782482 Series - Murata Power Solutions

782482 Series
www.murata-ps.com
ADM2482E/ADM2487E Compatible Converter Transformers
SELECTION GUIDE
Order Code
Nominal Input
Voltage
V
Nominal Output
Voltage
V
782482/33VC
3.3
3.3
4000
1CT:1.33CT
DIL
782482/53VC
5.0
3.3
4000
1.14CT:1CT
DIL
Isolation Voltage
Turns
Ratio
VDC
Package
Style
CHARACTERISTICS
Parameter
FEATURES
Conditions
1
P
1
L
RoHS compliant
Analog Devices ADM2482E/ADM2487E
compatible
Primary Inductance, L
Leakage Inductance, L
Interwinding Capacitance, CWW
Primary DC Resistance, RDC1
Volt-time Product, Et2
100kHz, 20mV
100kHz, 250mV
100kHz, 250mV
<0.1VDC
5kHz, 5V
782482/33VC
782482/53VC
Min.
190
Min.
150
13
Max.
310
8
8
600
Max.
260
8
8
600
13
Units
μH
μH
pF
mΩ
Vμs
4.0kVDC isolation
Industry-standard pinout
ABSOLUTE MAXIMUM RATINGS
Low profile
Operating free air temperature range
Storage temperature range
Isolation voltage (flash tested for 1 second)
Toroidal construction
SOLDERING INFORMATION3
Fully encapsulated
Peak wave solder temperature
260˚C for 10 seconds
Pin finish
Matte tin
UL 94 V-0 package materials
Industrial temperature range
Surface mount versions available soon
Recommended by Analog Devices, Inc.
Backward compatible with
Sn/Pb soldering systems
DESCRIPTION
The 782482 series of converter transformers are
specifically designed for use with Analog Devices
chipsets to provide isolated RS-485 and RS-422
interfaces. Carefully controlled turns ratios
ensure consistent performance whilst a toroidal
construction minimises EMI.
Specifications typical at TA = 25°C
1 LP, LL and RDC measured between pins 1-3.
2 Where pulse applied across pins 1 and 2.
3 For further information, please visit www.murata-ps.com/rohs
TECHNICAL NOTES
ISOLATION VOLTAGE
REPEATED HIGH-VOLTAGE ISOLATION TESTING
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’
are all terms that relate to the same thing, a test voltage,
applied for a specified time, across a component designed
to provide electrical isolation, to verify the integrity of that
isolation.
It is well known that repeated high-voltage isolation
testing of a barrier component can actually degrade
isolation capability, to a lesser or greater degree
depending on materials, construction and environment. This series has toroidal isolation transformers,
with no additional insulation between primary and
secondary windings of enameled wire. While parts
can be expected to withstand several times the
stated test voltage, the isolation capability does depend on the wire insulation. Any material, including
this enamel (typically polyurethane) is susceptible
to eventual chemical degradation when subject to
very high applied voltages thus implying that the
number of tests should be strictly limited. We therefore strongly advise against repeated high voltage
isolation testing, but if it is absolutely required, that
the voltage be reduced by 20% from specified test
voltage.
All products in this series are 100% production tested at
their stated isolation voltage.
A question commonly asked is, “What is the continuous
voltage that can be applied across the part in normal operation?”
-40°C to 85°C
-50°C to 125°C
4.0kVDC
For a part holding no specific agency approvals both input
and output should normally be maintained within SELV limits
i.e. less than 42.4V peak, or 60VDC. The isolation test voltage represents a measure of immunity to transient voltages
and the part should never be used as an element of a safety
isolation system. The part could be expected to function correctly with several hundred volts offset applied continuously
across the isolation barrier; but then the circuitry on both
sides of the barrier must be regarded as operating at an
unsafe voltage and further isolation/insulation systems must
form a barrier between these circuits and any user-accessible circuitry according to safety standard requirements.
This consideration equally applies to agency recognized parts rated for better than functional isolation
where the wire enamel insulation is always supplemented by a further insulation system of physical
spacing or barriers.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
KMP_782482C_A02 Page 1 of 2
782482 Series
ADM2482E/ADM2487E Compatible Converter Transformers
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS
RECOMMENDED FOOTPRINT DETAILS
9.77
(0.385) Max.
TOP VIEW
Primary
9.14
(0.360) Max.
2.54 (0.10)
Secondary
1
6
2
5
3
4
2.54 (0.10)
782482/33VC
XYYWW
Ø1.20 (0.05) +0.15 (0.006)
-0.00 (0.000)
6.35
(0.25)
3.44±0.50
(0.135±0.02)
0.30(0.012)
0.20(0.008)
0.6 (0.024)
10.16±0.40
(0.40±0.016)
2.54
(0.1)
Unless otherwise stated all dimensions in mm (inches) ±0.25 (0.01).
All pins on a 2.54 (0.1) pitch and within ±0.25 (0.01) of true position.
Package Weight 1.1g TYP.
Unless otherwise stated all dimensions in mm (inches) ± 0.25 (0.01).
All pins on a 2.54(0.1) pitch and within ±0.25(0.01) of true position.
TUBE OUTLINE DIMENSIONS
10.65 - 11.65
(0.419 - 0.459)
Unless otherwise stated all
dimensions in mm (inches)
±0.25 (0.01).
4.00 (0.16)
0.60±0.15
(0.024±0.006)
12.95
(0.51)
Tube length: 500±2 (19.7±0.08)
Tube quantity: 50
Tube material: Antistatic coated
clear PVC.
5.20 (0.21)
3.80
(0.15)
15.70 (0.62)
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2011 Murata Power Solutions, Inc.
www.murata-ps.com/support
KMP_782482C_A02 Page 2 of 2