ETC IL710T-3

IL710T
T-Series Wide Temperature Range
High Speed Digital Coupler
Functional Diagram
Features
· Wide Temperature Range -40°C to +125°C
· +5V/+3.3V 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 Approval Pending
· IEC 61010-1 Approval Pending
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 IL710T offers the user the widest temperature range
available in digital couplers. 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 +125°C.
Isoloop® is a registered trademark of NVE Corporation
* US Patent number 5,831,426; 6,300,617 and others
NVE Corporation
11409 Valley View Road
Eden Prairie, MN 55344-3617 USA
Telephone: (952) 829-9217
Fax: (952) 829-9189
Internet: www.isoloop.com
ISOLOOP®
IL710T
ISOLOOP®
Absolute Maximum Ratings
Parameters
Storage Temperature
Symbol
TS
Min.
-55
Max.
175
TA
-55
135
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
IO
10
mA
Ambient Operating Temperature(1)
Supply Voltage
Lead Solder Temperature (10s)
ESD
Units
o
C
C
o
280
2kV Human Body Model
C
o
Recommended Operating Conditions
Parameters
Ambient Operating Temperature
Supply Voltage (3.3/5.0 V operation)
Symbol
TA
Min.
-40
Max.
125
Units
o
C
VDD1,VDD2
3.0
5.5
Volts
Logic High Input Voltage
VIH
2.4
VDD
Volts
Logic Low Input Voltage
VIL
0
0.8
Volts
1
µsec
Typ.
>1014 ||3
Max.
Minimum Signal Rise and Fall Times
tIR,tIF
Insulation Specifications
Parameter
Barrier Impedance
Condition
Min.
7.036 (PDIP)
4.026 (SOIC)
Creepage Distance (External)
240 VRMS
Leakage Current
Units
Ω || pF
mm
µA
0.2
60Hz
Package Characteristics
Parameter
Capacitance (Input-Output)(5)
Thermal Resistance
(PDIP)
Symbol
CI-O
θJCT
Min.
Package Power Dissipation
Max.
150
240
θJCT
(SOIC)
Typ.
1.1
PPD
Units
pF
o
C/W
C/W
o
150
Test Conditions
f= 1MHz
Thermocouple located at
center underside of package
mW
IEC61010-1
TUV Certificate Numbers:
Pending (PDIP)
Pending (SOIC)
Classification as Table 1.
Model
IL710-2
IL710-3
Pollution
Degree
II
II
Material
Group
III
III
Max Working
Voltage
300 VRMS
150 VRMS
8–PDIP
9
Package Type
8–SOIC
9
UL 1577
Component Recognition program. File # Pending
Rated 2500Vrms for 1min.
2
NVE Corporation
11409 Valley View Road
Eden Prairie, MN 55344-3617 USA
Telephone: (952) 829-9217
Fax: (952) 829-9189
Internet: www.isoloop.com
IL710T
ISOLOOP®
Electrical Specifications
Electrical Specifications are Tmin to Tmax unless otherwise stated.
Parameter
Symbol
3.0-3.6 V Specifications
DC Specifications
Min.
Typ. Max.
Input Quiescent Supply Current
IDD1
8
10
Output Quiescent Supply Current
IDD2
3.3
4
Logic Input Current
II
Logic High Output Voltage
VOH
Logic Low Output Voltage
VOL
Switching Specifications
Dynamic Current Consumption(6)
Maximum Data Rate
10
0
0.5
300
420
100
110
Units
5
6
mA
10
µA
-10
VDD2-0.1 VDD2
0.8*VDD2 VDD2-0.5
0.1
0.8
100
10
Test Conditions
µA
V
IO =-20 µA, VI =VIH
I = -4 mA, V =V
IO = 20 µA, VI =VIL
I = 4 mA, V =V
O
0
0.5
0.1
0.8
V
500
640
µA/MHz
110
O
MBd
10
I
I
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
3
5
3
5
ns
CL = 15 pF
Propagation Delay Enable to Output
(Low to High Impedance)
tPLZ
3
5
3
5
ns
CL = 15 pF
Propagation Delay Enable to Output
(High Impedance to High)
tPZH
3
5
3
5
ns
CL = 15 pF
Propagation Delay Enable to Output
(High Impedance to Low)
tPZL
3
IL
ns
5
3
5
ns
CL = 15 pF
3
6
2
4
3
6
tPSK
2
4
ns
CL = 15 pF
Output Rise Time (10-90%)
tR
2
4
1
3
ns
CL = 15 pF
Output Fall Time (10-90%)
tF
2
4
1
3
ns
CL = 15 pF
kV/µs
Vcm = 300V
Fax: (952) 829-9189
Internet: www.isoloop.com
Common Mode Transient
Immunity (Output Logic High or
Logic Low) (4)
IH
CL = 15 pF
Pulse Width
Propagation Delay
Input to Output (High to Low)
Pulse Width Distortion(2)
Propagation Delay Skew(3)
PW
-10
VDD2-0.1 VDD2
0.8*VDD2 VDD2-0.5
4.5-5.5 V Specifications
Min.
