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ASB Inc.

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

April 2017

AST54S

High Gain, Low Noise Amplifier

C1=1 nF

C2=1 nF

RF OUT

AST54S

C4=1 nF

RF IN

L2=330 nH

R1=820



C5=1 uF

VDD

R2=5.1 k



L1=39 nH

R3=43



C3=2.2 pF

L3=1.2 nH

R4=1 k



C6=1 nF

0

250

500

750

1000

0

5

10

15

20

25

Frequency (MHz)

0

250

500

750

1000

-30

-25

-20

-15

-10

-5

0

Frequency (MHz)

0

250

500

750

1000

-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

TETRA

360 ~ 450 MHz

+5 V

Bottom

Top

Parameter

Symbol

Unit

Frequency (MHz)

360

450

Power Gain

dB

22.6

22.2

Noise Figure

NF

dB

0.8

0.8

Input Return Loss

dB

-18

-18

Output Return Loss

dB

-12

-12

1 dB Gain Compression

Output Power

dBm

18

18

OIP3

dBm

29

29

Circuit Current

mA

40

40