DA100J Series
SM Transformers for Digital Audio Data Transmission
KMP_DA100JC_A02 Page 1 of 3
www.murata-ps.com
www.murata-ps.com/support
For full details go to
www.murata-ps.com/rohs
FEATURES
J-STD-020D refl ow
RoHS compliant
Compatible with leading chip sets
2kVrms isolation
Industry-standard pinout
Surface mount option
UL 94 V-0 package materials
Low profi le
Suitable for both 75 & 110Ω circuits
Toroidal construction
Compliant with AES/EBU standards
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.
For through hole versions see DA100 series
datasheet.
SELECTION GUIDE
Order Code
Turns Ratio
Primary
Inductance
(10kHz, 50mV)
Max.
Leakage
Inductance
(100kHz, 10mV)
Min. Volt-time
Product, Et
Min. Return Loss
(100kHz-3MHz)
Typ. Common
Mode Rejection
(100kHz, 110Ω)
Isolation
(Flash tested
for 1 second)
mH μH Vμs dB dB Vrms
DA101JC 1:1 1.00 - 2.20 0.36 15 34.6 55.9
2000
DA102JC 1:1 1.90 - 4.00 0.49 20 38.8 52.4
DA103JC 1:1 3.20 - 8.50 0.91 28 34.9 48.5
ORDER CODE DETAILS
Order Code Package Type Packaging Type Quantity
DAXXXJC 6 Pin SM Tube 50
DAXXXJC-R 6 Pin SM Tape & Reel 500
ABSOLUTE MAXIMUM RATINGS
Operating free air temperature range -40°C to +85°C
Storage temperature range –40°C to +125°C
All specifi cations typical at T
A
=25°C
TECHNICAL NOTES
ISOLATION VOLTAGE
‘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 specifi ed 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 specifi c 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.
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 specifi ed 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.
