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SKY74691 参数 Datasheet PDF下载

SKY74691图片预览
型号: SKY74691
PDF下载: 下载PDF文件 查看货源
内容描述: 接收器的CDMA手机应用 [Receiver for CDMA Mobile Handset Applications]
分类和应用: 手机
文件页数/大小: 2 页 / 55 K
品牌: SKYWORKS [ SKYWORKS SOLUTIONS INC. ]
 浏览型号SKY74691的Datasheet PDF文件第2页  
PRODUCT SUMMARY  
SKY74691: Receiver for CDMA Mobile Handset Applications  
After RF LNA signal amplification and filtering from the antenna,  
the received signal is downconverted from RF to the Intermediate  
Frequency (IF).  
Applications  
Single mode CDMA handsets  
The LO_IN signal (pin 39) provides a Local Oscillator (LO) port for  
Features  
the RF mixer. The UHF Voltage Controlled Oscillator (VCO) is  
buffered and amplified internally, and provides the LO to drive the  
LO port of a transmitter upconverter (such as Skyworks  
CX74002).  
Three-step gain control, cellular LNA  
External resistor to adjust LNA bias current  
Buffered LO signal for transmit upconverter  
VGA with 90 dB dynamic range  
The Variable Gain Amplifier (VGA) has a minimum dynamic range  
of 90 dB with a control voltage range of 0.2 to 2.7 V. A VHF  
oscillator operates with an internal tank circuit to provide LO  
frequencies for the I/Q demodulator.  
Integrated IF VCO and tank circuit  
VCO_ON auto-tuning control  
The noise figure, gain, and third order Input Intercept Point (IIP3)  
of each stage in the receiver are optimized to meet the system  
requirements for CDMA according to TIA/EIA-98-B/C. The design  
employs SiGe BiCMOS technology for low cost, high performance,  
and a high level of integration.  
Battery cell operation (2.7 V < VCC < 3.3 V)  
RFLGA™ (48-pin, 7 x 7 mm) Pb-free package (MSL3, 260 °C  
per JEDEC-J-STD-020) with downset paddle  
The device package and pinout for the 48-pin RF Land Grid Array  
(RFLGA) are shown in Figure 1 and a block diagram of the  
SKY74691 is shown in Figure 2.  
Description  
The SKY74691 is a highly integrated, super-heterodyne receiver.  
This single band receiver is intended for use in Code Division  
Multiple Access (CDMA) phones in cellular CDMA mode.  
Skyworks offers lead (Pb)-free “environmentally  
friendly” packaging that is RoHS compliant  
(European Parliament for the Restriction of  
Hazardous Substances).  
Except for the Surface Acoustic Wave (SAW) filters and matching  
components, the device incorporates all the components required  
to implement the receiver chain, from the Low-Noise Amplifier  
(LNA) to the In-Phase and Quadrature (I/Q) demodulator stages.  
48 47 46 45 44 43 42 41 40 39 38  
1
37 MODE_1  
GND  
CELL_LNA_IN  
GND  
LO_OUT  
35 LO_BUFF_VCC  
34  
2
3
4
36  
N/C  
N/C  
GND  
5
6
7
33 N/C  
N/C  
32 CELL_IF+  
31  
VCC_RF_BIAS  
LNA_BIAS_RES  
LNA_0  
CELL_IF–  
8
30 N/C  
29 N/C  
9
10  
28  
27 N/C  
VGA_VCC  
LNA_1  
11  
12  
13  
VCO_ON  
VCO_DEC_CAP  
VCO_TUNE  
26  
25  
CDMA_VGA_IN+  
CDMA_VGA_IN–  
14 15 16 17 18 19 20 21 22 23 24  
S307  
Figure 1. SKY74691 Pinout – 48-Pin RFLGA  
(Top View)  
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com  
200029B • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • January 14, 2005  
1