tri-mode, dual-band functionality superior gain and phase balance in the i/q demodulator (0.2 db + 2?typical) 90 db of dynamic range in the variable gain amplifier three battery-cell operation (2.7v < vcc < 3.6v) if inputs and i/q outputs on-chip 100 to 640 mhz oscillators low-power operation: <20 ma 5mm x5mm land grid array (lga) chipscale package wireless communications products vga+l/q demodulator rflc CX74005 conexant delivers rf chipsets for 2g and 3g cdma applications the CX74005 rfic is a variable gain amplifier (vga) and in-phase and quadrature (i/q) modulator, intended for use in code division multiple access (cdma) portable phones in the cellular and personal communications system (pcs) bands. as a dual-mode ic, it can be used in cdma mode or advanced mobile phone system (amps) mode. in addition, this device can be used for wideband cdma (wcdma) applications in the imt-2000 band. the intermediate frequencies (if) are combined through separate buffers at the input of the vga, depending on the selected mode. the vga has a gain control range greater than 90 db. the device has two very high-frequency (vhf) oscillators that operate with external tank circuits. they provide signals to the local oscillator (lo) for the i /q demodulator in the cellular and pcs bands. the i/q demodulator provides a superior gain and phase balance of typically less than 0.2 db gain and 2 phase imbalances. employing silicon bipolar technology, the CX74005 is designed for high performance and a high level of integration. the CX74005, along with conexant s cx74002 transmit rfic, cx74004 lna/mixer rfic, a conexant power amplifier module and conexant s baseband processor forms a complete rf subsystem that interfaces with the most common cdma baseband devices. distinguishing features
www.conexant.com further information literature@conexant.com (800) 854-8099 (north america) (949) 483-6996 (international) order # 101068a 00-0882 wireless communications printed in usa world headquarters conexant systems, inc. 4311 jamboree road newport beach, ca 92660-3007 phone: (949) 483-4600 fax 1: (949) 483-4078 fax 2: (949) 483-4391 americas u.s. northwest - santa clara phone: (408) 249 -9696 fax: (408) 249 -7113 u.s. southwest - los angeles phone: (805) 376 -0559 fax: (805) 376 - 8180 u.s. southwest - newport beach phone: (949) 483-9119 fax: (949) 483-9090 u.s. san diego phone: (858) 713-4730 fax: (858) 713-4008 u.s. north central - illinois phone: (630) 773-3454 fax: (630) 773 -3907 u.s. south central/mexico - texas phone: (972) 871-1920 fax: (972) 871- 8910 u.s. northeast - massachusetts phone: (978) 367-3200 fax: (978) 256 - 6868 u.s. carolinas - north carolina phone: (919) 858 -9110 fax: (919) 858 - 8669 u.s. southeast/south america - florida phone: (727) 799 - 8406 fax: (727) 799 - 8306 u.s. mid-atlantic - pennsylvania phone: (215) 244- 6784 fax: (215) 244- 9292 canada - ontario phone: (613) 271-2358 fax: (613) 271-2359 eur ope europe central - germany phone: +49 89 829 -1320 fax: +49 89 834-2734 europe north - england phone: +44 1344 486444 fax: +44 1344 486555 europe - israel/greece phone: +972 9 9524000 fax: +972 9 9573732 europe south - france phone: +33 1 41 44 36 51 fax: +33 1 41 44 36 90 europe mediterranean - italy phone: +39 02 93179911 fax: +39 02 93179913 europe - sweden phone: +46 (0) 8 5091 4319 fax: +46 (0) 8 590 041 10 europe - finland phone: +358 (0) 9 85 666 435 fax: +358 (0) 9 85 666 220 asia pacific taiwan phone: (886 -2) 2-720-0282 fax: (886 -2) 2-757- 6760 australia phone: (61-2) 9869 4088 fax: (61-2) 9869 4077 china - central phone: 86 -21- 6361-2515 fax: 86 -21- 6361-2516 china - south phone: (852) 2 827- 0181 fax: (852) 2 827- 6488 china - south (satellite) phone: (86) 755 -5182495 fax: (86 ) 755 -5183024 china - north phone: (86 -10) 8529 - 9777 fax: (86 -10) 8529 - 9778 india phone: (91-11) 692-4789 fax: (91-11) 692 -4712 korea phone: (82-2) 565-2880 fax: (82-2) 565-1440 korea (satellite) phone: (82-53) 745-2880 fax: (82-53) 745-1440 singapore phone: (65) 737 7355 fax: (65) 737 9077 japan phone: (81-3) 5371 1520 fax: (81-3) 5371 1501 features and specifications product features two on-chip oscillators, one for cellular and one for pcs bands local oscillators for i/q demodulators are derived by a selectable (2 or 4) frequency divider vga has a minimum dynamic range of 90 db with a control voltage range of 0.2 to 2-7 volts the appropriate signal path is switched internally to the device, eliminating the need for off-chip switching applications tri-mode handsets cellular- and pcs - band phones cdmaone, cdma2000 and amps modes in the following bands: - u.s. cellular - japan cellular - u.s. pcs - korea pcs wcdma in the imt-2000 band conexant and the conexant symbol are trademarks of conexant systems, inc. package dimensions - 32-pin 5x5mm lga package CX74005 rx asic block diagram
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