IL3522
High Speed Isolated RS485/RS422 Transceiver
Functional Diagram
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
DE
ISODE
Y
Z
A
B
D
R
RE
IL3522
40 Mbps data rate
20 ns propagation delay
1 ns pulse skew
6 kV
RMS
Reinforced Isolation
/
12.8 kV surge
/
1 kV
RMS
WV (V-Series)
50 kV/μs typ.; 30 kV/μs min. common mode transient immunity
3 V to 5 V power supplies
44000 year barrier life
15 kV bus ESD protection
Low EMC footprint
Thermal shutdown protection
−40°C
to +85°C temperature range
VDE V 0884-10 certified; UL 1577 recognized
16-pin JEDEC-standard True 8™ mm SOIC packages
Applications
IL3522 Receiver
RE
H
L
L
L
R
Z
H
L
H
V
(A−B)
X
≥
200 mV
≤−200
mV
Open
IL3522 Driver
DE
L
H
H
D
X
H
L
V
(Y−Z)
Z
≥
200 mV
≤−200
mV
•
•
•
•
•
Factory automation
Industrial control networks
Building environmental controls
Equipment covered under IEC 61010-1 Edition 3
5 kV
RMS
rated IEC 60601-1 medical applications
Description
The IL3522 is a galvanically isolated, high-speed differential bus
transceiver, designed for bidirectional data communication on
balanced transmission lines. The device uses NVE’s patented*
IsoLoop spintronic Giant Magnetoresistance (GMR) technology.
A unique ceramic/polymer composite barrier provides excellent
isolation and virtually unlimited barrier life.
The IL3522 delivers an exceptional 2.3 V differential output into a
54
Ω
load over the supply range of 4.5 V to 5.5 V. This provides
better data integrity over longer cable lengths, even at data rates as
high as 40 Mbps. The device is also compatible with 3 V supplies,
allowing interface to standard microcontrollers without additional
level shifting.
Current limiting and thermal shutdown features protect against
output short circuits and bus contention that may cause excessive
power dissipation. Receiver inputs feature a “fail-safe if open”
design, ensuring a logic high R-output if A/B are floating.
H = High Level, L = Low Level
X = Irrelevant, Z = High Impedance
IsoLoop
®
is a registered trademark of NVE Corporation.
*U.S. Patent number 5,831,426; 6,300,617 and others.
REV. S
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
Fax: (952) 829-9189
www.IsoLoop.com
©NVE Corporation
IL3522
Absolute Maximum Ratings
(11)
Parameters
Storage Temperature
Ambient Operating Temperature
Voltage Range at any Bus Pin
Supply Voltage
(1)
Digital Input Voltage
Digital Output Voltage
ESD (all bus nodes)
Symbol
T
S
T
A
V
DD
1
, V
DD
2
Min.
−55
−40
−7
−0.5
−0.5
−0.5
15
Typ.
Max.
150
85
12
7
V
DD
+ 0.5
V
DD
+ 1
Units
°C
°C
V
V
V
V
kV
Test Conditions
HBM
Recommended Operating Conditions
Parameters
Supply Voltage
Input Voltage at any Bus Terminal
(separately or common mode)
High-Level Digital Input Voltage
Low-Level Digital Input Voltage
Differential Input Voltage
(2)
High-Level Output Current (Driver)
High-Level Digital Output Current
(Receiver)
Low-Level Output Current (Driver)
Low-Level Digital Output Current
(Receiver)
Ambient Operating Temperature
Digital Input Signal Rise and Fall
Times
Symbol
V
DD
1
V
DD
2
V
I
V
IC
V
IH
V
IL
V
ID
I
OH
I
OH
I
OL
I
OL
T
A
t
IR
, t
IF
−60
−8
−40
85
DC Stable
Min.
3.0
4.5
2.4
3.0
0
Typ.
Max.
