XE1205I074TRLF Просмотр технического описания (PDF) - Semtech Corporation
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XE1205I074TRLF
Semtech Corporation
XE1205I074TRLF Datasheet PDF : 48 Pages
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XE1205
TABLE OF CONTENTS
1
2
3
4
4.1
4.2
4.2.1
4.2.2
5
5.1
5.2
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.2.6
5.3
5.3.1
5.3.2
5.3.3
5.4
5.4.1
6
6.1
6.1.1
6.1.2
6.1.3
6.2
6.3
6.4
7
7.1
7.1.1
7.1.2
7.2
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
7.2.7
7.2.8
7.3
7.3.1
7.3.2
7.4
7.5
7.6
7.7
8
8.1
8.2
8.3
8.4
8.5
9
Non-conformance ........................................................................................................................................................ 3
Functional Block Diagram........................................................................................................................................... 3
Pin description............................................................................................................................................................. 4
Electrical Characteristics ............................................................................................................................................ 5
Absolute Maximum Operating Ranges .......................................................................................................................... 5
Specifications................................................................................................................................................................. 5
Operating Range ........................................................................................................................................................... 5
Electrical Specifications ................................................................................................................................................. 5
Description ................................................................................................................................................................... 7
Data Operation Modes................................................................................................................................................... 7
Receiver section ............................................................................................................................................................ 8
LNA & Receiver modes ................................................................................................................................................. 8
Interrupt signal mapping ................................................................................................................................................ 8
Receiver in continuous mode......................................................................................................................................... 8
DATA pin in bidirectional or unidirectional mode (continuous mode only) ................................................................... 14
Receiver in buffered mode........................................................................................................................................... 14
Additional narrowband filter bandwidths ...................................................................................................................... 17
Transmitter section ...................................................................................................................................................... 18
Output power ............................................................................................................................................................... 18
Transmitter in continuous mode................................................................................................................................... 18
Transmitter in buffered mode....................................................................................................................................... 20
Frequency synthesizer................................................................................................................................................. 21
Clock Output for an external processor ....................................................................................................................... 21
Highest Bit RATES: example of 304.7 kbit/s operation .......................................................................................... 22
Registers settings ........................................................................................................................................................ 22
Bitrate (BR) and frequency deviation (fdev) ................................................................................................................. 22
Rx filter ........................................................................................................................................................................ 22
Tx filter......................................................................................................................................................................... 22
Hardware settings........................................................................................................................................................ 23
Operation ..................................................................................................................................................................... 23
Typical performance .................................................................................................................................................... 23
Serial interface definition and principle of operation ............................................................................................. 24
Serial Control Interface ................................................................................................................................................ 24
Chip configuration via SPI_CONFIG interface ............................................................................................................. 25
Data transmission and reception via SPI_DATA interface. .......................................................................................... 26
Configuration and status registers ............................................................................................................................... 28
Configuration register: general description .................................................................................................................. 28
MCParam configuration register (main configuration parameters)............................................................................... 29
IRQParam configuration register (IRQ parameters)..................................................................................................... 30
TXParam configuration register (transmitter configuration parameters) ...................................................................... 31
RXParam configuration register (receiver configuration parameters) .......................................................................... 31
Pattern register ............................................................................................................................................................ 33
OSCParam configuration register (oscillator parameters) ........................................................................................... 34
ADParam configuration register (additional settings)................................................................................................... 35
Operating Modes ......................................................................................................................................................... 36
XE1205 switching time using SPI_CONFIG interface.................................................................................................. 36
XE1205 switching time using SW(1:0) pins. ................................................................................................................ 38
Selection of the reference frequency ........................................................................................................................... 38
Clock output interface .................................................................................................................................................. 39
Default settings at power-up ........................................................................................................................................ 39
Pad configuration versus chip modes .......................................................................................................................... 40
Application information ............................................................................................................................................ 41
Matching network of the receiver ................................................................................................................................. 41
Matching network of the transmitter............................................................................................................................. 41
VCO tank ..................................................................................................................................................................... 44
Loop filter of the frequency synthesizer ....................................................................................................................... 45
Reference crystal for the frequency synthesizer .......................................................................................................... 46
Packaging information .............................................................................................................................................. 47
© Semtech 2008
www.semtech.com
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