P1200 ETAL, P1200 Datasheet - Page 3

• Manufacturer Part Number: P1200
• Description: Line Matching Transformer
• Manufacturer: ETAL

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

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