5.5
5.5
12
−7
V
DD
1
0.8
+12/−7
60
8
Units
V
V
V
V
V
mA
mA
mA
mA
°C
V
DD
1
= 3.3 V
V
DD
1
= 5.0 V
Test Conditions
2
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
Fax: (952) 829-9189
www.IsoLoop.com
©NVE Corporation
IL3522
Insulation Specifications
Parameters
Creepage Distance (external)
Total Barrier Thickness (internal)
Barrier Resistance
Barrier Capacitance
Leakage Current
Comparative Tracking Index
High Voltage Endurance
AC
(Maximum Barrier Voltage
for Indefinite Life)
DC
Surge Immunity (“V” Versions)
Barrier Life
Symbol
R
IO
C
IO
CTI
V
IO
V
IOSM
≥600
1000
1500
12.8
44000
Min.
8.03
0.013
Typ.
8.3
0.016
>10
14
7
0.2
Max.
Units
mm
mm
Ω
pF
μA
RMS
V
RMS
V
RMS
V
DC
kV
PK
Years
Test Conditions
Per IEC 60601
500 V
f = 1 MHz
240 V
RMS
, 60 Hz
Per IEC 60112
At maximum
operating temperature
Per IEC 61000-4-5
100°C, 1000 V
RMS
, 60%
CL activation energy
Safety and Approvals
VDE V 0884-10
(VDE V 0884-11 pending)
V-Series (Reinforced Isolation; VDE File Number 5016933-4880-0002)
•
Working Voltage (V
IORM
) 1000 V
RMS
(1415 V
PK
); reinforced insulation; pollution degree 2
•
Isolation voltage (V
ISO
) 6000 V
RMS
•
Surge immunity (V
IOSM
) 12.8 kV
PK
•
Surge rating 8 kV
•
Transient overvoltage (V
IOTM
) 6000 V
PK
•
Each part tested at 2387 V
PK
for 1 second, 5 pC partial discharge limit
•
Samples tested at 6000 V
PK
for 60 sec.; then 2122 V
PK
for 10 sec. with 5 pC partial discharge limit
Standard versions (Basic Isolation; VDE File Number 5016933-4880-0001)
•
Working Voltage (V
IORM
) 600 V
RMS
(848 V
PK
); basic insulation; pollution degree 2
•
Isolation voltage (V
ISO
) 2500 V
RMS
•
Transient overvoltage (V
IOTM
) 4000 V
PK
•
Surge rating 4000 V
•
Each part tested at 1590 V
PK
for 1 second, 5 pC partial discharge limit
•
Samples tested at 4000 V
PK
for 60 sec.; then 1358 V
PK
for 10 sec. with 5 pC partial discharge limit
Safety-Limiting Values
Safety rating ambient temperature
Safety rating power (180°C)
Supply current safety rating (total of supplies)
Symbol
T
S
P
S
I
S
Value
180
270
54
Units
°C
mW
mA
IEC 61010-1
(Edition 2; TUV Certificate Numbers N1502812; N1502812-101)
Reinforced Insulation; Pollution Degree II; Material Group III
Part No. Suffix
-3
None
Package
SOIC
Wide-body SOIC/True 8™
Working Voltage
150 V
RMS
300 V
RMS
UL 1577
(Component Recognition Program File Number E207481)
Standard isolation grade
Each part tested at 3000 V
RMS
(4243 V
PK
) for 1 second; each lot sample tested at 2500 V
RMS
(3536 V
PK
) for 1 minute
V-Series isolation grade
6 kV rating; tested at 7.2 kV
RMS
(10.2 kV
PK
) for 1 second; each lot sample tested at 6 kV
RMS
(8485 V
PK
) for 1 minute
Soldering Profile
Per JEDEC J-STD-020C, MSL 1
3
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
Fax: (952) 829-9189
www.IsoLoop.com
©NVE Corporation
IL3522
IL3522 Pin Connections
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
V
DD1
GND
1
R
RE
DE
D
NC
GND
1
GND
2
ISODE
Y
Z
B
A
GND
2
V
DD2
Input Power Supply
Input Power Supply Ground Return
(pin 2 is internally connected to pin 8)
Output Data from Bus
Read Data Enable
(if RE is high, R = high impedance)
Drive Enable
Data Input to Bus
No Internal Connection
Input Power Supply Ground Return
(pin 8 is internally connected to pin 2)
Output Power Supply Ground Return
(pin 9 is internally connected to pin 15)
Isolated DE Output for use in Profibus
applications where the state of the isolated
drive enable node needs to be monitored
Y Bus (Drive – True)
Z Bus (Drive – Inverse)
B Bus (Receive – Inverse)
A Bus (Receive – True)
Output Power Supply Ground Return
(pin 15 is internally connected to pin 9)
Output Power Supply
VDD
1
GND
1
R
RE
DE
D
NC
GND
1
VDD
2
GND
2
A
B
Z
Y
ISODE
GND
2
IL3522
4
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
Fax: (952) 829-9189
www.IsoLoop.com
©NVE Corporation
IL3522
Driver Section
Electrical Specifications are T
min
to T
max
and V
DD
= 4.5 V to 5.5 V, unless otherwise stated.
