called pulse width distortion (PWD) and is usually in ns. It may
also be expressed as a percentage:
This figure is almost three times better than for any available
optocoupler with the same temperature range, and two times better
than any optocoupler regardless of published temperature range.
The IsoLoop®range of isolators surpasses the 10% maximum
PWD recommended by PROFIBUS, and will run at almost 35 Mb
before reaching the 10% limit.
Propagation delay skew is the difference in time taken for two or
more channels to propagate their signals. This becomes significant
when clocking is involved since it is undesirable for the clock
pulse to arrive before the data has settled. A short propagation
delay skew is therefore critical, especially in high data rate parallel
systems, to establish and maintain accuracy and repeatability. The
IsoLoop®range of isolators all have a maximum propagation delay
skew of 6 ns, which is five times better than any optocoupler.
PWD% = Maximum Pulse Width Distortion (ns) x 100%
Signal Pulse Width (ns)
For example: For data rates of 12.5 Mb
PWD% = 3 ns x 100% = 3.75%
80 ns
IL710ISOLOOP®
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NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com
RS-485 Truth Table
TXD RTS A B RXD
10ZZX
00ZZX
11101
01010
Isolated PROFIBUS / RS-485
Applications
Reference 485 Drivers (Texas Instruments)
65ALS176 (-40°C to +85°C)
75ALS176 (0°C to +70°)
VDD1and VISO should be decoupled with 10 nF
capacitors at IL710 supply pins
IL710ISOLOOP®
NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com
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Truth Table
VIVOE VO
LLL
HLH
LHZ
HHZ
Legend
tPLH Propagation Delay, Low to High
tPHL Propagation Delay, High to Low
tPW Minimum Pulse Width
tPLZ Propagation Delay, Low to High Impedance
tPZH Propagation Delay, High Impedance to High
tPHZ Propagation Delay, High to High Impedance
tPZL Propagation Delay, High Impedance to Low
tRRise Time
tFFall Time
Timing Diagram
IR Soldering Profile
Pin Configuration
Recommended profile shown. Maximum
temperature allowed on any profile is 260° C.
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NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com
IL710-2 (8-Pin PDIP Package)
IL710-3 (Small Outline SOIC-8 package)
IL710ISOLOOP®
Ordering Information: use the following format to order these devices
IL 710 -2 B TR7
Bulk Package
Blank = Tube
TR7 = 7’’ Tape and Reel
TR13 = 13’’ Tape and Reel
Supply Voltage
Blank = 3.3/5.0 VDC
B = 5.0 VDC
Package
-2 = PDIP
-3 = SOIC (0.15’’)
Base Part Number
710 = 1 drive channel
Product Family
IL = Isolators
Valid Part Numbers
IL 710-2
IL 710-2B
IL 710-3
IL 710-3B
IL 710-3BTR13
IL 710-3BTR7
IL 710-3TR13
IL 710-3TR7
NVE Corporation
11409 Valley View Road
Eden Prairie, Mn 55344-3617 USA
Telephone: (952) 829-9217
Fax: (952) 829-9189
Internet: www.nve.com
e-mail: isoinfo@nve.com
About NVE
NVE Corporation is a world leader in the practical commercialization of "spintronics," which many experts
believe represents the next generation of microelectronics — the successor to the transistor. Unlike
conventional electronics, which rely on electron charge, spintronics uses electron spin to store and transmit
information. Spintronics devices are smaller, faster, and more accurate, compared to charge-based
microelectronics.
It is the spin of electrons that causes magnetism. NVE's products use proprietary spintronic materials called
Giant Magnetoresistors (GMR). These materials are made of exotic alloys a few atoms thick, and provide
very large signals (the "Giant" in "Giant Magnetoresistor"). NVE has the unique capability to combine
leading edge GMR materials with integrated circuits to make high performance electronic components.
We are pioneers in creating practical products using this revolutionary technology and introduced the world's
first GMR products in 1994. We also license spintronics/Magnetic Random Access Memory (MRAM)
designs to world-class memory manufacturers.
Our products include:
· Digital Signal Isolators
· Isolated Bus Transceivers
· Magnetic Field Sensors
· Magnetic Field Gradient Sensors (Gradiometer)
· Digital Magnetic Field Sensors.
The information provided by NVE Corporation is believed to be accurate. However, no responsibility is
assumed by NVE Corporation for its use, nor for any infringement of patents, nor rights or licenses granted
to third parties, which may result from its use. No license is granted by implication, or otherwise, under any
patent or patent rights of NVE Corporation. NVE Corporation does not authorize, nor warrant, any NVE
Corporation product for use in life support devices or systems or other critical applications. The use of NVE
Corporation’s products in such applications is understood to be entirely at the customer's own risk.
Specifications shown are subject to change without notice.
ISB-DS-001-IL710-F
July 2002
