CX20536

PRODUCT SUMMARY CX20536: CDMA and GPS Baseband Analog Processor Applications • Dual-band, dual-mode mobile phones (including E911 capabilities) • GPS receivers analog and digital signals for CDMA and GPS operation. For a given operation, the CX20536 accepts analog In-phase (I) and Quadrature (Q) signals, performs channel selection low-pass filtering, and converts the analog baseband signals into digital signals. For clock generation, the CX20536 includes internal digital and Phase Locked Loop (PLL) clock synthesis for 19.2, 19.68, and 19.8 MHz system clocks. It also provides the capability to accept the CHIPx8 clock from the Mobile Station Modem (MSM) or equivalent baseband device. The CX20536 also integrates a VHF PLL synthesizer to synthesize a receive Intermediate Frequency (IF) Local Oscillator (LO). The CX20536 operates within a power supply voltage range of 2.7 V to 3.3 V. Power control logic maintains a minimum power consumption. Electrical performance parameters are designed to operate over the –30 °C to +85 °C range. The device is available in a 32-pin, 5 x 5 x 1 mm RF Land Grid Array (RFLGA) package. The device package and pinout are shown in Figure 1. A system block diagram of the CX20536 is shown in Figure 2. Features • Single supply voltage 2.7 to 3.3 V • Operational temperature –30 °C to +85 °C • Low power consumption in all operating modes including sleep operation • Single mode for CDMA phones, but also with GPS position location capability • Receive signal path includes: − Separate CDMA, GPS filters, and ADCs − DC offset correction • Receive VHF PLL synthesizer: − Programmable charge pump current − Lock detector output − Operate in conjunction with CDMA/GPS mode receive functions • System clock generation: − 19.2, 19.68, and 19.8 MHz system clock support − CHIPx8 accepts external CHIPx8 clock (9.8304 MHz or 8.184 MHz) • Mode control logic for receive/GPS and sleep modes • Functionality similar to the CX20489 and CX20529, with GPS processing capability • RFLGA™ (32-pin, 5 x 5 x 1 mm) package AVDD_RX IOFFSET 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 QOFFSET RXQ– RXQ+ RXI+ RXI– AVDD_SYN AVSS_SYN RXPDOUT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 RXQD1 VREFN VREFP RBIAS VC RXQD2 RXQD3 RXQD4 RXID1 RXID2 RXID3 RXID4 SLEEP SYN_ENA Description The CX20536 is a receive-only Code Division Multiple Access (CDMA) and Global Positioning System (GPS) Baseband Analog Processor (BAP) for dual-mode CDMA and GPS-capable portable phones. The device is designed to interface between the receive section and the digital processing circuitry of the telephone. The CX20536 includes all of the circuitry needed to support receive baseband signal processing and conversions between RXPLL_IN CHIPX8IN SYN_DATA SYN_CLK PLLFLTR DVDD TCXO LOCK C1387 Figure 1. CX20536 Pinout – 32-Pin RFLGA (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 103089B • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • January 14, 2005 1 PRODUCT SUMMARY • CX20536 RF Chipset PA RF Receive RF Transmit CDMA/GPS BAP CX20536 Baseband C1388 Figure 2. CX20536 System Block Diagram Ordering Information Model Name CX20536 CDMA Baseband Analog Processor CX20536-12 Manufacturing Part Number Product Revision Copyright © 2002, 2003, 2005 Skyworks Solutions, Inc. All Rights Reserved. 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Additional information, posted at www.skyworksinc.com, is incorporated by reference. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 2 January 14, 2005 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 103089B