Specifications and information are subject to change without notice

WJ Communications, Inc

Phone 1-800-WJ1-4401 FAX: 408-577-6621

e-mail: sales@wj.com

Web site: www.wj.com

Page 2 of 7 April 2006

AH31

High Dynamic Range IF Amplifier

Product Information

Typical Device Data

S-parameters (Vd = +5 V, Id = 150 mA, unmatched 50

: system).

0

0.2

0.4

0.6

0.8

1

Frequency (GHz)

Gain and Max. Stable Gain

14

16

18

20

22

24

10.0

5.0

3.

0

4.

0

-0.

2

-0

.4

S11

Swp Max

1GHz

Swp Min

0.01GHz

10.0

5.0

3.

0

4.

0

-0.

2

-0

.4

S22

Swp Max

1GHz

Swp Min

0.01GHz

Notes:

Measurements are shown for an unmatched packaged device with the data being de-embedded to the device leads.

The amplifier requires a matching network at the input for proper operation. The amplifier is intrinsically well matched at the

output and ideally should “look” into 50 . Any deviation from this can affect the linearity IP3 performance for the device.

For a tuned circuit for a particular frequency, it is expected that actual gain will be higher, up to the maximum stable gain. The

maximum stable gain is shown in the dashed red line.

The impedance plots are shown from 250 – 1000 MHz, with markers placed at 0.25 – 1.0 GHz in 0.25 GHz increments.

Application Circuit PC Board Layout

Circuit Board Material: .014” FR-4, 4 layers (other layers added for rigidity), .062” total thickness, 1 oz copper

Microstrip line details: width = .024”, spacing = .036”

Typical Device Data

Freq (MHz)

S11 (dB)

S11 (ang)

S21 (dB)

S21 (ang)

S12 (dB)

S12 (ang)

S22 (dB)

S22 (ang)

50

-2.72

-5.46

17.01

175.91

-28.54

6.89

-7.44

-5.46

100

-2.77

-9.52

16.94

172.89

-28.42

8.53

-7.56

-7.93

200

-2.81

-18.01

16.86

166.99

-27.86

14.09

-7.59

-13.42

300

-2.87

-26.32

16.74

161.33

-27.14

18.38

-7.63

-19.94

400

-2.87

-35.19

16.64

155.16

-26.32

21.01

-7.83

-26.57

500

-2.95

-43.58

16.50

149.45

-25.45

22.42

-7.92

-32.04

600

-2.91

-51.71

16.40

143.72

-24.66

22.73

-8.00

-38.12

700

-2.99

-60.03

16.21

138.07

-23.89

21.29

-8.31

-45.01

800

-3.03

-67.73

16.05

132.16

-23.27

19.94

-8.46

-50.89

900

-3.14

-75.45

15.81

126.99

-22.71

17.74

-8.77

-57.30

1000

-3.22

-82.88

15.55

121.64

-22.17

15.73

-8.95

-63.63

Maximum Stable Gain

S21