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ASB Inc.

 sales@asb.co.kr  Tel: +82-42-528-7225

April 2017

AST54S

High Gain, Low Noise Amplifier

C1=100 pF

C2=100 pF

RF OUT

AST54S

C4=1 nF

RF IN

L2=8.2 nH

*P1

R1=820



C5=1 uF

*P1

VDD

R2=5.1 k



L1=5.6 nH

R3=43



C3=0.5 pF

1300

1400

1500

1600

1700

1800

0

5

10

15

20

25

30

Frequency (MHz)

1300

1400

1500

1600

1700

1800

-30

-25

-20

-15

-10

-5

0

Frequency (MHz)

1300

1400

1500

1600

1700

1800

-40

-35

-30

-25

-20

-15

-10

-5

0

Frequency (MHz)

0

500

1000

1500

2000

2500

3000

0

1

2

3

4

5

6

7

8

9

10

Frequency [MHz]

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

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 mm, Width: 0.3 mm

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

Bottom

Parameter

Symbol

Unit

Frequency (MHz)

1500

1610

Power Gain

dB

15.2

14.9

Noise Figure

NF

dB

0.45

0.50

Input Return Loss

dB

-18

-18

Output Return Loss

dB

-18

-18

1 dB Gain Compression

Output Power

dBm

18

18

OIP3

dBm

33

33

Circuit Current

mA

40

40

Top

GPS,GLONASS,Galileo,Compass

1500 ~ 1610 MHz

+5 V, 40 mA