782485/35C Murata Power Solutions Inc, 782485/35C Datasheet
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782485/35C
Manufacturer Part Number
782485/35C
Description
XFRMR 1:2.2 T/H ADM2485 ANLG DEV
Manufacturer
Murata Power Solutions Inc
Series
782485r
Datasheet
1.78248535C.pdf
(2 pages)
Specifications of 782485/35C
Inductance
234µH
Product
Isolation Transformers
Mounting Style
SMD/SMT
Dimensions
9.77 mm L x 9.14 mm W x 6.35 mm H
Height
6.35 mm
Length
9.77 mm
Termination Style
Solder
Width
9.14 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
ADM2485
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
811-1203-5
FEATURES
DESCRIPTION
The 782485 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.
www.murata-ps.com
RoHS compliant
Analog Devices ADM2485 compatible
2.5kVrms isolation
Industry-standard pinout
UL 94 V-0 package materials
Low profile
Toroidal construction
Fully encapsulated
Industrial temperature range
Surface mount versions available soon
Recommended by Analog Devices, Inc.
Backward compatible with
Sn/Pb soldering systems
www.murata-ps.com/rohs
For full details go to
Specifications typical at T
1 Where pulse applied across pins 1 and 2.
2 For further information, please visit www.murata-ps.com/rohs
ABSOLUTE MAXIMUM RATINGS
SOLDERING INFORMATION
SELECTION GUIDE
CHARACTERISTICS 782485/35C
Parameter
Primary Inductance, L
Leakage Inductance, L
Interwinding Capacitance, C
Primary DC Resistance, R
Volt-time Product, Et
Operating free air temperature range
Storage temperature range
Isolation voltage (flash tested for 1 second)
Peak wave solder temperature
Pin finish
TECHNICAL NOTES
ISOLATION
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Volt-
age’, ‘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.
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 opera-
tion?”
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 volt-
age 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 cor-
rectly 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-acces-
sible circuitry according to safety standard requirements.
782485/35C
782485/55C
Order Code
VOLTAGE
1
A
P
= 25°C
Nominal Input
L
DC
Voltage
WW
3.3
5.0
V
2
Output Voltage
Conditions
100kHz, 10mV
100kHz, 10mV
100kHz, 10mV
<0.1VDC
5kHz, 5V
Nominal
6.0
6.0
V
Technical enquiries - email: mk@murata-ps.com, tel:
ADM2485 Compatible Converter Transformers
Max. Output
Current
REPEATED HIGH-VOLTAGE ISOLATION TESTING
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 environ-
ment. 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 de-
pend 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 there-
fore 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.
This consideration equally applies to agency recog-
nized parts rated for better than functional isolation
where the wire enamel insulation is always supple-
mented by a further insulation system of physical
spacing or barriers.
200
200
mA
Typ.
234
168
273
24
12
782485/35C
Max.
782485 Series
500
50
Isolation
Voltage
2500
2500
V
RMS
KMP_782485C_A03 Page 1 of 2
-40°C to 85°C
-50°C to 125°C
2.5kVrms
300˚C for 10 seconds
Matte tin
Typ.
513
192
383
37
19
782485/55C
1CT:2.2CT
1CT:1.5CT
Turns
Ratio
+44 (0)1908 615232
Max.
600
50
Package
Units
Style
mΩ
Vμs
DIL
DIL
μH
nH
pF
Related parts for 782485/35C
782485/35C Summary of contents
Page 1
... For full details go to www.murata-ps.com/rohs www.murata-ps.com SELECTION GUIDE Nominal Input Nominal Output Voltage Voltage Order Code V V 782485/35C 3.3 6.0 782485/55C 5.0 6.0 CHARACTERISTICS 782485/35C Parameter Conditions Primary Inductance, L 100kHz, 10mV P Leakage Inductance, L 100kHz, 10mV L Interwinding Capacitance, C 100kHz, 10mV WW Primary DC Resistance, R <0.1VDC DC Volt-time Product ...
Page 2
... PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS 9.77 (0.385) Max. 9.14 (0.360) Max. 782485/35C XYYWW 6.35 (0.25) 3.44±0.50 (0.135±0.02) 0.30(0.012) 0.20(0.008) 10.16±0.40 (0.40±0.016) 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. ...