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PDF CX20536 Data sheet ( Hoja de datos )
| Número de pieza | CX20536 | |
| Descripción | CDMA and GPS Baseband Analog Processor | |
| Fabricantes | Skyworks | |
| Logotipo |  |
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PRODUCT SUMMARY
CX20536: CDMA and GPS Baseband Analog Processor
Applications
• Dual-band, dual-mode mobile phones (including E911
capabilities)
• GPS receivers
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
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.
• Receive VHF PLL synthesizer:
− Programmable charge pump current
− Lock detector output
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− 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)
32 31 30 29 28 27 26
QOFFSET 1
25 RXQD2
RXQ– 2
24 RXQD3
RXQ+ 3
23 RXQD4
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• Mode control logic for receive/GPS and sleep modes
RXI+ 4
22 RXID1
• Functionality similar to the CX20489 and CX20529, with GPS
processing capability
RXI– 5
AVDD_SYN 6
21 RXID2
20 RXID3
• RFLGA™ (32-pin, 5 x 5 x 1 mm) package
AVSS_SYN 7
19 RXID4
RXPDOUT 8
18 SLEEP
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 9
17 SYN_ENA
10 11 12 13 14 15 16
C1387
Figure 1. CX20536 Pinout – 32-Pin RFLGA
(Top View)
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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
103089B • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • January 14, 2005
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| Páginas | Total 2 Páginas | |
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