il3122 NVE Corp., il3122 Datasheet

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il3122

Manufacturer Part Number
il3122
Description
Low Cost Rs-485 And Rs-422 Isolated Transceivers
Manufacturer
NVE Corp.
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
il3122-3E
Manufacturer:
NVE
Quantity:
50
Part Number:
il3122E
Manufacturer:
LT
Quantity:
154
Functional Diagrams
IL3185 Truth Table
Z = High Impedance
Selection Table
IsoLoop
*U.S. Patent number 5,831,426; 6,300,617 and others.
IL3122 Receiver
IL3185
IL3122
≤−200 mV
≤−200 mV
Model
≥ 200 mV
≥ 200 mV
NVE Corporation
RE
H
L
L
L
V
Open
(A-B)
X
®
is a registered trademark of NVE Corporation.
Full/Half
R
H
H
Z
L
Duplex
V
V
Low Cost RS-485 and RS-422 Isolated Transceivers
half
full
COIL1
COIL1
DE
RE
DE
RE
DE
D
D
R
R
H
H
X
L
L
L
11409 Valley View Road, Eden Prairie, MN 55344-3617
≤−200 mV
≥ 200 mV
IL3185
IL3122
V
Open
X = Irrelevant
(A-B)
X
Allowed on Bus
No. of Devices
D
H
X
X
X
X
L
32
32
R
H
H
Z
H
L
L
IL3122 Driver
DE
L
H
H
RE
H
L
L
L
L
L
Data Rate
Mbps
D
X
H
L
5
5
V
A
B
Y
Z
V
A
B
Receive
Receive
Receive
COIL2
COIL2
Mode
Drive
Drive
X
≤−200 mV
≥ 200 mV
V
Fail-Safe
(Y-Z)
Z
yes
yes
Phone: (952) 829-9217
Features
Applications
Description
The IL3185 and IL3122 are galvanically isolated, differential
bus transceivers designed for bidirectional data
communication over balanced transmission lines. The devices
use NVE’s patented* IsoLoop spintronic Giant
Magnetoresistance (GMR) technology. The IL3185 delivers at
least 1.5 V into a 54 Ω load, and the IL3122 at least 2 V into a
100 Ω load, allowing excellent data integrity over long cables.
These devices are also compatible with 3.3 V input supplies,
allowing interface to standard microcontrollers without
additional level shifting.
Both the IL3185 and IL3122 have current limiting and
thermal shutdown features to protect against output short
circuits and bus contentions that may cause excessive power
dissipation. The receivers also incorporate a “fail-safe if open”
design, ensuring a logic high on R if the bus lines are
disconnected or “floating.”
A 16 pF capacitor (C
the current limit resistor to ensure the full specified
performance.
3.3 V / 5 V Input Supply Compatible
5 Mbps Data Rate
Supports Up to 32 Nodes
±15 kV ESD Protection
2500 V
20 kV/µs Typical Common Mode Rejection
Thermal Shutdown Protection
−40°C to +85°C Temperature Range
IEC 61010-2001 Approval
UL1577 Approval (pending)
0.15" or 0.3" 16-pin SOIC Packages
P.O.S. Systems
Security Networks
Building Environmental Controls
Industrial Control Networks
Gaming Systems
Factory Automation
Fax: (952) 829-9189
RMS
Isolation (1 minute)
Boost
www.IsoLoop.com
; see page 9) must be placed across
IL3185/IL3122
©2008 NVE Corporation
REV. G

Related parts for il3122

il3122 Summary of contents

Page 1

... NVE’s patented* IsoLoop spintronic Giant L Drive Magnetoresistance (GMR) technology. The IL3185 delivers at L Drive least 1.5 V into a 54 Ω load, and the IL3122 at least 2 V into a L Receive 100 Ω load, allowing excellent data integrity over long cables. L Receive These devices are also compatible with 3.3 V input supplies, ...

Page 2

... Creepage Distance (external) Barrier Impedance Leakage Current Safety Approvals IEC61010-2001 TUV Certificate Numbers: N1502812, N1502812-101 Classification: Reinforced Insulation IL3122E, IL3185E, IL3122-3E, IL3185-3E UL 1577 Rated 2500 V for 1 minute RMS Component Recognition Program File Number: E207481 Soldering Profile Per JEDEC J-STD-020C, MSL=2 Electrostatic Discharge Sensitivity This product has been tested for electrostatic sensitivity to the limits stated in the specifications ...

