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부품번호 AD20MSP410 기능
기능 GSM Baseband Processing Chipset
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AD20MSP410 데이터시트, 핀배열, 회로
a
GSM
Baseband Processing Chipset
FEATURES
Passed European GSM Phase I Type Approval
Complete Baseband Processing Chipset Performs:
Speech Coding/Decoding, According to GSM 06.XX
DTMF and Call Progress Tone Generation
Equalization with 16-State Viterbi, Soft Decision
Channel Coding/Decoding According to GSM 05.03
All ADC and DAC Interface Functions
Includes all Radio, Auxiliary and Voice Interfaces
Support for GSM Data Services
Embedded 16-Bit Microcontroller
Layer 1 Software Provided with Chipset
Full Phase 2 Protocol Stack Software Available
Integrated SIM- and Keyboard Interface
Ultralow Power Design
2.7 V Operating Voltage
Intelligent Power Management Features
Up to 70 Hours Standby Time Achievable
JTAG-Boundary Scan
Full Reference Design Available
Three TQFP Devices, Occupying Less than 12 cm2
APPLICATIONS
GSM/DCS1800 Mobile Radios and PCMCIA Cards
AD20msp410
SYSTEM ARCHITECTURE
ALGORITHM
SIGNAL
PROCESSOR
ASP
PHYSICAL
LAYER
PROCESSOR
AD20msp410
GSM CHIPSET
PLP
µC
BASEBAND
CONVERTER
BBC
RADIO
SUBSYSTEM
512K x 16 128K x 8
ROM
RAM
DISPLAY
2K x 8
EEPROM
KEYPAD
SIM
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 compatible
with a wide range of product solutions. GSM phones using this
chipset and its accompanying Layer 1, 2, 3 software have passed
the European GSM full type approval process.
The chipset consists of three highly integrated, sub-micron, low
power CMOS components that form the core baseband signal
processing of the GSM handset. The system architecture is
designed to be easily integrated into current designs and form
the basis of next generation of designs.
The chipset uses an operating voltage of 2.7 V to 3.6 V, which
coupled with the extensive power management features,
significantly reduces the drain on battery power and extends the
handset’s talktime and standby time.
CHIPSET COMPONENTS
Algorithm Signal Processor (ASP)
The ASP is an application specific variant of the ADSP-2171
standard DSP from Analog Devices. It has been optimized to
meet the cost, size and power consumption requirements of
GSM mobile applications. All necessary memory to run the
GSM specific programs is provided on-chip and with its
preprogrammed ROM, no user programming is required. The
ASP 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,
embedded in the ROM.
Physical Layer Processor (PLP)
The PLP combines application specific hardware and an
embedded 16-bit microcontroller (Hitachi H8/300H) to
perform channel coding and decoding and execute the protocol
stack and user software. The embedded processor executes the
Layer 1, 2, 3 and user MMI software. The PLP can control all
powerdown functions of the other chips and memory support
components to achieve maximum power savings.
Baseband Converter (BBC)
The BBC 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 BBC contains all the auxiliary convert-
ers for burst-ramping, AFC, AGC, battery and temperature
monitoring. The chipset interfaces directly with a variety of
industry standard radio architectures and supplies all the
synthesizer and timing control signals.
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.
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703




