AST20S datasheet(18/33 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 = 433 MHz

23.5

Noise Figure

F = 433 MHz

0.95

Input Return Loss

RLin

F = 433 MHz

-9

Output Return Loss

RLout

F = 433 MHz

-9

1 dB Gain Compression

Output Power

Po(1dB)

F = 433 MHz

dBm

rd Intercept Point

Output Power

OIP3

F = 433 MHz

27.5

dBm

Circuit Current

Icc

F = 433 MHz

Non-RF

Schematic

S-parameters

APPLICATION CIRCUIT

433 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: 3.5 mm, Width: 0.3 mm

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

C1=7.5 pF

C3=100 pF RF OUT

AST20S

C2=10 nF

RF IN

L2=47 nH

R4=270

*P1

R1=750

C6=1 uF

*P1

VDD

R2=5.1 k

L1=18 nH

C4=1 nF

R3=39

C5=10 nF

200

300

400

500

600

700

Frequency (MHz)

200

300

400

500

600

700

-20

-15

-10

-5

Frequency (MHz)

200

300

400

500

600

700

-20

-15

-10

-5

Frequency (MHz)

200

300

400

500

600

700

-50

-40

-30

-20

-10

Frequency [MHz]

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