Page 3

... B Inverting bus line internal connection 15 GND Ground return for Coil for R (connect to V COIL2 IL3122-3 Pin Connections (0.15" SOIC Package Input power supply DD1 2 GND Ground return for Output data from bus 3 Read enable 4 RE ...

Page 4

... Inverting bus line internal connection 15 GND Ground return for Coil for R (connect to V COIL2 IL3122 Pin Connections (0.3" SOIC Package Input power supply DD1 2 GND Ground return for Output data from bus Read enable ...

Page 5

... PZH t 25 PZL t 25 PHZ t 25 PLZ t (LIM) SK |CM |,| Phone: (952) 829-9217 Fax: (952) 829-9189 IL3185/IL3122 Max. Units Test Conditions T = 25°C Ω||nH AMB Ω/° 100 Ω ...

Page 6

... A with a 54 Ω load is either ½ 1.5 V, whichever is greater. OD2 OD1 and V , respectively, that occur when the input is changed from one logic state to the other Phone: (952) 829-9217 IL3185/IL3122 Max. Units Test Conditions T = 25°C Ω||nH AMB Ω/°C ...

Page 7

... DD2 Operation The IL3122 and IL3185 are current-mode devices. Changes in input coil current switch internal spintronic GMR sensors, which then change the logic state of the outputs. The GMR bridge is designed so the output of the isolator is logic high when no field signal is present. ...

Page 8

... A DC current flowing in a conductor ±70 Gauss 1 cm from the device could cause disturbance A DC current of 200 A flowing in a conductor ±250 Gauss 1 cm from the device could cause disturbance 8 Phone: (952) 829-9217 Fax: (952) 829-9189 IL3185/IL3122 www.IsoLoop.com ©2008 NVE Corporation ...

Page 9

... In RS-422 systems only the receiver end should be terminated. Unterminated Proper termination is imperative when using IL3185 and IL3122 to minimize reflections. Unterminated lines are only suitable for very low data rates and very short cable runs, otherwise line reflections cause problems. Parallel terminations are the most popular. ...

Page 10

... Unit Loads (12 kΩ each), without external fail Nominal V Fail-Safe A-B Operation? Loading (inactive) 238 254 mV 247 mV 10 Phone: (952) 829-9217 IL3185/IL3122 ) at one end of the bus can FS-EXT Yes No Yes Yes Fax: (952) 829-9189 www.IsoLoop.com ©2008 NVE Corporation ; see FS-INT ...

Page 11

... Dimensions in inches (mm) 0.013 (0.3) 0.020 (0.5) 0.007 (0.2) 0.013 (0.3) 0.08 (2.0) 0.10 (2.5) NOTE: Pin spacing is a BASIC dimension; tolerances do not accumulate 11 Phone: (952) 829-9217 Fax: (952) 829-9189 IL3185/IL3122 NOM 0.054 (1.4) 0.072 (1.8) 0.004 (0.1) 0.012 (0.3) 0.287 (7.29) 0.300 (7.62) NOM 0.016 (0.4) 0.050 (1.3) 0.040 (1.0) 0.004 (0.1) 0.060 (1.5) 0.012 (0.3) www.IsoLoop.com © ...

Page 12

... SOIC Base Part Number 3185 = RS-485 Transceiver 3122 = RS-422 Transmitter/Receiver Product Family IL = Isolators 12 Phone: (952) 829-9217 Fax: (952) 829-9189 IL3185/IL3122 Valid Part Numbers IL3185E IL3185E TR13 IL3185-3E IL3185-3E TR13 IL3122E IL3122E TR13 IL3122-3E IL3122-3E TR13 RoHS COMPLIANT www.IsoLoop.com ©2008 NVE Corporation ...

Page 13

... Fail-safe biasing section added Narrow-body-SOIC packages added Capacitor Information added on page 1 Input Signal Rise/Fall times changed from 10 μs to 1μs Typical coil formations show C Boost Switching characteristics show C Boost 13 Phone: (952) 829-9217 Fax: (952) 829-9189 IL3185/IL3122 = 16 pF www.IsoLoop.com ©2008 NVE Corporation ...

Page 14

... President of NVE Corporation. Specifications are subject to change without notice. ISB-DS-001-IL3185/22-G February 2008 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 IL3185/IL3122 14 Phone: (952) 829-9217 Fax: (952) 829-9189 www.IsoLoop.com ©2008 NVE Corporation ...

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