P1200 ETAL, P1200 Datasheet - Page 3
![Line Matching Transformer](/photos/23/86/238602/4468412_sml.jpg)
P1200
Manufacturer Part Number
P1200
Description
Line Matching Transformer
Manufacturer
ETAL
Datasheet
1.P1200.pdf
(4 pages)
Specifications of P1200
Current Rating
100µA
Transformer Mounting
PC Board
Length/height, External
12.6mm
External Width
18mm
External Depth
18mm
Transformer Type
Line Matching
Insertion Loss
1.5dB
Mounting Type
Through Hole
Rohs Compliant
Yes
Primary Impedance
600ohm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Part Number
Manufacturer
Quantity
Price
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Part Number:
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Part Number:
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Part Number:
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600
Figure 3 gives flat RX and TX responses against the
CTR21 complex reference impedance (typically
around ±0.5dB 300Hz - 3.4kHz). Return loss is
typically better than 20dB.
parentheses give optimum flatness at a small
sacrifice in return loss.
For circuits with existing board drillings, figure 4
gives good return loss (>20dB) and RX flatness
against the CTR21 complex reference impedance,
but TX flatness is degraded by the use of this
topology.
Dimensions shown are in millimetres (inches).
Geometric centres of outline and pin grid coincide within a tolerance circle of 0.6mm
Windings may be used interchangeably as primary or secondary.
ETALDOC 71/15
MATCHING RECOMMENDATIONS
CONSTRUCTION
* If return loss >16dB, 300Hz - 4kHz is acceptable, blocking
Recommended Circuit
Fig. 2
capacitor may be relaxed to 4.7 F
600
LINE
MATCH
6 . 8 F
+50%
_
20%
+ _
27nF
*
5%
The circuit values in
+50%
_
20%
+ _
33nF
5%
+ _
560
Page 3 of 4
2%
EUROPEAN CTR21 COMPLEX MATCH
Recommended Circuit
Fig. 4
Fig. 3
270
270
LINE
LINE
150nF
150nF
750
750
2 . 2 F
56nF
2 . 2 F
68nF
330
P1200
27nF
January 2001
(150nF)
100nF
(680)
750
(220)
820
150