REFERENCE SCHEMATIC 5364

Femtocell Radio Reference Designs Using the MAX2550–MAX2553 Transceivers

By:  Jerry Wei
Apr 11, 2012

Abstract: The MAX2550 is a complete single-chip radio transceiver for UMTS band 1 femtocell applications. The RD2550 reference design is based on the MAX2550 and contains all of the relevant components necessary to design and build a competitive radio solution to support the base-station transceiver (BTS) frequency band: 1920MHz to 1980MHz (Rx) and 2110MHz to 2170MHz (Tx). The RD2550 also supports downlink monitoring of surrounding macrocells. This enables the system to select the most suitable operating conditions (power, codes, frequencies, capacity, etc.).

Click here for an overview of the wireless components used in a typical radio transceiver.
Click here for an overview of the wireless components used in a typical radio transceiver.

General Description

The design features the MAX2550 as the main radio frequency (RF) transceiver, along with all components necessary to complete a radio design. These components include the external power amplifiers, duplexers, TCXO, and passive components. Along with the RD2550 reference design, Maxim's complete package includes a performance report to show full compliance to the 3GPP TS25.104 home-area base-station standard. In addition to the RD2550, we also have the RD2551, RD2552, and RD2553 reference designs, which are based on the MAX2551, MAX2552, and MAX2553 transceivers and cover additional frequency bands and standards. In total, Maxim's highly integrated single-chip femtocell transceiver family covers WCDMA bands 1-6 and 8-10, and cdma2000® band class 0, 1, and 10.
RD2550 Reference Design Measured Performance
Uplink Requirements
Description Specification Maxim's Radio Performance
Frequency band 1920MHz to 1980MHz Band 1
Rx sensitivity -107dBm Exceeds
ACS -101dBm Exceeds
Blocking (1900MHz to 2000MHz) -101dBm Exceeds
Blocking (1MHz to 12,750MHz, except 1900MHz to 2000MHz) -101dBm Exceeds
Intermodulation -101dBm Exceeds
Downlink Requirements
Description Specification Measured Performance
Frequency band 2110MHz to 2170MHz Band 1
Maximum output power Less than +24dBm With external PA
ACLR -45dB/-50dB Exceeds
Error vector magnitude 17.5%/12.5% Exceeds

