AH225
1W High Linearity InGaP HBT Amplifier
Application Circuit 920-960 MHz (AH225-S8PCB900)
J3
Vcc=+5V
J5 GND
C7
C7
10 uF 6032
C17
J4 Vref
R7
0
C17
C1
D3
C12
R8
Vpd
J4
0.1 uF 0805
C1
J3
R6
DNP
0
D3
SM05T1G
C15
C12
1000 pF
L1
C3
FB1
1000 pF
R3
51
R1
120
C15
R2
C10
U1
C3
C9
C11
47 pF
L4
0
L3
22 nH
L1
33 nH
1008
U1
AH225
R2
51
1
8
7
6
5
J5
C3
2
3
4
C6
C9
J2
C11
0
J1
RF
Output
0
C10
10 pF
RF
Input
C2
3.9 pF
L2
3.3 nH
Backside
Paddle
5.6 pF
22 pF
Notes:
1. See PC Board Layout, page 20 for more information.
2. Vref J4 turret can be used as control voltage for device power down (low = RF off) by setting R8 = 0 ꢀ and R8 = no connect.
3. The primary RF microstrip characteristic line impedance is 50 ꢀ.
4. Do not exceed +5.5V on Vpd or Vcc or TVS diode D3 will be damaged.
5. Components shown on the silkscreen but not on the schematic are not used.
6. The edge of L2 is placed at 170 mils from the edge of AH225 RFin pin pad (8.5° at 940 MHz).
7. The edge of C9 is placed at 80 mils from the edge of AH225 RFin pin pad (4° at 940 MHz).
8. The edge of C2 is placed at 220 mils from the edge of AH225 RFout pin pad (11° at 940 MHz).
9. Zero ohm jumpers may be replaced with copper traces in the target application layout. C2 location will need to be re-optimized if
replaced with copper trace.
10. DNP means Do Not Place.
11. Inductor L3 on Vpd line is critical for linearity performance.
12. The locations of C11, R2, C10 and C3 are non-critical. They can be placed closer to the device.
13. Ferrite Bead FB1 eliminates bypass line resonances between C15 and C1. Steward MI0603K300R-10.
14. All components are of 0603 size unless stated otherwise.
Typical Performance 920-960 MHz
Frequency
Gain
MHz
dB
dB
920
19.7
9.6
940
19.8
10.5
8.4
960
19.9
10.4
9
Input Return Loss
Output Return Loss
Output P1dB
dB
8
dBm
dBm
dBm
dB
+31.1
+46.2
+21.6
9.3
+31
+47.3
+21.7
9.2
+31.1
+48
+21.6
9.3
Output IP3 at 22 dBm/tone, ∆f = 1 MHz
WCDMA Channel Power at -50 dBc ACLR [1]
Noise Figure
Supply Voltage, Vcc
Quiescent Collector Current, Icq
V
mA
+5
300
Notes:
1. ACLR Test set-up: 3GPP WCDMA, TM1+64 DPCH, +5 MHz offset, PAR = 10.2 dB at 0.01% Prob.
Data Sheet: Rev F 05/17/12
Disclaimer: Subject to change without notice
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