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MAX2550-MAX2553收发器Femtocell无线参考设计
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摘要：MAX2550是完整的单芯片无线收发器，用于UMTS 1波段毫微微蜂窝(femtocell)应用。RD2550参考设计基于MAX2550和所有相关元件，设计并构建成极具竞争力的无线解决方案，支持基站收发信机(BTS)。工作频率范围：1920MHz至1980MHz (Rx)和2110MHz至2170MHz (Tx)。RD2550参考设计还支持周围宏蜂窝基站的下行信号检测，允许系统选择最佳的工作环境(功率、规范、频率、容量等)。
综述
该设计中,MAX2550作为主要的射频(RF)收发器，配合必要的外部元件构成完整的射频前端。外部元件包括：功率放大器、双工器、TCXO和无源器件。Maxim随RD2550参考设计提供一套完整的文件包，其中包括符合3GPP TS25.104家庭基站标准的测试报告。除RD2550外，我们还提供RD2551、RD2552、RD2553参考设计，分别基于MAX2551、MAX2552和MAX2553收发器构建，覆盖其它频带和标准。总之，您可以从Maxim获得高集成的单芯片毫微微蜂窝收发器，覆盖WCDMA 1-6波段和8-10波段，以及cdma2000 波段0、1和10。
| RD2550参考设计性能测试结果 | ||
| 上行链路 | ||
| 说明 | 规格 | Maxim射频器件性能 |
| 频率带宽 | 1920MHz to 1980MHz | Band 1 |
| Rx灵敏度 | -107dBm | Exceeds |
| ACS | -101dBm | Exceeds |
| 阻塞(1900MHz - 2000MHz) | -101dBm | Exceeds |
| 阻塞(1MHz - 12,750MHz，1900MHz - 2000MHz除外) | -101dBm | Exceeds |
| 互调 | -101dBm | Exceeds |
| 下行链路 | ||
| 说明 | 规格 | 测试性能 |
| 频率带宽 | 2110MHz to 2170MHz | Band 1 |
| 最大输出功率 | Less than +24dBm | 外部PA |
| ACLR | -45dB/-50dB | Exceeds |
| 误差向量幅度 | 17.5%/12.5% | Exceeds |
BOM
| 数量 | 数值 | 说明 | 元件标号 | 型号 | 制造商 | |
| 电容 | ||||||
| 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 |
| 电阻 | ||||||
| 28 | 14 | 0 | 0402 Resistor | R2, R8, R9, R33, R36, R37, R41-44, R47-49, R55 |
|
|
| 29 | 1 | 4.7K | 0402 Resistor | R10 |
|
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| 30 | 1 | 430 | 0402 Resistor | R18 |
|
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| 31 | 1 | 10 | 0402 Resistor | R22 |
|
|
| 32 | 2 | 220 | 0402 Resistor | R23, R115 |
|
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| 33 | 1 | 270 | 0402 Resistor | R27 |
|
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| 34 | 1 | 1K | 0402 Resistor | R45 |
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| 35 | 1 | 50 | 0402 Resistor | R28 |
|
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| 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 |
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| 37 | 1 | 100 | 0402 Resistor | R4 |
|
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| 电感 | ||||||
| 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 |
|
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| 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和连接器 | ||||||
| 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 |
实物展示
原理图一
原理图二
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