ADL5380ACPZ-WP View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'ADL5380ACPZ-WP' PDF : 36 Pages View PDF
As the load impedance of the filter increases, the filter design
becomes more challenging in terms of meeting the required
rejection and pass band specifications. In the previous W-CDMA
example, the 500 Ω load impedance resulted in the design of a
sixth-order filter that has relatively large inductor values and small
capacitor values. If the load impedance is 200 Ω, the filter design
becomes much more manageable. Figure 92 shows a fourth-order
filter designed for a 10 MHz wide LTE signal. As shown in Figure 92,
the resultant inductor and capacitor values become much more
practical with a 200 Ω load.
2.2µH 1.5µH
2.2µH 1.5µH
Figure 92. Fourth-Order Low-Pass LTE Filter Schematic
ADL5380
Figure 93 and Figure 94 illustrate the magnitude response and
group delay response of the fourth-order filter, respectively.
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FREQUENCY (MHz)
Figure 93. Fourth-Order Low-Pass LTE Filter Magnitude Response
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FREQUENCY (MHz)
Figure 94. Fourth-Order Low-Pass LTE Filter Group Delay Response
Rev. 0 | Page 29 of 36
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