Reference Circuit 5364
Femtocell Radio Reference Designs Using the MAX2550–MAX2553 Transceivers
App Note
Maxim Confidential
MyMaxim SubscriptionsGeneral 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.
General Description
 Click here for an overview of the wireless components used in a typical radio transceiver. |
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 | 0Ω | 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 POWERLINEARAMPLIFIER | U2 | RMX2550M | Richwave | |
| 49 | 1 | Low NoiseLow DropoutLinear | U14 | MAX8510EXK33 | Maxim | |
| 50 | 0 | OPEN | QUAD LVDS | U4 | MAX9173EUE | Maxim |
| 51 | 1 | 5 BandUMTSTransmitter | 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 |
More detailed image. (PDF, 331kB)
More detailed image. (PDF, 332kB)
cdma2000 is a registered certification mark and registered service mark of the Telecommunications Industry Association.
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