IL712-3B - NVE Corp/Isolation Products

Features

·+5V/+3.3V or +5V only CMOS/TTL Compatible

·High Speed: 110 MBaud

·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 Transient Immunity

·2 ns Channel to Channel Skew

·8-pin PDIP and 8-pin SOIC Packages

·UL1577 Approved (File # E207481)

·IEC 61010-1 Approved (Report # 607057)

Isolation Applications

·ADCs and DACs

·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 IL711 and IL712 are two channel versions of the world's

fastest digital isolator with a 110 Mbaud data rate. These devices offer true

isolated logic integration in a level not previously available. All transmit

and receive channels operate at 110 Mbd over the full temperature and

supply voltage range. 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 IL711 has two transmit

channels; the IL712 has one transmit channel and one receive channel. The

IL712 operates in full duplex mode making it ideal for many field bus

applications. PROFIBUS and RS485 configurations are achieved by

combining the IL711/12 and the IL710, which together meet the overall

propagation delay specification.

The IL711 and IL712 are 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.

Functional Diagram

Isoloop®is a registered trademark of NVE Corporation

* US Patent number 5,831,426; 6,300,617 and others

IL711/712ISOLOOP®

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com

High Speed Dual Digital Isolator

IL711

IL712

IL711/712ISOLOOP®

Recommended Operating Conditions

Parameters Symbol Min. Max. Units

Ambient Operating Temperature TA-40 100 oC

Supply Voltage (3.0/5.0 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 VDD Volts

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 VDD+0.5 Volts

Output Voltage VO-0.5 VDD+0.5 Volts

Drive Channel Output Current 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-O2 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

IL711-2, IL712-2 II III 300 VRMS 9

IL711-3, IL712-3 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 Volt Specifications Units Test Conditions

DC Specifications Min. Typ. Max. Min. Typ. Max.

Quiescent Supply Current IL711 IDD1

810 1015 PA

IL712 1.5 2 2.5 3 mA

Quiescent Supply Current IL711 IDD2

3.3 4 5 6 mA

IL712 1.5 2 2.5 3 mA

Logic Input Current II-10 10 -10 10 PA

Logic High Output Voltage VOH VDD-0.1 VDD VDD-0.1 VDD VI

O=-20 PA, VI=VIH

0.8*VDD VDD-0.5 0.8*VDD VDD-0.5 IO= -4 mA, VI=VIH

Logic Low Output Voltage VOL 0 0.1 0 0.1 V IO= 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

Pulse Width Distortion(2)

| tPHL- tPLH | PWD 2 3 2 3 ns CL= 15 pF

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

Transient Immunity (Output Logic |CMH| 20 30 20 30 kV/Ps Vcm = 300V

High or Logic Low)(4) |CML|

Channel to Channel Skew TCSK 2 3 2 3 ns CL= 15 pF

IL711/712ISOLOOP®

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com

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 VDD. 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.

IL711/712ISOLOOP®

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 each channel 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. The

maximum channel to channel skew in the IsoLoop®coupler is only

3 ns which is ten 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

IL711/712ISOLOOP®

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com

Applications

RS-485 Truth Table

DDEABR

10ZZX

00ZZX

11101

01010

Isolated PROFIBUS / RS-485

IL711/712ISOLOOP®

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com

Timing Diagram

Legend

tPLH Propagation Delay, Low to High

tPHL Propagation Delay, High to Low

tPW Minimum Pulse Width

tRRise Time

tFFall Time

IR Soldering Profile

Recommended profile shown. Maximum

temperature allowed on any profile is 260° C.

IL711/712ISOLOOP®

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com

IL711-3 and IL712-3 (Small Outline SOIC-8 package)

IL711-2 and IL712-2 (8-Pin PDIP Package)

Ordering Information: use the following format to order these devices

IL 711 -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

711 = 2 drive channels

712 = 1 drive and 1 receive channel

Product Family

IL = Isolators

Valid Part Numbers

IL 711-2

IL 711-2B

IL 711-3

IL 711-3B

IL 711-3BTR13

IL 711-3BTR7

IL 711-3TR13

IL 711-3TR7

IL 712-2

IL 712-2B

IL 712-3

IL 712-3B

IL 712-3BTR13

IL 712-3BTR7

IL 712-3TR13

IL 712-3TR7

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-IL711/2-F

July 2002