ATF-521P8_15 Datasheet, PDF (19/23 Pages) AVAGO TECHNOLOGIES LIMITED – High Linearity Enhancement Mode

20
45
Gain
15
40
10
35
5
30
NF
0
1.6
1.8
2.0
2.2
2.4
2.6
FREQUENCY (GHz)
Figure 15^F.^igG^ua^rin^e a¹n^5.d ^GNo^aiⁱsⁿe^aFⁿig^du^Nre^oiv^ss^e. F^Frⁱe^gq^uu^reen^vc^sy^..
Frequency.
Input and output return loss are both greater that
10 dB. Although somewhat narrowband, the response
is adequate in the frequency range of 2110 MHz to
2170 MHz for the WCDMA downlink. If wider band
response is need, using a balanced configuration
improves return loss and doubles OIP3.
0
S11
-5
-10
S22
-15
1.6
1.8
2.0
2.2
2.4
2.6
FREQUENCY (GHz)
Figure 16. Input and Output Return Loss vs.
Figure 16._FI_rn_ep_qu_ut_ea_nn_cyd_.Output Return Loss vs. ­Frequency.
Perhaps the most critical system level specification for
the ATF‑521P8 lies in its distortion-less output power.
Typically, amplifiers are characterized for linearity by
measuring OIP3. This is a two-tone harmonic mea‑
surement using CW signals. But because WCDMA is
a modulated waveform spread across 3.84 MHz, it is
difficult to correlated good OIP3 to good ACLR. Thus,
both are measured and presented to avoid ambiguity.
25
2060 2080 2100 2120 2140 2160 2180 2200
FREQUENCY (MHz)
Figure 17^F.^igO^uIP^re3 ¹v⁷s.^. F^Ore^IPqu³e^vn^sc^.y^Frin^eqW^uC^eDⁿM^cyAⁱBⁿa^Wnd^CD(P^Mou^At = 12 dBm).
Band (Pout = 12 dBm).
-30
-35
-40
-45
-50
-55
-60
-65
-3
2
7
12
17
22
Pout (dBm)
Figure 18. ACLR vs. Pout at 5 MHz Offset.
Figure 18. ACLR vs. Pout at 5 MHz Offset.
Table 2. 2140 MHz Bill of Material.
C1=1.2 pF Phycomp 0402CG129C9B200
C2,C8=1.5 pF Phycomp 0402CG159C9B200
C3=4.7 pF Phycomp 0402CG479C9B200
C4,C6=.1 µF Phycomp 06032F104M8B200
C5=1 µF
AVX 0805ZC105KATZA
C7=150 pF Phycomp 0402CG151J9B200
L1=1.0 nH TOKO LL1005-FH1n0S
L2=12 nH TOKO LL1005-FS12N
L3=39 nH TOKO LL1005-FS39
L4=3.9 nH TOKO LL1005-FH3N9S
R1=49.9Ω RohmRK73H1J49R9F
R2=383Ω Rohm RK73H1J3830F
R3=2.37Ω Rohm RK73H1J2R37F
R4=61.9Ω Rohm RK73H1J61R9F
R5=10Ω
Rohm RK73H1J10R0F
R6=1.2Ω
Rohm RK73H1J1R21F
Q1, Q2
Philips BCV62B
J1, J2
142-0701-851
19