ETAL P2781

PRODUCT DATA SHEET
P2781
MICROPROFILE LINE
MATCHING TRANSFORMER
Features
Applications
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Surface Mount
Lead-free (Pb-free)
RoHS compliant
7mm seated height
Vacuum encapsulated
IEC 60950 and UL 60950 certified
UL Recognized Component
Telecommunications
V.22bis and V.32bis modems
Line matching
Portable computers
Instrumentation
DESCRIPTION
P2781 is a microprofile transformer for applications
where high performance and safety isolation to
international standards are required in an extremely
small case size.
Designed specifically as a surface mount device, the
P2781 features a 7mm seated height and is vacuum
encapsulated and tested to 6500VDC. The part is
compliant with RoHS Directive 2002/95/EC, and
suitable for lead-free and conventional placement
and reflow.
At moderate transmit power levels (e.g. -10dBm)
performance to V.32bis may be achieved.
In instrumentation applications, the P2781 offers a
wideband frequency response from 50Hz to
40kHz.
P2781 is certified to IEC 60950 and UL 60950.
P2781 is a UL Recognized Component, and is
supported by an IEC CB Test Certificate.
Despite the subminiature size, the performance is
the equal of that of much larger components. The
P2781 offers reinforced insulation, is ideal for voice
telecommunications and for data communications to
medium speed, and can be matched to both 600Ω
and complex impedance telephone lines.
ETALDOC 240/14
Page 1 of 5
October 2007
P2781
SPECIFICATIONS
Electrical
At T = 25°C and as circuit Fig. 1 unless otherwise stated.
Parameter
Conditions
Min
Typ
Max
Units
Insertion Loss
f = 2kHz, RL = 600Ω
f = 2kHz, RL = 430Ω
-
-
2.0
4.0
dB
dB
Frequency response
-3dB LF cutoff
-3dB HF cutoff
200Hz - 4kHz
-
50
40
-
±0.2
Hz
kHz
dB
Return Loss
200Hz - 4kHz
18
-
-
dB
(1)
f = 450Hz
0dBm in line
3rd Harmonic
-
-60
-54
dBm
80
-
-
dB
-
-
10
65
Vrms
Vpeak
3.88
5.5
-
-
kVrms
kV
-25
-40
-
-
+85
+125
95
°C
°C
%R.H.
205
-
245
Ω
4.2
-
4.9
mH
Distortion
Balance
DC - 5kHz
Method TG25
Saturation
Excitation 50Hz
250Vrms
Output voltage
across line
Voltage
Isolation (2)
50Hz
DC
Operating range:
Functional
Storage(5)
Humidity
Ambient temperature
Lumped equivalent circuit parameters as Fig. 1
DC resistance, RDC(3)
Sum of windings
Leakage
inductance ΔL
Shunt
inductance Lp(4)
10mV 200Hz
10mV 1kHz
1.4
-
1.8
3.5
-
H
H
Shunt loss Rp(4)
10mV 200Hz
10mV 1kHz
5
-
10
15
-
kΩ
kΩ
ETALDOC 240/14
Page 2 of 5
October 2007
P2781
Notes
1. Third harmonic typically exceeds other
harmonics by 20dB.
2. Components 100% tested at 6.5 kVDC.
3. Caution: do not pass DC through windings.
Telephone line current, etc. must be diverted
using choke or semiconductor line hold circuit.
4. At signal levels greater than 100mV, Lp will
increase and Rp will decrease slightly but the
effect is usually favourable to the return loss
characteristic.
5. Excludes shipping materials. Components are
dry-packed and sealed as shipped. Handle in
accordance with IPC/JEDEC J-STD-033
procedure for components classified as
IPC/JEDEC J-STD-020 Moisture Sensitivity
Level 5a.
ETALDOC 240/14
Page 3 of 5
Equivalent Circuit
Fig 1
IDEAL
1:1
October 2007
P2781
PERFORMANCE
600 Ω MATCH
Recommended Circuit
Return Loss
Fig 2
Fig 4
600
-14
6.8μ F 20%*
-18
6.8nF
+_ 5%
LINE
6.8nF
+_ 5%
430
+_ 2%
dB
-22
Worst Case
-26
Typic al
-30
* If return loss > 16d B, 300Hz - 4kHz is acc eptable, b loc king
c ap a citor ma y b e rela xed to 4.7 μF +_ 50%
100Hz
200 300
20%
500
3
1kHz
2
Frequency
4 5
Frequency Response
Third Harmonic Distortion vs. Signal Level
Fig 3
Fig 5
-60
-0.3
Ca
Ty
l
W
or
st
dB
-0.2
a
p ic
se
-0.1
Third Harmonic dBc
0
Funda mental
450Hz
10
Typ ic al
-65
-70
-75
-0.4
100Hz
200 300
500
1kHz
2
Frequency
3
4 5
-80
-15
10
Frequency response driven by terminal
equipment (voltage scource with 430Ω series
resistance) measured across 600Ω is within
±0.2dB 200Hz to 4kHz
-10
-5
Fundamental Power (dBm)
0
Note:
To obtain harmonic distortion power in dBm, add
fundamental power in dBm to third harmonic in
dBc e.g. at -10dBm power in line at 450Hz, third
harmonic power is -10 + (-74) = -84dBm typical.
