AFEM-S257 Datasheet, PDF (1/14 Pages) AVAGO TECHNOLOGIES LIMITED – GaAs E-pHEMT, pHEMT and FBAR technology

AFEM-S257
2.5-2.7 GHz WiMAX Coexistence Front End Module
Data Sheet
Description
Avago Technologies AFEM-S257 WiMAX Coexistence
Front End Module (FEM) is designed for mobile and fixed
wireless data applications in the 2.5 to 2.7 GHz frequency
range. The FEM is optimized for IEEE 802.16 WiMAX modu-
lation. AFEM-S257 exhibits flat gain and good match while
providing linear power efficiency to meet stringent mask
conditions and supports two antenna connections for RX
diversity or two simultaneous RX signals.
This module utilizes Avago Technologies proprietary GaAs
pHEMT, and FBAR technology for superior performance
across voltage and temperature levels while providing
excellent out of band rejection. AFEM-S257 is in a 5x7x1
mm MCOB package for space-constrained applications.
Functional Block Diagram
Preselector ByPass LNA
ANT-1
ANT-2
T/R-1
ANT SW nfo & OMN
T/R-2 RX Div. TX/
RX Switch
ISMN
Coex Linear Amplifier
Coex BPF
Coex BPF
RX-1
TX
Preselector ByPass LNA
Coex BPF
RX-2
Features
 GaAs E-pHEMT, pHEMT and FBAR technology
 50  all RF ports
 Typical Size: 5 x 7 x 1 mm
 3 to 5 V supply (Tx Path)
 Meets 802.16 masks at 24 dBm Pout , 16 QAM WiMAX
with 3.6 V and 420 mA
 16 QAM WiMAX EVM -34 dB (2.5%) at 24 dBm
 TX gain of 34 dB
 PAE of 18% at SEM compliant Pout = 24 dBm
 23 dB TX gain step in low power mode with reduced
Idsq
 Low power Idd, 95 mA at Pout = 0 dBm, 23 dB Gain Step
 35 dBc rejection at WiFi ISM band
 3.5 dB Noise Figure from ANT to RX
 25 dB of TX/RX Isolation
 25 dB of Rx1/Rx2 Isolation
Applications
 Portable and fixed WiMAX applications
Package Diagram
1
2
3
4
5
6
7
8
9
PA_EN ²⁸
29
30
31
32
10 _{VDD2_TX}
GND
GND
GND
GND
PA_MOD ²⁷
11 _{VDD_RX}
40
41
42
33
GND
GND
GND
GND
VREF 26
12 _{LNA1_MOD}
39
44
43
34
LNA2_MOD 25
GND
GND
GND
GND
13 ANTSW1
38
37
36
35
TRSW22 24
GND
GND
GND
GND
14 ANTSW2
23 22
21 20
19 18 17 16 15
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