Typ.
Max.
10
15
|CMH|
20
30
20
30
|CML|
Notes:
1.
2.
3.
4.
5.
6.
Absolute Maximum ambient operating temperature means the
device will not be damaged if operated under these conditions. It
does not guarantee performance.
PWD is defined as | tPHL - tPLH |. %PWD is equal to the PWD
divided by the pulse width.
tPSK is equal to the magnitude of the worst case difference in tPHL
and/or tPLH that will be seen between units at 25OC.
CMH is the maximum common mode voltage slew rate that can be
sustained while maintaining VO > 0.8 VDD2. CML is 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.
Device is considered a two terminal device:
pins 1-4 shorted and pins 5-8 shorted.
Dynamic current is consumed on the VDD1 supply only.
3
NVE Corporation
11409 Valley View Road
Eden Prairie, MN 55344-3617 USA
Telephone: (952) 829-9217
IL710T
ISOLOOP®
Application Notes:
Dynamic Power Consumption
Data Transmission Rates
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. 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 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.
The maximum power supply current per channel for
IsoLoop® is:
PWD% = Maximum Pulse Width Distortion (ns)
Signal Pulse Width (ns)
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:
x 100%
For example: For data rates of 12.5 Mb
PWD% =
Power Supply Decoupling
Both power supplies to these devices should be decoupled with
low ESR 100 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.
3 ns
80 ns
x 100% = 3.75%
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.
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.
4
NVE Corporation
11409 Valley View Road
Eden Prairie, MN 55344-3617 USA
Telephone: (952) 829-9217
Fax: (952) 829-9189
Internet: www.isoloop.com
IL710T
ISOLOOP®
Applications
Isolated PROFIBUS / RS-485
RS-485 Truth Table
TXD
1
0
1
0
RTS
0
0
1
1
A
Z
Z
1
0
B
Z
Z
0
1
RXD
X
X
1
0
Reference 485 Drivers (Texas Instruments)
65ALS176 (-40°C to +85°C)
75ALS176 (0°C to +70°)
VDD1 and VISO should be decoupled with 10 nF
capacitors at IL710 supply pins
5
NVE Corporation
11409 Valley View Road
Eden Prairie, MN 55344-3617 USA
Telephone: (952) 829-9217
Fax: (952) 829-9189
Internet: www.isoloop.com
IL710T
ISOLOOP®
Pin Configuration
Truth Table
VI
L
H
L
H
VOE
L
L
H
H
VO
L
H
Z
Z
Timing Diagram
Legend
tPLH
tPHL
tPW
tPLZ
tPZH
tPHZ
tPZL
tR
tF
Propagation Delay, Low to High
Propagation Delay, High to Low
Minimum Pulse Width
Propagation Delay, Low to High Impedance
Propagation Delay, High Impedance to High
Propagation Delay, High to High Impedance
Propagation Delay, High Impedance to Low
Rise Time
Fall Time
IR Soldering Profile
Recommended profile shown. Maximum
temperature allowed on any profile is 260° C.
6
NVE Corporation
11409 Valley View Road
Eden Prairie, MN 55344-3617 USA
Telephone: (952) 829-9217
Fax: (952) 829-9189
Internet: www.isoloop.com
IL710T
ISOLOOP®
IL710-2 (8-Pin PDIP Package)
IL710-3 (Small Outline SOIC-8 package)
Ordering Information: use the following format to order these devices
IL 710 T -2 TR7
Bulk Package
Blank = Tube
TR7 = 7’’ Tape and Reel
TR13 = 13’’ Tape and Reel
Package
-2 = PDIP
-3 = SOIC (0.15’’)
Valid Part Numbers
IL 710T-2
IL 710T-3
IL 710T-3TR13
IL 710T-3TR7
Temperature
T = -40°C to +125°C
Base Part Number
710 = 1 drive channel
Product Family
IL = Isolators
7
NVE Corporation
11409 Valley View Road
Eden Prairie, MN 55344-3617 USA
Telephone: (952) 829-9217
Fax: (952) 829-9189
Internet: www.isoloop.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.
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: [email protected]
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-IL710T-A
October 2002