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 - 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 - 2170MHz	Band 1
最大输出功率	少于+24dBm	外部PA
ACLR	-45dB/-50dB	Exceeds
误差向量幅度	17.5%/12.5%	Exceeds

BOM

编号	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
电阻器
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
电感器
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与连接器
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

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