Recommended Circuit
Recommended Circuit
Fig 6
Fig 7
The circuit of Fig. 6 gives good TX and RX
flatness (±0.3dBm 200Hz - 4kHz).
An
alternative arrangement, using existing PCB
sites, is shown in Fig. 7. Note, however, that TX
flatness will be degraded with the topology.
ETALDOC 240/14
Page 4 of 5
October 2007
P2781
CONSTRUCTION
Dimensions
2.54 2.54
Fig 8
(0.1) (0.1)
Connections
Fig 9
13.0 max
(0.51)
e3
9.0 max
(0.36)
7.0 max
(0.28)
1.5
(0.06)
NOTE:
1
6
2
5
3
4
1.77
(0.07)
1.32
(0.052)
Tolerance ± 0.3mm
Terminals electroplated pure tin (Sn) 5µm minimum.
JESD97 Category = e3.
Terminal size : 1.5 (0.06) long, 1.32 (0.05) wide
Dimensions shown are in millimetres (inches)
Dimensions shown are in millimetres (inches).
Geometric centres of outline and pad grid coincide within a tolerance circle of 0.3mmØ.
Windings may be used interchangeably as primary or secondary.
SAFETY
CERTIFICATION
Manufactured from materials conforming to
flammability requirements of UL94V-0.
Distance through reinforced insulation 0.4mm
minimum.
Creepage and clearances in circuit are 7mm
minimum where PCB pads do not exceed 3mmØ.
Construction
complies
with
IEC 60950-1,
EN 60950-1 and UL 60950-1, reinforced insulation,
250Vrms maximum working voltage.
Certified by BSI to IEC 60950 Third Edition
(1999) (IEC CB Test Certificate No. GB592W)
sub-clauses 1.5, 1.5.1, 1.5.2, 2.9, 2.9.1, 2.9.2,
2.9.3, 2.9.4, 2.9.5, 2.10, 2.10.1, 2.10.2, 2.10.3,
2.10.3.1, 2.10.3.2, 2.10.4, 2.10.5, 2.10.5.1,
2.10.7, 2.10.8, 4.7, 4.7.3, 4.7.3.1, 4.7.3.4,
(Flammability Class V-0) ,5.2, 5.2.1, and 5.2.2 for
a maximum working voltage of 250Vrms, nominal
mains supply voltage not exceeding 250Vrms
and a maximum operating temperature of +85°C
in Pollution Degree 2 environment, reinforced
insulation.
Recognized under the Component Recognition
Program of Underwriters Laboratories Inc. to US and
Canadian
requirements
CAN/CSA
C22.2
No. 60950-1-03/UL60950-1, First Edition, based on
IEC 60950-1, First Edition, maximum working
voltage 250Vrms, Pollution Degree 2, reinforced
insulation.
UL File number E203175.
Additionally, Profec Technologies certifies all
transformers as providing voltage isolation of
3.88kVrms, 5.5kV DC minimum. All shipments
are supported by a Certificate of Conformity to
current applicable safety standards.
ETALDOC 240/14
Page 5 of 5
October 2007
P2781
ABSOLUTE MAXIMUM RATINGS
COPYRIGHT
(Ratings of components independent of circuit).
Short term isolation voltage (2s)
4.6 kVrms,
6.5kVDC
DC current
100μA
Storage temperature
-40°C to
+125°C
Soldering temperature
Profile peak
260°C
10s
Recommended peak body temperature 245°C in
accordance with IPC/JEDEC J-STD-033.
ETAL and P2781 are Trade Marks of Profec
Technologies Ltd.
The Trade Mark ETAL is registered at the UK
Trade Marks Registry.
Profec Technologies Ltd. is the owner of the
design right under the Copyright Designs and
Patents Act 1988 and no rights or licences are
hereby granted or implied to any third party.
British Patent No. 2283195
US Patent No. 5879598
European Patent No. 0725719
© 1997 - 2005 Profec Technologies Ltd.
Reproduction prohibited.
ORDERING CODE
P2781
TR = Tape and Reel
(Blank) = Bulk in tubes.
Carrier tape width 24mm,
500 parts per 13” reel.
E203175
ETAL Group Oy, Kuormatie 14, FIN-03101, Nummela
Telephone: +358 (0)20 7500 330
Fax: +358 (0)20 7500 333
Website: www.etalgroup.com
Email: etalgroup@egruppen.com
ETALDOC 240/14
Page 6 of 5
ISO 9001
FM 25326
October 2007