ic-we iC-Haus, ic-we Datasheet

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ic-we

Manufacturer Part Number
ic-we
Description
3-channel 75 ? Line Driver
Manufacturer
iC-Haus
Datasheet
iC-WE
3-CHANNEL 75 Ω LINE DRIVER
FEATURES
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BLOCK DIAGRAM
Copyright © 2003, iC-Haus
3 current-limited and short-circuit-proof push-pull drivers
Built-in adaption to 75 Ω characteristic impedance
High driver current of 300 mA at 24 V typ.
Low saturation voltage up to 30 mA load current
Short switching times and high slew rates by npn circuitry
Wide driver supply range VB = 4.5 V to 30 V
Internal free-wheeling diodes to VB and GND
Schmitt trigger inputs with integrated pull-up current sources
Inputs compatible to TTL and CMOS
Inverting and non-inverting driver mode
Bus capability due to Tri-State switching
Compatible to EIA standard RS-422
Thermal shutdown with hysteresis
Short-circuit-proof OC error output reports thermal shutdown
or undervoltage at VCC or VB
Driver disabled in case of fault
extended temperature range of up to 130 °C in
TSSOP20tp 4.4 mm package
10
20
19
8
9
1
TNER
TRI
INV
E1
E2
E3
MODE
CHAN 1
CHAN 2
CHAN 3
SO20
iC-WE
ERROR
GND
LOW VOLTAGE
VCC
T.SHUTDOWN
4-7,14-17
2
VB
12
APPLICATIONS
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PACKAGES
NER
A1
A2
A3
24 V signal transfer
Line driver in PLC environment
SO16W
SO20
3
11
13
18
Rev D1, Page 1/10
www.ichaus.com
TSSOP20
thermal pad

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ic-we Summary of contents

Page 1

... TSSOP20tp 4.4 mm package BLOCK DIAGRAM Copyright © 2003, iC-Haus 2 VCC VB MODE ERROR TNER TRI LOW VOLTAGE INV T.SHUTDOWN iC-WE SO20 E1 CHAN 1 E2 CHAN 2 E3 CHAN 3 GND 4-7,14-17 Rev D1, Page 1/10 APPLICATIONS 24 V signal transfer Ë Line driver in PLC environment Ë PACKAGES SO20 TSSOP20 ...

Page 2

... The NER output which is constructed as an open collector and is also short-circuit proof reports the fault via the connected line. The error input TNER can be linked to message outputs of other ICs and allows iC-WE to report a system fault message. If the supply voltage VCC cancels, NER becomes highly resistive. ...

Page 3

... All currents into the device pins are positive; all currents out of the device pins are negative. Conditions Fig. MIL-STD-883, Method 3015, HBM 100 pF discharged through 1.5 kΩ Conditions Fig. iC-WE SO16W iC-WE SO20, iC-WE TSSOP20 2 surface mounted with ca heat sink at leads (see Demo Board) 2 surface mounted with ca heat ...

Page 4

... LINE DRIVER ELECTRICAL CHARACTERISTICS Operating Conditions 4.5..30 V, VCC = 5 V ± -40..125 °C, unless otherwise noted Item Symbol Parameter Total Device 001 VCC Permissible Supply Voltage Range 002 I(VCC) Supply Current in VCC 003 VB Permissible Driver Supply Voltage Range 004 I(VB)lo ...

Page 5

... LINE DRIVER ELECTRICAL CHARACTERISTICS Operating Conditions 4.5..30 V, VCC = 5 V ± -40..125 °C, unless otherwise noted Item Symbol Parameter Inputs E1..3 (continued) 204 Ipu() Pull-Up Current 205 Vc()hi Clamp Voltage hi 206 Vc()lo Clamp Voltage lo 207 tp(E-A) Propagation Delay E6 A 208 ∆tp()INV Delay Skew E6 A for INV = lo vs ...

Page 6

... A mismatch between the iC-WE and the line influences the level of the initially injected wave and produces reflections at the driver end. The output signal may have a number of graduations. Nonetheless, lines with characteristic impedances in the range 40 to 150 Ω ...

Page 7

... CHAN3 Fig. 4: Balanced data transmission EXAMPLE 2: Incremental encoder Fig. 5 shows the iC-WE being used in an optical encoder system together with the iC-Haus incremental encoder iC-WT. The iC-WT device is an evaluating IC for photodiode arrays used in incremental lengths and angle measuring systems. It preprocesses the sensor signals for transmission with line driver iC-WE. At the receive end the programmable logic controller (PLC) interface can be via optocoupler ...

Page 8

... LINE DRIVER The error input TNER on the iC-WE can be utilized to conduct a fault signal from the incremental encoder to the output NER and then to the receiver. For protection against voltage peaks from the cable, the state input TRI is wired to the RC combination R1, R2 and C5, which can be dimensioned for levels the PLC ...

Page 9

... LINE DRIVER DEMO BOARD The device iC-WE with SO20 package is equipped with a Demo Board for test purposes. Figures show the wiring as well as the top and bottom layout of the test PCB. VB C02 1µF/40V VCC C01 1µF/16V 10 MODE TNER ...

Page 10

... Package iC-WE SO20 SO16W TSSOP20tp 4 Demo Board For information about prices, terms of delivery, options for other case types, etc., please contact: iC-Haus GmbH Am Kuemmerling 18 D-55294 Bodenheim GERMANY Order designation iC-WE SO20 iC-WE SO16W iC-WE TSSOP20 WE DEMO Tel +49-6135-9292-0 Fax +49-6135-9292-192 http://www.ichaus.com Rev D1, Page 10/10 ...

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