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PRODUCT DATA SHEET
LINE MATCHING TRANSFORMER P3034


Features
  • Low distortion
  • 12.6mm (0.5") seated height
  • Vacuum encapsulated
  • Reinforced Isolaton
  • EN 41003 and EN60950 certified
  • BABT Certificate of Recognition
  • Low cost
Applications
  • Telecommunications
  • V.34 modems
  • Portable computers
  • Fax / modems


 
DESCRIPTION
 

P3034 is the transformer of choice for high-speed applications where low distortion at moderate power levels is required at a competitive price.

P3034 is a drop-in replacement for industry standard P1200 for circuits to be upgraded to V.34 (28,800 bits/second). P3034 is also mechanically and electrically compatible with P2001. Equipment incorporating P3034 will be capable of approval worldwide.

P3034 is certified to EN60950, EN41003 and is supported by a BABT Certificate of Recognition.


 
SPECIFICATIONS
 

Electrical
At T = 25�C unless otherwise stated. The convention used in this datasheet is that 'primary' windings are on the line side and 'secondary' windings are on the IC side.

Parameter Conditions Min Typ Max Units
Insertion loss f = 2kHz, RL = 560 ohms - - 1.5 dB
Frequency response LF-3dB cutoff
HF-3dB cutoff
200Hz - 4kHz		 -
10
-		 -
-
-		 50
-
�0.2		 Hz
kHz
dB
Return loss 200Hz - 4kHz 18 - - dB
Third Harmonic Distortion (1) 450Hz 0dBm in line
300Hz -10dBm
600Hz -10dBm		 -
-
-		 -78
-92
-105		 -
-
-		 dBm
dBm
dBm
Balance DC - 5kHz
Method TG25		 80 - - dB
Saturation Excitation 50Hz
250V rms.
Output voltage
across line		  
 
-
-		  
 
-
-		  
 
10
65		  
 
V rms
V peak
Voltage
isolation(2)		 50Hz
DC		 3.88
5.5		 -
-		 -
-		 kV rms
kV
Operating range:
Functional
Storage
Humidity		 Ambient temperature  
-10
-40
-		  
-
-
-		  
+70
+125
95		  
�C
�C
%R.H.

Lumped equivalent circuit parameters as Fig.1

DC resistance, R DC(3) Sum Of Windings 118   146 Ohms
Leakage inductance L   14.5   18.0 mH
Shunt inductance Lp(4) -43dBm 200Hz   5   H
Shunt loss Rp(4) -43dBm 200Hz   15   kOhms
Notes
  1. Third harmonic typically exceeds other harmonics by 20dB.
  2. Components are 100% tested at 6.5kV DC.
  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 -20dBm, Lp will increase and Rp will decrease slightly but the effect is usually favourable to the return loss characteristic.
Fig 1


 
PERFORMANCE CHARACTERISTICS
 

Fig 2 Fig 5
Fig 3 Figure 5 gives flat RX and TX responses against the reference impedance (typically around � 0.5dB 300Hz-3.4kHz). Return loss is typically better than 20dB. The circuit values in parentheses give optimum flatness at a small sacrifice in return loss.

For cicuits with existing board drillings, figure 6 gives good return loss (>20dB) and RX flatness against the reference impedance, but TX flatness is degraded by the use of this topology.
Fig 4 Fig 6
Dimensions Connections

 
SAFETY
 
 
CERTIFICATION
 
Manufactured from materials conforming to flammability requirements of UL94 V-O and EN 60950:1992 (BS7002:1992) sub-clause 1.2,13.2 (V-O).

Constructed and vacuum encapsulated in accordance with EN 60950:1992 (BS7002:1992) and EN 41003:1991 (reinforced), excessive voltage 250Vrms.

 Certified by BSI (certificate 7541) to EN 60950:1992 (BS 7002:1992) and IEC 950:1991 sub-clauses 2.2.2, 2.9.1, 2.9.7, 4.4.3 and 5.3 for a maximum working voltage of 250V, nominal mains supply voltage not exceeding 250V and a maximum operating temperature of 70�C and EN 41003:1993 sub-clauses 4.2.3(a) and 4.5.3(a).

Additionally, ETAL 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 BS requirements.

Approved and certified by BABT. BABT Certificate of Recognition CR/0136.
BABT Approved


 
ABSOLUTE MAXIMUM RATINGS
 
 
COPYRIGHT
 
Ratings of components independent of circuit).
Short Term Isolation voltage
(15s)		 4.6 kVrms
6.5 kVDC
DC Current 100�A
Storage Temperature -40�C
+125�C
Lead Temperature, 10s 260�C
ETAL P1200, P2152 and P3034 are Trade Marks of Electronic Techniques (Anglia) Limited. The Trade Mark ETAL is registered at the UK Trade Marks Registry. Electronic Techniques (Anglia) Limited 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. � 1996 Electronic Techniques (Anglia) Limited. Reproduction prohibited.

February 1997
ETALDOC 458/3

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