product summary CX20489: cdma and fm baseband analog processor applications description ? ? ? ? ? ? ? ? ? ? ? the CX20489 is a receive-only baseband analog processor (bap) that can be used for code division multiple access (cdma) and advanced mobile phone system (amps) frequency modulation (fm) baseband signals. the device is designed for dual-mode cdma and amps portable phones. dual-band, dual-mode mobile phones features single supply voltage from 2.7 to 3.3 v the CX20489 is designed to interface between the radio frequency (rf) receive section and the digital processing circuitry of the telephone. the device includes all of the circuitry needed to support the receive baseband signal processing and conversions between analog and digital signals for cdma and amps (fm). operational temperature of C30 c to +85 c low power consumption in all operating modes including sleep operation dual mode for cdma and fm operation receive signal path includes: ? separate cdma/fm filters and adcs ? dc offset control loop for a given operation, the CX20489 accepts analog baseband in-phase (i) and quadrature-phase (q) signals, performs channel selection low-pass filtering, and converts the analog baseband signals into digital signals. for clock generation, the CX20489 includes internal digital and phase-locked loop (pll) clock synthesis for 19.2, 19.68, and 19.8 mhz system clocks. the device also provides the capability to generate or to accept the chipx8 clock to or from the mobile station modem (msm) or equivalent baseband device. the CX20489 also integrates a vhf pll synthesizer to synthesize the receive intermediate frequency (if). receive vhf pll synthesizer: ? programmable charge pump current ? lock detector output system clock generation: ? 19.2, 19.68, and 19.8 mhz system clock support ? accepts external chipx8 clock (9.8304 mhz or 8.184 mhz) and/or generates an internal chipx8 clock (9.8304 mhz) ? adjustable tcxo or tcxo/4 clock output driver levels and power-down capability ? provides a tcxo clock through the tcxo/4 output pin the CX20489 is characterized for operation from a power supply voltage range of 2.7 v to 3.3 v, with power control logic to maintain a minimum power consumption. electrical performance parameters are designed to operate over the C30 c to +85 c range. the device is available in 40-pin 6 x 6 mm rf land grid array (rflga?) package. mode control logic for rx, sleep, and idle modes pin-for-pin and functional compatibility with skyworks cx20529 baseband analog processor (but without gps processing capability) 40-pin 6 x 6 mm rflga? package a system block diagram of the CX20489 is shown in figure 1. skyworks solutions, inc., proprietary and confidential 1 103088a [781] 376-3000 i fax [781] 376-3100 i sales@skyworksinc .com i www.skyworksinc.com m february 5, 2003
product summary i CX20489 baseband asic rf rx rf chipset c034 p/a rf tx CX20489 bap figure 1. CX20489 general block diagram ordering information model name manufacturing part number product revision cdma/fm baseband analog processor CX20489-13 ? 2002, 2003, skyworks solutions, inc. all rights reserved. information in this document is pr ovided in connection with skyworks solutions, inc. ("skyworks") products. these materials are provided by skyworks as a service to its customers and may be used for informational purposes only. skyw orks assumes no responsibility fo r errors or omissions in these materials. skyworks may make changes to its products, specifications and product descriptions at any time, without no tice. s k yworks makes no commitment to update th e information and shall have no responsibility whatsoever for conf licts, incompatibilities, or other difficulties ar ising from future changes to its products a nd pr oduct descr i pt ions. no license, express or implied, by estoppel or otherwise, to any int e llect ual pr oper t y r i ght s is gr ant e d by t h is document . exce pt as may be provided in skyworks terms and conditions of sale for such products, skyworks assumes no liability whatsoever. th es e ma teria ls a r e prov ided "a s is " with out wa rra nty of a n y k i nd, eith er expres s or implied, rela ting to s a l e a nd/or us e of s k yworks? products including warranties relating to fi tness for a particular purpose, merchanta bility, performance, quality or non-infrin gement of any pa tent, copyright or other intellectua l pr operty right. s k y work s further does not wa rra nt the a ccura cy or completenes s of the i nformation, text, g r a p h i cs or oth e r items conta i ned with in th es e ma teria ls . skyworks shall not be liable for any spe c ial, indire ct , incide n ta l, or consequential damages, including without limitation, lost revenues or lost profit s th a t ma y res u lt from th e us e of th es e ma teri als. s k ywor ks? pr oduct s ar e not int e nded f o r use in medical, lif esav ing or life-sustaining applicatio ns. skyworks customers using o r selling s k ywor ks? pr oduct s f o r use in such applications do so at their own risk and agree to fully indemnify skyworks for any damages resulting from such improper us e or sale. the following are trademarks of skyworks solutions, inc.: skywor ks?, spr?, single package radio?, the skyworks symbol, and bre akt hr ough s i mplicit y?. pr oduct names or services listed in this publication are for identification purposes only, and ma y be trademarks of third parties. thir d-par t y br ands and names ar e t h e pr oper t y of their respective owners. rflga? is a trademark of conexant systems, inc. additional information, posted at www.skywor ksinc.com, is incorporated by reference. general information: skyworks solutions, inc. 20 sylvan rd. woburn, ma 01801 www.skyworksinc.com
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