ADL5243ACPZ-R7 datasheet(23/32 Pages) AD

23 / 32 page

Data Sheet

ADL5243

Rev. A | Page 23 of 32

ADL5243 AMPLIFIER 2 MATCHING

The AMP2 input and output of the ADL5243 can be easily

matched to 50 Ω with two or three external components and

the microstrip line used as an inductor. Table 8 lists the required

matching components values. All capacitors are Murata

GRM155 series (0402 size), and Inductor L1 is a Coilcraft®

0603CS series (0603 size). For all frequency bands, the

placement of Capacitors C22, C26, and C28 is critical. Table 9

lists the recommended component spacing of C22, C26, and

C28 for the various frequencies. The component spacing is

referenced from the center of the component to the edge of the

package. Figure 59 to Figure 62 show the graphical represent-

ation of the matching network.

Table 8. Component Values

Frequency

C27

C26

C28

C22

C23

R10

R12

748 MHz

0 Ω

Open

5.1 pF

12 pF

1.3 pF

100 pF

56 nH

18 Ω

3.9 nH

943 MHz

0 Ω

3.9 pF

Open

6 pF

1.3 pF

100 pF

56 nH

18 Ω

3.3 nH

2140 MHz

2.2 pF

Open

1.8 pF

10 pF

1 pF

10 pF

9.5 nH

0 Ω

2630 MHz

2.7 pF

1.1 pF

Open

10 pF

1.3 pF

20 pF

9.5 nH

0 Ω

Table 9. Component Spacing

Frequency

C26: λ1 (mils)

C28: λ2 (mils)

C22: λ3 (mils)

748 MHz

N/A

315

201

943 MHz

236

N/A

394

2140 MHz

N/A

366

244

2630 MHz

126

N/A

240

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