AST54S_17 Datasheet, PDF (4/26 Pages) Advanced Semiconductor Business Inc. – High Gain, Low Noise Amplifier

AST54S
High Gain, Low Noise Amplifier
APPLICATION CIRCUIT
GSM, CDMA
824 ~ 960 MHz
+5 V
Schematic
Parameter
Symbol Unit
Frequency
824
960
Power Gain
Noise Figure
Gp
dB
19.5
18.1
NF
dB
0.4
0.4
Input Return Loss
RLin
dB
-18
-18
Output Return Loss
RLout
dB
-10
-10
1 dB Gain
Output Power
Compression
Po(1dB)
dBm 17
18
3^rd Intercept Point
Output Power¹⁾
OIP3 dBm 30
30
Circuit Current
Id
mA 40
40
1) OIP3 is measured with two tones at an output power of +4 dBm/tone separated by 1MHz.
Frequency
824
960
19.6
18.2
0.4
0.4
-18
-18
-10
-10
19
19
32
32
60
60
VDD
C5=1 uF
Board Layout (FR4, 23x13 mm², 0.8T)
Top
C4=1 nF
R1=820 
R3=43  @ 40mA
=27  @ 60mA
RF IN ^{C1=100 pF L1=6.8 nH}
*P1
R2=5.1 k
L2=39 nH
*P1
AST54S
L3=22 nH
C2=100 pF RF OUT
R4=430
C6=0.5 pF
C3=1 nF
Bottom
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
S-parameters & K-factor
25
0
4/26
20
-5
-10
15
-15
10
-20
5
-25
0
500
600
700
800
900
1000 1100 1200
Frequency (MHz)
0
-5
-10
-15
-20
-25
500
600
700
800
900
1000 1100 1200
Frequency (MHz)
-30
500
10
9
8
7
6
5
4
3
2
1
0
0
600
700
800
900
1000 1100 1200
Frequency (MHz)
500
1000
1500
2000
2500
3000
Frequency [MHz]
ASB Inc.  [e-mail]  Tel: [phone]
April 2017