Typ.
(5)
Parameters
Symbol
Min.
Input Clamp Voltage
V
IK
Output voltage
V
O
(12)
Differential Output Voltage
|V
OD
1
|
(12)
Differential Output Voltage
|V
OD
2
|
2.5
3
Differential Output Voltage
(12, 6)
V
OD
3
2.3
Change in Magnitude of Differential
Δ|V
OD
|
Output Voltage
(7)
Common Mode Output Voltage
V
OC
Change in Magnitude of Common
Δ|V
OC
|
Mode Output Voltage
(7)
Output Current
(4)
High Level Input Current
Low Level Input Current
Absolute |Short-circuit Output
Current|
V
DD
1
= +5 V
Supply Current
V
DD
1
= +3.3 V
I
O
I
IH
I
IL
I
OS
I
DD
1
I
DD
1
4
3
Max.
−1.5
V
DD
V
DD
5
5
±0.2
3
±0.2
1
−0.8
10
−10
250
6
4
Units
V
V
V
V
V
V
V
V
mA
μA
μA
mA
mA
Test Conditions
I
L
=
−18
mA
I
O
= 0
I
O
= 0
R
L
= 54
Ω,
V
DD
= 5 V
R
L
= 54
Ω,
V
DD
= 4.5 V
R
L
= 54
Ω
or 100
Ω
R
L
= 54
Ω
or 100
Ω
R
L
= 54
Ω
or 100
Ω
Output Disabled,
V
O
= 12
V
O
=
−7
V
I
= 3.5 V
V
I
= 0.4 V
−7
V > V
O
< 12 V
No Load
(Outputs Enabled)
Notes
(apply to both driver and receiver sections):
1.
2.
3.
4.
5.
6.
7.
8.
9.
All voltages are with respect to network ground except differential I/O bus voltages.
Differential input voltage is measured at the noninverting terminal A with respect to the inverting terminal B.
Skew limit is the maximum propagation delay difference between any two devices at 25°C.
The power-off measurement in ANSI Standard EIA/TIA-422-B applies to disabled outputs only and is not applied to combined inputs and
outputs.
All typical values are at V
DD
1
,V
DD
2
= 5 V or V
DD
1
= 3.3 V and T
A
= 25°C.
−7
V < V
CM
< 12 V; 4.5 V < V
DD
< 5.5 V.
Δ|V
OD
| and
Δ|V
OC
| are the changes in magnitude of V
OD
and V
OC
, respectively, that occur when the input is changed from one logic state to
the other.
This applies for both power on and power off, refer to ANSI standard RS-485 for exact condition. The EIA/TIA-422-B limit does not apply
for a combined driver and receiver terminal.
Includes 10 ns read enable time. Maximum propagation delay is 25 ns after read assertion.
10. Pulse skew is defined as |t
PLH
– t
PHL
| of each channel.
11. Absolute Maximum specifications mean the device will not be damaged if operated under these conditions. It does not guarantee
performance.
12. Differential output voltage is measured at terminal Y with respect to Z.
13. The relevant test and measurement methods are given in the Electromagnetic Compatibility section on p. 6.
14. External magnetic field immunity is improved by this factor if the field direction is “end-to-end” rather than to “pin-to-pin” (see diagram on p. 6).
5
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
Fax: (952) 829-9189
www.IsoLoop.com
©NVE Corporation
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