SKY74760 IS-95 CDMA2000 J-STD-020 SKY74660 SKY74760-11 - Datasheet Archive

 

SKY74760: Single-Band, Single-Mode Transmitter for Korean PCS Mobile Handset Applications Applications Description ·

 

PRODUCT SUMMARY SKY74760 SKY74760: Single-Band, Single-Mode Transmitter for Korean PCS Mobile Handset Applications Applications Description · Single-band, single-mode KPCS handsets The SKY74760 SKY74760 transmitter is a highly integrated device designed for use in single-band, single-mode Code Division Multiple Access (CDMA) mobile handset applications for PCS-Korea (KPCS). The device includes a silicon direct upconversion transmitter, an interstage transmit Surface Acoustic Wave (SAW) filter, and a Gallium Arsenide (GaAs) Microwave Monolithic Integrated Circuit (MMIC) Power Amplifier (PA). The device meets (and exceeds) the stringent CDMA linearity requirements up to 28 dBm output power. Features · Integrated, high performance KPCS band PA · Low power consumption in all operating modes · Direct upconversion architecture · Conforms to IS-95 IS-95 and CDMA2000 CDMA2000® 1xEV-DO, Rev. 0 · Device controlled using a three-wire read/write serial bus interface with independent supply voltage · Fully integrated VCO with auto-tuning · Dual-mode fractional-N/integer-N PLL · Variable gain PA drivers · Integrated PLL loop filter · Integrated transmit interstage SAW filter · Transmit power control with >90 dB dynamic range · Low current consumption at low transmit power minimizes current consumption and noise · Hardware transmit enable signal for gated mode operation · MCM (38-pin, 6 x 8 x 1.45 mm) Pb-free (MSL3, 250 °C per JEDEC J-STD-020 J-STD-020) package Skyworks offers lead (Pb)-free RoHS (Restriction of Hazardous Substances) compliant packaging. The transmit path implements a direct upconversion architecture that eliminates Intermediate Frequency (IF) components. The incoming CDMA baseband signal is upconverted to the desired RF frequency by the In-Phase and Quadrature (I/Q) modulator and amplified by the PA driver stage to provide variable output power. The signal is filtered by the interstage transmit SAW filter and sent to the PA to obtain the final rated power. The only external components needed to complete a CDMA radio subsystem are supply bypass capacitors and filtering capacitors at the I/Q inputs. The Phase Lock Loop (PLL) filter and bias resistors have been included on-chip. The state of the PA is controlled by the transmitter, which eliminates the need for external switches to enable/disable the PA and control its gain. Together with the SKY74660 SKY74660 receiver, the SKY74760 SKY74760 forms a complete CDMA RF radio solution, enabling the smallest RF footprint in the industry. The SKY74760 SKY74760 transmitter is fully compliant with the advanced CDMA standard, Evolution Data Only (1xEV-DO), Rev. 0. A functional block diagram for the SKY74760 SKY74760 is shown in Figure 1. Skyworks Solutions, Inc. · Phone [781] 376-3000 · Fax [781] 376-3100 · sales@skyworksinc.com · www.skyworksinc.com 200606A · Skyworks Proprietary and Confidential information · Products and Product Information are Subject to Change Without Notice · November 21, 2006 1 DCT_Q+ DCT_Q­ DCT_I+ DCT_I­ DCT_TCXO PRODUCT SUMMARY · SKY74760 SKY74760 KPCS TRANSMITTER Transmitter Block DCT_LD_OUT Fractional-N/Integer-N PLL Power Amplifier Cellular SAW Filter 90o KPCS_RF_OUT LO Generation 0o Interstage Match DCT_VCO_IO Driver Stage Bias Power Stage Bias PA Ref & Control Serial I/O Voltage control Integrated VCO Tank DCT_GAIN_CTRL DCT_LE DCT_DATA DCT_CLK Voltage reference S578 Figure 2. SKY74760 SKY74760 Transmitter Block Diagram Ordering Information Model Name SKY74760 SKY74760 KPCS Transmitter Manufacturing Part Number Product Revision SKY74760-11 SKY74760-11 (Pb-free package) Copyright © 2006 Skyworks Solutions, Inc. 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Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, Helios, and "Breakthrough Simplicity" are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. · Phone [781] 376-3000 · Fax [781] 376-3100 · sales@skyworksinc.com · www.skyworksinc.com 2 November 21, 2006 · Skyworks Proprietary and Confidential information · Products and Product Information Are Subject To Change Without Notice · 200606A