RS422数字隔离器IL422

mA
mA
85
°C
kV/μs
DC Stable
Test Conditions
VDD1 = 3.3 V VDD1 = 5.0 V
Insulation Specifications
Parameters Creepage Distance Barrier Impedance Leakage Current
Safetyy or common mode)
VIC
High-Level Digital Input Voltage
VIH
Low-Level Digital Input Voltage
VIL
Differential Input Voltage(2)
VID
High-Level Output Current (Driver)
IL422
Driver Section
Electrical specifications are Tmin to Tmax and VDD = 4.5 V to 5.5 V unless otherwise stated.
Parameters
Symbol
Min.
Typ.(5)
Input Clamp Voltage
Units °C °C V V V V
mW
mA °C kV
Test Conditions
25°C 85°C 10 sec. HBM
Recommended Operating Conditions
Parameters
Symbol
Supply Voltage
VDD1 VDD2
Input Voltage at any Bus Terminal
Output voltage Differential Output Voltage(2) Differential Output Voltage(2) Differential Output Voltage(2)(6)
Change in Magnitude of Differential Output Voltage(7)
High Level Input Current Low Level Input Current
VOC
Δ|VOC|
IO IIH IIL
Short-circuit Output Current
IOS
Supply Current
VDD1 = +5 V VDD1 = +3.3 V
Parameters Maximum Data Rate Differential Output Prop Delay Pulse Skew(10) Differential Output Rise & Fall Time Output Enable Time to High Level Output Enable Time to Low Level Output Disable Time from High Level Output Disable Time from Low Level Skew Limit(3)
10
ISODE applications where the state of the isolated
drive enable node needs to be monitored
11
Y
Y Bus (Drive – True)
12
Z
Z Bus (Drive – Inverse)
13
B
B Bus (Receive – Inverse)
IOH
High-Level Digital Output Current (Receiver)
IOH
Low-Level Output Current (Driver)
IOL
Low-Level Digital Output Current (Receiver)
IOL
Ambient Operating Temperature
ITU Recommended V11 • Low EMC Footprint • −40°C to +85°C Temperature Range • PROFIBUS International Component Recognition • 16-pin SOIC Package • UL1577 and IEC 61010-2001 Approved
The IL422 has current limiting and thermal shutdown features to protect against output short circuits and bus contention situations that could cause excessive power dissipation.
14
A
A Bus (Receive – True)
15
GND2 Output Power Supply Ground Return*
16
VDD2 Output Power Supply
*NOTE: Pins 2 and 8 are internally connected, as are pins 9 and 15.
5
DE Drive Enable
6
D
Data Input to Bus
7
NC No Internal Connection
8
GND1 Input Power Supply Ground Return*
9
GND2 Output Power Supply Ground Return*
Isolated DE Output for use in Profibus
Model
Package
IL422
0.3" SOIC
Pollution Degree II
UL 1577
Component Recognition Pprogram File Number: E207481 Rated 2500VRMS for 1 minute
Soldering Profile
Per JEDEC J-STD-020C, MSL=2
Applications
Multi-point or multi-drop transmission on long bus lines in noisy environments.
Description
The IL422 is a galvanically isolated, high-speed differential bus transceiver, designed for bidirectional data communication on balanced transmission lines. The devices use NVE’s patented* IsoLoop spintronic Giant Magnetoresistance (GMR) technology. The IL422 is the first isolated RS-422 interface in a standard 16-pin SOIC package that meets the ANSI Standards EIA/TIA-422-B and RS-485 and is compatible with 3.3V input supplies.
IL422
Isolated RS422/RS485 Interface
Functional Diagram
DE
ISODE
D
Y
Z
R
A
B
RE
IL422
IL422 Receiver
RE R HZ
V(A−B) X
L H ≥ 200 mV
L L ≤−200 mV
L
I
Open
IL422 Driver
DE D LX HH HL
Isoloop is a registered trademark of NVE Corporation. *U.S. Patent number 5,831,426; 6,300,617 and others.
REV. Q
NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 Fax: (952) 829-9189 ©NVE Corporation
IL422
VDD1 GND1
R
RE
DE D
NC GND1
IL422
VDD2 GND2 A B Z Y ISODE GND2
3
NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax (952) 829-9189 Internet:
Continuous Total Power Dissipation
Maximum Output Current Lead Solder Temperature ESD
Symbol TS TA
VDD1, VDD2
IO
Min. −65 −40 −7 −0.5 −0.5 −0.5
Typ. 2
Max. 150 100 12 7 5.5 VDD + 1 725 377 95 260
Material Group III
Max. Working Voltage 300 VRMS