DC1747A-A Linear Technology, DC1747A-A Datasheet

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DC1747A-A

Manufacturer Part Number
DC1747A-A
Description
EVALUATION LOW EM1 KIT LTM2882-3
Manufacturer
Linear Technology
Series
µModuler
Datasheets

Specifications of DC1747A-A

Main Purpose
Interface, Transceiver RS-232
Embedded
No
Utilized Ic / Part
LTM2882
Primary Attributes
3V Supply, Dual, Isolated, Transceiver + Power
Kit Contents
Board, Datasheet
Tool / Board Applications
Interface-Backplane, PCI, PCI Express, RS-XXX, Digital & Opto Isolator
Mcu Supported Families
LTM2882
Development Tool Type
Hardware - Eval/Demo Board
Lead Free Status / RoHS Status
Not applicable / Not applicable
Secondary Attributes
-
DESCRIPTION
Demonstration circuit 1747A is a dual isolated RS232
μModule
the LTM
nel, 2500V
interface. The demo circuit features an EMI optimized
circuit confi guration and printed circuit board layout. All
components are integrated into the μModule transceiver.
The demo circuit operates from a single external supply
PERFORMANCE SUMMARY
SYMBOL
V
V
f
V
OPERATING PRINCIPLES
The LTM2882 contains an isolated DC/DC converter de-
livering power to V
Isolation is maintained by the separation of GND and GND2
where signifi cant operating voltages and transients can
exist without affecting the operation of the LTM2882. The
logic side ON pin enables or shuts down the LTM2882.
RS232 signaling is controlled by the logic inputs T1IN,
T2IN and DE. Connection to the transceiver pins, R1IN-
T1OUT or R2IN-T2OUT, permits RS232 communication on
the isolated side of the demo circuit. The circuit features
two channels, supporting multiple RS232 channels or
the addition of fl ow control on a single RS232 interface.
MAX
CC
CC2
IORM
®
®
2882. The demo circuit provides a 2-chan-
transceiver with integrated power featuring
RMS
PARAMETER
Input Supply Range
Output Voltage
Maximum Data Rate
Maximum Working Insulation Voltage
Common Mode Transient Immunity
, galvanically isolated RS232 transceiver
CC2
at 5V from the input supply V
(T
CONDITIONS
LTM2882−5
LTM2882−3
LTM2882-5 I
LTM2882-3 I
R
R
R
GND to GND2
L
L
L
A
= 3k, C
= 3k, C
= 3k, C
= 25°C)
CC
µModule Transceiver + Power
L
L
L
= 2.5nF
= 1nF
= 250pF
.
LOAD
LOAD
= 150mA
= 100mA
on V
communicates all necessary signaling across the isola-
tion barrier using Linear Technology’s isolator μModule
technology.
Design fi les for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology, the Linear logo and μModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
The spare logic channel, DIN to DOUT, is confi gured to
control the state of the driver outputs, T1OUT and T2OUT,
by connecting DOUT to DE.
Data is transmitted out the driver pins T1OUT and T2OUT
from the inputs T1IN and T2IN with the input DE set to
ON. Data is received through the receiver pins R1IN and
R2IN to the outputs R1OUT and R2OUT; receivers are
always active.
The demo circuit has been designed and optimized for low
RF emissions. To this end, some features of the LTM2882
are not available for evaluation on the demo circuit.
DEMO MANUAL DC1747A
CC
. The part generates the output voltage V
Dual Isolated RS232
1000
MIN
100
250
560
400
4.5
3.0
4.7
4.7
30
TYP
5
3
5
5
LTM2882:
MAX
5.5
3.6
CC2
dc1747af
UNITS
kV/μs
V
1
and
kbps
kbps
kbps
RMS
V
DC
V
V
V
V

Related parts for DC1747A-A

DC1747A-A Summary of contents

Page 1

... T1OUT or R2IN-T2OUT, permits RS232 communication on the isolated side of the demo circuit. The circuit features two channels, supporting multiple RS232 channels or the addition of fl ow control on a single RS232 interface. DEMO MANUAL DC1747A Dual Isolated RS232 µModule Transceiver + Power The part generates the output voltage V ...

Page 2

... IEC 61000-4-20, “Testing and Mea- surement Techniques – Emission and Immunity Testing in Transverse Electromagnetic Waveguides.” 60 DETECTOR = QuasiPeak 120kHz 300kHz, SWEEP TIME = 17s 50 BW NUMBER OF POINTS = 501 –10 CISPR 22 CLASS B LIMIT DC1747A-B –20 DC1747A-A – FREQUENCY (MHz) DC1747A F01 Figure 1.DC1747A Radiated Emissions dc1747af ...

Page 3

... GND on pin header J1. 4. Turn on the power at the input. NOTE: Make sure that the input voltage does not exceed 6V. DEMO MANUAL DC1747A 5. Check for the proper output voltage. V can be measured between probe point V2 to G2. 6. Once the proper output voltages are established, con- nect a standard 9-Pin RS232 cable between J2 on the demo board and a computer ...

Page 4

... DEMO MANUAL DC1747A PCB LAYOUT Layer 1. Top Layer Layer 3. Signal Layer PARTS LIST ITEM QTY REFERENCE DESCRIPTION Required Circuit Components I.C., LTM2882CY-3 I.C., LTM2882CY-5 Hardware/Components (For Demo Board Only C1, C5 CAP , TANT 10F 10V 20% TAJA CAP , CER 1F 10V 20% 0508 4 2 C3, C4 CAP , CER 470pF 250V 0.1" ...

Page 5

... SCHEMATIC DIAGRAM DEMO MANUAL DC1747A dc1747af 5 ...

Page 6

... DEMO MANUAL DC1747A Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods ...

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