BOM

Item Qty Value Description Reference Part Name Manufacturer
Capacitor
1 14 1000pF 0402 Capacitor C1, C13, C15, C19, C28, C86, C87-90, C190, C196, C204, C216 GRM155R71H102K Murata
2 6 100nF 0402 Capacitor C10, C12, C22, C33, C54, C77 GRM155R61A104K Murata
3 1 47µF 1206 Capacitor C34 GRM32ER61C476K Murata
4 7 1.0µF 0402 Capacitor C16, C46, C85, C91, C92, C126, 205 GRM155R60J105K Murata
5 1 10µF 1206 Capacitor C32 GRM31CR60J106K Murata
6 4 2.2µF 0603 Capacitor C17, C38, C55, C79 GRM21BR60J225K Murata
7 6 10nF 0402 Capacitor C5, C26, C37, C57, C67, C123 GRM155R71E103K Murata
8 12 100pF 0402 Capacitor C2, C3, C4, C8, C18, C23, C24, C51, C83, C217, C193, C214 GRM1555C1H101J Murata
9 4 0.47µF 0402 Capacitor C27, C58, C213, C215 GRM155R71C474K Murata
10 4 82pF 0402 Capacitor C41, C50, C69, C81 GRM1555C1H820J Murata
11 1 2.7pF 0402 high Q Capacitor C25   Johanson
12 1 2.4pF 0402 high Q Capacitor C29   Johanson
13 1 1.0pF 0402 Capacitor C56 GRM1555C1H1R0B Murata
14 1 68pF 0402 Capacitor C94 GRM1555C1H680J Murata
15 2 3.3nF 0402 Capacitor C45, C197 GRM155R71E332K Murata
16 1 22pF 0402 Capacitor C35 GRM1555C1H220J Murata
17 2 68nF 0402 Capacitor C43, C198 GRM155R71E683K Murata
18 1 33pF 0402 Capacitor C65 GRM1555C1H330J Murata
19 1 1.3nH 0402 Capacitor C39 LQG15HN1N3S02 Murata
20 0 Open 0402 Capacitor C7, C9, C20, C21, C31, C40, C42, C49, C52, C53, C59, C47, C48, C60, C68, C70, C72, C80, C82 Open  
21 1 5.1nH 0402 Inductor C36 LQG15HN5N1S02 Murata
22 1 9.1nH 0402 Inductor C14 LQG15HN9N1J02 Murata
23 1 4.3nH 0402 Inductor C11 LQG15HN4N3S02 Murata
24 2 4.7µF 0805 Capacitor C6, C30 GRM21BR60J475K Murata
25 4 2.2µF 0603 Capacitor C17, C38, C55, C79 GRM21BR60J225K Murata
26 1 200mA 0603 Ferrite Bead L2 BLM18HK471SN1 Murata
27 3 400mA 0603 Ferrite Bead L14, L22, L24 BLM18PG330SN1 Murata
Resistor
28 14 0 0402 Resistor R2, R8, R9, R33, R36, R37, R41-44, R47-49, R55    
29 1 4.7K 0402 Resistor R10    
30 1 430 0402 Resistor R18    
31 1 10 0402 Resistor R22    
32 2 220 0402 Resistor R23, R115    
33 1 270 0402 Resistor R27    
34 1 1K 0402 Resistor R45    
35 1 50 0402 Resistor R28    
36 0 Open 0402 Resistor R1, R3, R5-7, R11-17, R19-21, R24-26, R29-32, R34, R35, R38-40, R46, R50, R51, R52, R53, R54, R310, R311    
37 1 100 0402 Resistor R4    
Inductor
38 3 5.6nH 0402 Inductor L9, L10, L23 LQG15HN5N6S02 Murata
39 1 1nH 0402 Inductor L25 LQG15HN1N0S02 Murata
40 1 4.3nH 0402 Inductor L13 LQG15HN4N3S02 Murata
41 5 0402 Resistor L3, L17-20    
42 0 OPEN 0402 Inductor L1, L4, L5, L6-8, L11, L12, L15, L21, L16 OPEN  
43 1 OPEN NPN Transistor Q301 2SC4617 ROHM
IC and Connector
44 1 Dual SAW EGSM/DCS RF SAW FL3 LX14 EPCOS
45 1 RX SAW 2140MHz FL5 B9451 EPCOS
46 1 TX SAW 1950MHz RF SAW FL8 B9414 EPCOS
47 1 Duplexer Band1 Fbar Duplexer FL4 ACMD7614 Avago
48 1   LOW POWER LINEAR AMPLIFIER U2 RMX2550M Richwave
49 1   Low Noise Low Dropout Linear U14 MAX8510EXK33 Maxim
50 0 OPEN QUAD LVDS U4 MAX9173EUE Maxim
51 1   5 Band UMTS Transmitter U1 MAX2550 Maxim
52 1   Low Noise Low Dropout Linear U3, U5 MAX8887EZK33 Maxim
53 1   100 Pin Connector J3 QSS-050-01-F-D-A-K SAMTEC
54 1   RF Switch, SP2T SW1 UPG2009 NEC
55 1 19.2MHz TCXO 19.2MHz Y1 M0101-T-002-3 Taitien
56 0 OPEN Single pull 3 throw switch SW2 XM0825SF-TL1301 Murata
57 3 Connector SMA Connector J1, J6, J7 142-0711-846 Johanson
58 1 Test point Red VCC J4 5000 Keystone
59 1 Test point Black GND J5 5001 Keystone
Femtocell Radio Reference Designs Using the MAX2550–MAX2553 Transceivers
Femtocell Radio Reference Designs Using the MAX2550–MAX2553 Transceivers
More detailed image.
(PDF, 331kB)
Femtocell Radio Reference Designs Using the MAX2550–MAX2553 Transceivers
More detailed image.
(PDF, 332kB)


cdma2000 is a registered certification mark and registered service mark of the Telecommunications Industry Association.



Related Parts
MAX2550 Band I, V, and VIII WCDMA Femtocell Transceiver with GSM Monitoring Free Samples  
MAX2551 Band II and V WCDMA Femtocell Transceiver with GSM Monitoring Free Samples  
MAX2552 Band III, IV, IX, and X WCDMA Femtocell Transceiver with GSM Monitoring Free Samples  
MAX2553 Band Class 0, 1, and 10 cdma2000 Femtocell Transceiver Free Samples  


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APP 5364: Apr 11, 2012
REFERENCE SCHEMATIC 5364, AN5364, AN 5364, APP5364, Appnote5364, Appnote 5364

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