AST20S datasheet(9/33 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.

Parameter

Symbol

Test Conditions

MIN.

TYP.

MAX.

Unit

Power Gain

F = 1.95 GHz

15.5

Noise Figure

F = 1.95 GHz

0.75

Input Return Loss

RLin

F = 1.95 GHz

-11

Output Return Loss

RLout

F = 1.95 GHz

-13

1 dB Gain Compression

Output Power

Po(1dB)

F = 1.95 GHz

dBm

rd Intercept Point

Output Power

OIP3

F = 1.95 GHz

33.5

dBm

Circuit Current

Icc

F = 1.95 GHz

Non-RF

Schematic

S-parameters & Noise Figure

APPLICATION CIRCUIT

High Gain

1950 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: 0.75 mm, Width: 0.3 mm

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

C1=100 pF

C3=6.8 pF

RF OUT

AST20S

C4=10 nF

RF IN

L2=10 nH

*P1

R1=750

C5=1 uF

*P1

VDD

R2=5.1 k

L1=10 nH

C2=0.75 pF

R3=39

S11

S22

freq (1.700GHz to 2.300GHz)

1700

1800

1900

2000

2100

2200

2300

-30

-20

-10

S12

S22

S11

S21

Frequency [MHz]

500

1000

1500

2000

2500

3000

3500

Frequency (MHz)

1700

1800

1900

2000

2100

2200

2300

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

Frequency (MHz)

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