P2001 ETAL [ETAL Group], P2001 Datasheet - Page 3

• Manufacturer Part Number: P2001
• Description: LINE MATCHING TRANSFORMER
• Manufacturer: ETAL [ETAL Group]

ETALDOC 100/17
600
PERFORMANCE CHARACTERISTICS
dB
dB
Frequency Response
Return Loss
F ig 3
F ig 4
* If return loss > 16dB, 300Hz - 4kHz is ac ceptable, bloc king
-0.4
-0.1
-0.2
-0.3
-14
-18
-22
-26
-30
Recommended Circ uit
F ig 2
capacitor may be relaxed to 4.7 F
600
100Hz
100Hz
0
Ω
LINE
MATCH
200 300
200 300
6.8 F
µ
+ 50%
_
20%
500
T ypic al
500
+ _
27nF
*
5%
Worst Case
F requency
F requency
1kHz
1kHz
µ
+ 50%
_
20%
2
2
+ _
33nF
3
3
5%
4 5
4 5
+ _
Page 3 of 5
560
10
10
2%
EUROPEAN CTR21 COMPLEX MATCH
Figure 5 gives flat RX and TX responses against the
reference impedance (typically around
300Hz - 3.4kHz). Return loss is typically better than
20dB.
optimum flatness at a small sacrifice in return loss.
For circuits 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.
Recommended Circ uit
Recommended Circ uit
F ig 5
F ig 6
270
270
LINE
LINE
The circuit values in parentheses give
150nF
150nF
750
750
2.2 F
56nF
2.2 F
68nF
330
µ
µ
P2001
February 2006
27nF
(150nF)
100nF
(680)
750
+ _
0.5dB
(220)
820
150