AST54S_17 Datasheet, PDF (21/26 Pages) Advanced Semiconductor Business Inc. – High Gain, Low Noise Amplifier

APPLICATION CIRCUIT
TETRA
360 ~ 450 MHz
+5 V
AST54S
High Gain, Low Noise Amplifier
Parameter
Power Gain
Noise Figure
Input Return Loss
Output Return Loss
1 dB Gain Compression
Output Power
3^rd Intercept Point
Output Power¹⁾
Circuit Current
Symbol Unit
Gp
NF
RLin
RLout
Po(1dB)
dB
dB
dB
dB
dBm
Frequency (MHz)
360
450
22.6
22.2
0.8
0.8
-18
-18
-12
-12
18
18
OIP3 dBm 29
29
Id
mA 40
40
1) OIP3 is measured with two tones at an output power of +4 dBm/tone separated by 1MHz.
Schematic
VDD
RF IN
C4=1 nF
R1=820  R3=43 
C5=1 uF
C1=1 nF L3=1.2 nH
C3=2.2 pF
R2=5.1 k
L1=39 nH
AST54S
L2=330 nH
C2=1 nF RF OUT
C6=1 nF
R4=1 k
Board Layout (FR4, 28x16 mm², 0.8T)
Top
Bottom
S-parameters & K-factor
25
0
-5
20
-10
15
-15
10
-20
5
-25
0
0
0
-5
-10
-15
-20
-25
0
250
500
750
Frequency (MHz)
1000
250
500
750
Frequency (MHz)
1000
-30
0
10
9
8
7
6
5
4
3
2
1
0
0
250
500
750
Frequency (MHz)
1000
500
1000
1500
2000
2500
3000
Frequency [MHz]
21/26
ASB Inc.  [e-mail]  Tel: [phone]
April 2017