AST20S datasheet(6/33 Pages) ASB

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ASB Inc.

· sales@asb.co.kr · Tel: +82-42-528-7223

August 2012

AST20S

High Gain, Low Noise Amplifier

1) OIP3 is measured with two tones at an output power of +4 dBm/tone separated by 1MHz.

Schematic

S-parameters & K-factor

APPLICATION CIRCUIT

S11 < -18 dB

880 ~ 953 MHz

+5 V

Board Layout (FR4, 23x13 mm

2, 0.8T)

Note: 1) the length of the strip line P1 is given as below at

the PCB with Er = 4.5 and T = 0.8 mm.

*P1 Length: 1.1 mm, Width: 0.3 mm

2) Gain and S11 are in trade-off and varied with the length of P1

Bottom

Top

600

700

800

900

1000

1100

1200

Frequency (MHz)

600

700

800

900

1000

1100

1200

-30

-25

-20

-15

-10

-5

Frequency (MHz)

600

700

800

900

1000

1100

1200

-25

-20

-15

-10

-5

Frequency (MHz)

500

1000

1500

2000

2500

3000

3500

Frequency (MHz)

Parameter

Symbol

Unit

Frequency (MHz)

880

953

Power Gain

19.5

Noise Figure

0.8

Input Return Loss

RLin

-20

-18

Output Return Loss

RLout

-14

1 dB Gain Compression

Output Power

Po(1dB)

dBm

16.5

rd Intercept Point

Output Power

OIP3

dBm

Circuit Current

Icc

C1=100 pF

C3=100 pF

RF OUT

AST20S

C2=10 nF

RF IN

L3=12 nH

R4=130

*P1

R1=750

C6=1 uF

*P1

VDD

R2=5.1 k

L2=15 nH

C4=1 nF

R3=39

C5=10 nF

L1=8.2 nH

AST20S Datasheet(PDF) 6 Page - Advanced Semiconductor Business Inc.

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