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PDF CX20505-14 Data sheet ( Hoja de datos )
| Número de pieza | CX20505-14 | |
| Descripción | Integrated Analog Device for GSM and GPRS Applications | |
| Fabricantes | Skyworks | |
| Logotipo |  |
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PRODUCT SUMMARY
CX20505-14 Integrated Analog Device for GSM and GPRS
Applications
APPLICATIONS
Introduction
• Global System for Mobile communications™ (GSM™)
and General Packet Radio Service (GPRS) Multiband
Handsets
• GSM and GPRS Data Modules
The CX20505-14 Integrated Analog (IA) is a highly integrated
device designed for use in multi-band GSM and GPRS
handsets. This device implements all the voice-band, mixed
signal, and radio control functions in a GSM/GPRS handset.
FEATURES
In the receive path, the CX20505-14 digitizes the baseband
In-Phase/Quadrature (I/Q) input, and outputs the digital
• Supports Multi-slot GPRS up to Class 10
samples on the device receive port. The receive path features
• Σ∆ Analog-to-Digital Converters (ADCs) for digitization of
a PGA for AGC of the receive signal.
baseband receive signal
• Receive path Programmable Gain Amplifier (PGA) for
In the transmit path, bursts of digital data are input to the
device over the control port. The GMSK modulator generates
Automatic Gain Control (AGC) of received signal
modulated I and Q waveforms from the input data. The I and Q
• Burst Store Random Access Memory (RAM) for storage of
waveforms are converted into analog waveforms and output
transmit data bursts
from the device.
•
Gaussian Minimum-Shift Keying (GMSK)
for modulation of Burst Store contents
Digital
ModuDlaattoarSheet4UT.cheomCX20505-14
generates
an
analog
signal
to
control
the
• Digital-to-Analog Converters (DACs) for analog conversion
handset Power Amplifier (PA) output level. The signal is then
of the GMSK modulator output
input to the Power Amplifier Control (PAC) circuit.
• Transmit power ramping and power level control
• Low noise, voice-band ADC for interface to handset
microphone
The voice-band Codec section provides an interface to a 32 Ω
handset speaker and microphone. Line In/Out signals are also
available for interfacing to audio accessories such as a headset
• Low noise voice-band DAC for interface to handset
or car kit.
speaker
• Auxiliary 8-bit ADC for monitoring system signals such as
battery voltage
• High speed serial ports for interface to a Baseband
Processor device
The device operates directly from a single cell, 3.6 V Li Ion
battery with no external regulation required. The device
features Low Drop Out (LDO) voltage regulators that generate
the required device power supplies from the battery input.
• Internal power supply regulation from a single input
A typical CX20505-14 application in a handset design is shown
voltage
in Figure 1. The device is packaged in a compact, 104-pin
• Temperature Sensor for system thermal monitoring
(10mm x 10mm) Fine Pitch Ball Grid Array (FPBGA) see
• 104-pin 10 mm x 10 mm FPBGA package
Error! Reference source not found...
.
DataShee
DataSheet4U.com
103186A
Skyworks Solutions, Inc., Proprietary and Confidential
1
September 22, 2003
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet CX20505-14.PDF ] | |
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