DA100 Series
Transformers for Digital Audio Data Transmission
SELECTION GUIDE
Max.
Leakage
Primary
Inductance
(10kHz, 50mV)
Isolation
(Flash tested
Inductance
for 1 second)
Order Code
(100kHz, 10mV)
mH
μH
Vμs
15
dB
dB
Vrms
2000
DA101C
DA102C
DA103C
1:1
1.00 - 1.59
0.22
46.80
52.10
FEATURES
ꢀRoHS compliant
1:1
1:1
2.00 - 3.00
4.00 - 5.96
0.39
0.91
20
28
40.40
36.30
49.70
46.40
ꢀCompatible with leading chip sets
ꢀ2kVrms isolation
ORDER CODE DETAILS
ꢀIndustry-standard pinout
ꢀSurface mount option
ꢀUL 94 V-0 package materials
ꢀLow profile
Order Code
Package Type
Packaging Type
Tube
Quantity
DAXXXC
DAXXXMC
DAXXXMC-R
6 Pin DIL
6 Pin SM
6 Pin SM
50
50
Tube
ꢀSuitable for both 75 & 110Ω circuits
ꢀToroidal construction
ꢀCompliant with AES/EBU standards
ꢀFully encapsulated
Tape & Reel
500
ABSOLUTE MAXIMUM RATINGS
Operating free air temperature range
0°C to 70°C
–40°C to 125°C
Storage temperature range
DESCRIPTION
The Digital Audio Range of transformers is
designed to improve the balance of transmitter
and receiver circuitry in hi-fi equipment,
video games and other applications requiring
high-performance digital audio transmission.
Compliant with AES/EBU recommendations for the
digital audio interface, offering optimised shunt
capacitance between primary and secondary
windings. Capable of operating over the audio
data rate frequency range, providing isolation from
50-60Hz noise.
All specifications typical at TA =25°C
TECHNICAL NOTES
ISOLATION VOLTAGE
REPEATED HIGH-VOLTAGE ISOLATION TESTING
‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Volt-
age’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ testing of a barrier component can actually degrade
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
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.
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.
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.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232
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