4

Impedance

Figure 7. Current conventions

Typical input

impedance

Typical load

impedance

ZDL

D

S

ZIN

G

Table 6. Impedance data

Frequency

Zin(Ω)

ZDL(Ω)

2

49.9 -j2.26

5 +j0.002

5

49.35 -j5.6

5+j0.005

10

47.5 -j10.75

5+j0.01

20

41.3 - j18.6

5+j0.02

30

34 -j22.8

5+j0.03

50

22 -j24

4.99+j0.047

70

14.6 -j21.6

4.99+j0.066

90

10.35 -j18.8

4.982+j0.084

100

8.5 -j17.5

4.98+j0.1

200

3.37 -j10.8

4.91+j0.17

300

1.6 -j6.7

4.8+j0.24

400

1.59 -j4.3

4.76+j0.245

500

1.64 -j4.35

4.53 +j0.225

600

1.19-j2.22

4.34+j0.29

700

1.175-j1.55

4.15+j0.24

800

1.16-j0.98

3.96+j0.155

900

1.16-j0.49

3.76+j0.04

1000

1.155-j0.05

3.58-j0.1

Note:

Measured gate-to-gate and drain-to-drain, respectively (balanced configuration).

ST05250

Impedance

DS12681 - Rev 4

page 7/17