AD20MSP410 pdf, 반도체, 판매, 대치품
AD20msp410
Automatic Frequency Control (AFC)
The mobile radio has to track precisely the master clock
provided by the base station. Drift of the crystal oscillator over
time and temperature has to be compensated as well as fre-
quency shifts due to the Doppler effect in the case of a moving
mobile radio. The received signal is analyzed in the ASP and the
PLP and a digital control signal is generated. This signal is sent
to the two DACs in the BBC. The 10-bit DAC operates as
coarse and the 8-bit DAC as fine adjust. The weighting of the
DACs is such, that both DACs yield a combined resolution of
13 bits. The combined analog output signal is used to control
the voltage controlled, temperature compensated crystal
oscillator (VCTCXO).
Synthesizer Control
The PLP and the respective parts of the Layer 1 software
control the overall timing and frequency generation of the radio
subsystem. This includes control signals for up to two synthesiz-
ers, powerdown control signals and power amplifier monitor
signals. Detailed information can be found in the ADPLP01
data sheet.
Generation of Auxiliary Audio Signals
Under control of Layer 1 the ASP can generate a variety of fixed
and user-programmable tones. This includes all standard
DTMF and Call Progress tones as well as user defined tones.
The tone structure can consist of up to four frequency compo-
nents with individual durations.
The ASP also generates Talker Sidetone as specified in the
GSM recommendations. In comparison to traditional hardware
implementations, this software implementation provides manu-
facturing flexibility over a wide range of speaker/microphone
sensitivities.
AUDIO/AUXILIARY SECTION
VOLTAGE
REFERENCE
VOICEBAND
SERIAL
INTERFACE
FILTER
Σ/∆ DAC
Σ/∆ DAC
FILTER
PGA
MUX
PGA
PGA
AUXILIARY
SERIAL
INTERFACE
10-BIT DAC
MUX
LOCK
CAR
KIT
U BAT
TEMP
OTHER
Figure 3. Audio-/Auxiliary Section of AD7015
Figure 3 shows the audio section and the auxiliary ADC of the
BBC. Input signals can come from either a directly connected
microphone or from a remote microphone in a car kit. Input
gain can be set to 0 dB or +26 dB. The output signal can be
directly connected to a small earpiece and, for further amplifica-
tion, to an external car-kit. Two output-PGAs can be pro-
grammed for –15 dB or +6 dB.
DATA SERVICES
Data Services is considered to be an essential feature for GSM
terminals and the AD20msp410 chipset is designed to provide
flexible and low cost implementation of Data Services supported
via the GSM air interface.
APPLICATION LAYER
FOREGROUND
HANDSET
APPLICATION LAYER
COMMAND
BACKGROUND
INTERPRETER
PROTOCOL STACK
LAYERS 2/3
FRAME
ROUTER
EXTERNAL
DATA TERMINAL
ADAPTER
V110'
FRAMES
DATA TERMINAL
ADAPTER
PROTOCOL STACK
LAYER 1
AD20msp410
CHIPSET
MAN MACHINE INTERFSCE
DATA APPLICATION
LAYER 2 RELAY (L2R)
RADIO LINK PROTOCOL (RLP)
RATE ADAPTION
Figure 4. Implementation of Data Services
The selected system architecture shown in Figure 4 provides for
minimum terminal Bill of Materials, the lowest possible number
of interconnection points and the lowest power consumption
when running speech traffic only. However, the chipset provides
full channel coding and decoding for all Data Services. Parity
and convolutional encoding and interleaving for TCH/F9.6,
TCH/F4.8 and TCH/F2.4 are implemented in the PLP.
The interface to the chipset is a user-configurable, 3-wire serial
interface supplying V110 data packets as defined in GSM 05.03,
combined with protocol information and control to the Applica-
tion Layer. External to the terminal is the Data Terminal
Adapter (DTA) which runs the Data Services Software. Included
in the DTA are the rate adaptation functions and the Data
Services application. The Command Interpreter resident on the
mobile supports a serial interface protocol with the DTA via
both traffic data and control information are communicated.
The Technology Partnership can provide all requisite Data
Services Software.
SOFTWARE IMPLEMENTATIONS
A full implementation of the GSM Layer 1 functionality is
supplied as an object code module, for execution on the
controller, embedded in the PLP. Functions performed by this
software include:
• Initial scan of GSM band and selection of strongest thirty
channels as required by 03.22 and 05.08
• Mobile oscillator adjustment, timing synchronization and
BCCH decoding from serving cell (camping-on)
• Base station frequency and timing measurements and BSIC
extraction from neighbor cells under control of Layer 3
• Frequency hopping according to 05.02
• Full implementation of discontinuous reception (DRX) and
transmission (DTX)
• Reporting of received level and signal quality
–4– REV. 0

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AD20MSP410 전자부품, 판매, 대치품
AD20msp410
Mechanical Considerations
The chipset has been specifically designed to meet not only cost
and power consumption requirements but also attention was
paid to the physical dimensions. State-of-the-art package
technology was used to achieve smallest possible geometries. See
Table II for a list of main packaging dimensions and consult
individual data sheets of the three components for further
details.
Parameter
Package
Leads
Pitch
Body
Total Height
Board Area
Table II. Package Dimensions
ASP
PLP
BBC
TQFP
100
0.5
14 × 14
1.6
16 × 16
TQFP
176
0.5
24 × 24
1.7
26 × 26
TQFP
80
0.65
14 × 14
1.6
16 × 16
Unit
mm
mm2
mm
mm2
All three components utilize low profile Plastic Quad Flat Packs
with lead pitches of 0.5 mm minimum. Special attention was
paid to the possible use in PCMCIA cards.
ORDERING GUIDE
To order the parts for the AD20msp410 GSM chipset, please
order one of each of the following components.
Part Part Number
Supply Voltage Range
ASP ADSP-2178-780244
+2.7 V to 3.6 V
BBC AD53/009-9 (Special AD7015) +2.7 V to 3.6 V
PLP ADPLP01
+2.7 V to 3.6 V
An evaluation and development system may be ordered for this
chipset, under the part number, AD20msp410-EB03.
REV. 0
–7–

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