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AD6422AST Scheda tecnica(PDF) 1 Page - Analog Devices |
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AD6422AST Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 8 page REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD20msp415 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1997 GSM/DCS1800/PCS1900 Baseband Processing Chipset SYSTEM ARCHITECTURE VOICEBAND/ BASEBAND CODEC AD6421 GSM PROCESSOR AD6422 RADIO SIM DATA TERMINAL ADAPTER KEYPAD 2K 8 EEPROM DISPLAY 128K 8 RAM 256K 16 ROM AD20msp415 FEATURES Complete Baseband Processing Chipset Performs: Speech Coding/Decoding (GSM 06.XX) Channel Coding/Decoding (GSM 05.03) Equalization with 16-State Viterbi, Soft Decision All ADC and DAC Interface Functions Includes All Radio, Auxiliary and Voice Interfaces Support for GSM Data Services Embedded 16-Bit Microcontroller Embedded 16-Bit DSP Integrated SIM and Keyboard Interface Interface to AD6430 GSM RF Chipset Interface to EFR Coprocessor JTAG Boundary Scan Layer 1 Software Provided with Chipset Software Compatible with AD20msp410 Full Phase 2 Protocol Stack Software Available Full Reference Design Available for Baseband Section and Radio Section Ultralow Power Design 2.7 V to 3.3 V Operating Voltage Intelligent Power Management Features XXX mW Power Dissipation in Talk Mode XX mW Power Dissipation in Standby Mode Two TQFP Devices, Occupying Less than 7.5 cm2 APPLICATIONS GSM/DCS1800/PCS1900 Mobile Radios GENERAL DESCRIPTION The Analog Devices GSM Baseband Processing Chipset provides a competitive solution for GSM based Mobile Radio Systems. It is designed to be fully integrated, easy to use, and compat- ible with a wide range of product solutions. Examples are GSM900, DCS1800, PCS1900 handsets and PCMCIA data cards. The AD20msp415 is the higher integrated successor of the AD20msp410 chipset, which passed European GSM Type Approval in June, 1996. The chipset consists of two highly integrated, sub-micron, low power CMOS components that perform the entire baseband signal processing of the GSM handset. The system architecture is designed to be easily integrated into current designs and form the basis for next generation designs. The chipset uses an operating supply voltage of 2.7 V to 3.3 V which, coupled with the extensive power management features, significantly reduces the drain on battery power and extends the handsets talk time and standby time. CHIPSET COMPONENTS GSM Processor (GSMP) The AD6422 combines application specific hardware, an em- bedded 16-bit DSP and an embedded 16-bit microcontroller (Hitachi H8/300H). It performs channel coding and decoding and executes the protocol stack and user software. The DSP implements full rate speech transcoding according to GSM specifications, including Discontinuous Transmission (DTX) and Comfort Noise Insertion (CNI). A high performance soft- decision Viterbi equalizer is also implemented in software em- bedded in the DSP. The embedded microcontroller executes the Layer 1, 2, 3 and user MMI software. The required Layer 1 software is supplied with the chipset. To ensure minimum power consumption, the GSMP has been designed to control all the power-down functions of the other components in the handset. Voiceband/Baseband Converter (VBC) The AD6421 performs the voiceband and baseband analog-to- digital and digital-to-analog conversions, interfacing the digital sections of the chipset to the microphone, loudspeaker and radio section. In addition, the VBC contains all the auxiliary convert- ers for burst-ramping, AFC, AGC, battery and temperature monitoring. The chipset interfaces directly with the radio and supplies all the synthesizer and timing control signals required to support two synthesizers and a variety of radio architectures including the AD6450 GSM RF-Chipset. Software The required Layer 1 software is supplied with the chipset. In addition, an object code license is available for Layers 2 and 3 of the protocol stack. |
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