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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

L3=22 nH

*P1

R1=820



C5=1 uF

*P1

VDD

R2=5.1 k



L2=39 nH

R3=43



L1=6.8 nH

R4=430

C3=1 nF

C6=0.5 pF

=27



@ 40mA

@ 60mA

500

600

700

800

900

1000

1100

1200

0

5

10

15

20

25

Frequency (MHz)

500

600

700

800

900

1000

1100

1200

-30

-25

-20

-15

-10

-5

0

Frequency (MHz)

500

600

700

800

900

1000

1100

1200

-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.

Parameter

Symbol

Unit

Frequency

Frequency

824

960

824

960

Power Gain

dB

19.5

18.1

19.6

18.2

Noise Figure

NF

dB

0.4

0.4

0.4

0.4

Input Return Loss

dB

-18

-18

-18

-18

Output Return Loss

dB

-10

-10

-10

-10

1

dB

Gain

Compression

Output Power

dBm

17

18

19

19

OIP3

dBm

30

30

32

32

Circuit Current

mA

40

40

60

60

Schematic

S-parameters & K-factor

APPLICATION CIRCUIT

GSM, CDMA

824 ~ 960 MHz

+5 V

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: 2.0 mm, Width: 0.3 mm

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

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