il3285etr13 NVE Corp., il3285etr13 Datasheet

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il3285etr13

Manufacturer Part Number
il3285etr13
Description
Fractional Load Rs-485 And Rs-422 Isolated Transceivers
Manufacturer
NVE Corp.
Datasheet
Functional Diagrams
IL3285 Truth Table
Selection Table
IsoLoop
*U.S. Patent number 5,831,426; 6,300,617 and others.
IL 3222 Receiver
Z = High Impedance
≤−200 mV
≤−200 mV
IL3285
IL3222
≥ 200 mV
≥ 200 mV
Model
NVE Corporation
RE
H
L
L
L
V
Open
(A-B)
X
®
Fractional Load RS-485 and RS-422 Isolated Transceivers
is a registered trademark of NVE Corporation.
Full/Half
R
H
H
Z
L
V
V
Duplex
COIL1
COIL1
half
full
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
IL3285
IL3222
V
Open
(A-B)
X
X = Irrelevant
Allowed on Bus
No. of Devices
D
H
X
X
X
X
L
256
256
R
H
H
Z
H
L
L
IL3222 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
(Y-Z)
Fail-Safe
Z
yes
yes
Phone: (952) 829-9217
Features
Applications
Description
The IL3285 and IL3222 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 IL3285 delivers at
least 1.5 V into a 54 Ω load, and the IL3222 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 IL3285 and IL3222 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.”
Receiver input resistance of 96 kΩ is eight times the RS-485
“Unit Load” (UL) minimum of 12 kΩ. Thus these products
are known as “one-eighth UL” transceivers. There can be up
to 256 of these devices on a network while still complying
with the RS-485 loading specification.
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
⅛ Unit Load
±15 kV ESD Protection
2500 V
20 kV/µs Typical Common Mode Rejection
−40°C to +85°C Temperature Range
Thermal Shutdown Protection
IEC 61010-2001 Approval; UL1577 Approval Pending
0.15" or 0.3" 16-pin SOIC Packages
High Node-Count Networks
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
IL3285/IL3222
©2008 NVE Corporation
REV. H

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il3285etr13 Summary of contents

Page 1

Fractional Load RS-485 and RS-422 Isolated Transceivers Functional Diagrams DE V COIL1 IL3285 DE V COIL1 IL3222 IL3285 Truth Table (A-B) ≥ 200 ≤−200 mV H ...

Page 2

Absolute Maximum Ratings Operating at absolute maximum ratings will not damage the device. However, extended periods of operation at the absolute maximum ratings may affect performance and reliability. Parameters Storage Temperature Ambient Operating Temperature Voltage Range ...

Page 3

IL3285-3 Pin Connections (0.15" SOIC Package Input power supply DD1 2 GND Ground return for Output data from bus 3 Read enable high high impedance) DE Drive enable ...

Page 4

IL3285 Pin Connections (0.3" SOIC Package Input power supply DD1 2 GND Ground return for Output data from bus 3 Read enable high high impedance) DE Drive enable ...

Page 5

Driver Section Electrical specifications are unless otherwise stated. min max Parameters Coil Input Impedance Temperature Coefficient of Coil Resistance Output voltage Differential Output Voltage Differential Output Voltage (6) Differential Output Voltage (7) Change in Magnitude of Differential ...

Page 6

Receiver Section Electrical specifications are unless otherwise stated. min max Parameters Coil Input Impedance Temperature Coefficient of Coil Resistance Positive-going Input Threshold Negative-going Input Threshold − V Hysteresis Voltage (V ) it+ it− High Level Digital Output ...

Page 7

Power Supply Decoupling Both V and V must be bypassed with 47 nF ceramic capacitors. These should be placed as close as possible to V DD1 DD2 proper operation. Additionally, V should be bypassed with a 10 µF tantalum capacitor. ...

Page 8

Method Field applied in direction H1 Field applied in direction H2 Field applied in any direction but with field booster capacitor (1 nF) in circuit Table 1. Magnetic Immunity Data Rate and Magnetic Field Immunity It is easier to disrupt ...

Page 9

Cable Length (feet) 100 40 Figure 3. Cable Length vs. Data Rate (30% jitter). Terminations: Transmission lines should be terminated to avoid reflections that cause data errors. In RS-485 systems both ends of the bus, not every node, ...

Page 10

Fail-Safe Operation: “Fail-safe operation” is defined here as the forcing of a logic high state on the “R” output in response to an open-circuit condition between the “A” and “B” lines of the bus, or when no drivers are active ...

Page 11

Package Drawings, Dimensions and Specifications 0.15" 16-pin SOIC 0.386 (9.8) 0.394 (10.0) Pin 1 identified by either an indent or a marked dot 0.228 (5.8) 0.244 (6.2) 0.3" 16-pin SOIC 0.397 (10.1) 0.413 (10.5) Pin 1 identified by either an ...

Page 12

Ordering Information and Valid Part Numbers IL 3285 -3 E TR13 NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Bulk Packaging Blank = Tube TR13 = 13'' Tape and Reel Package E = RoHS Compliant Package Type Blank ...

Page 13

Revision History ISB-DS-001-IL3285/22-H Changes • February 2008 • ISB-DS-001-IL3285/22-G Changes • ISB-DS-001-IL3285/22-F Changes • ISB-DS-001-IL3285/22-E Changes • ISB-DS-001-IL3285/22-D Changes • • • ISB-DS-001-IL3285/22-C Changes ISB-DS-001-IL3285/22-B Revision A not released ISB-DS-001-IL3285/22-A Internal Release ONLY NVE Corporation 11409 ...

Page 14

About NVE An ISO 9001 Certified Company NVE Corporation manufactures innovative products based on unique spintronic Giant Magnetoresistive (GMR) technology. Products include Magnetic Field Sensors, Magnetic Field Gradient Sensors (Gradiometers), Digital Magnetic Field Sensors, Digital Signal Isolators, and Isolated Bus ...

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