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XE1205 Datasheet Preview

XE1205 Datasheet

High Link Budget Integrated UHF Transceiver

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XE1205
XE1205
180 MHz – 1GHz
Low-Power, High Link Budget Integrated UHF Transceiver
GENERAL DESCRIPTION
The XE1205 is an integrated transceiver operating in
the 433, 868 and 915 MHz license-free ISM (Industrial,
Scientific and Medical) frequency bands; it can also
address other frequency bands in the 180-1000 MHz
range. Its highly integrated architecture allows for
minimum external components while maintaining
design flexibility. All major RF communication
parameters are programmable and most of them can
be dynamically set. The XE1205 offers the unique
advantage of narrow-band and wide-band
communication, this without the need to modify the
number or parameters of the external components.
The XE1205 is optimized for low power consumption
while offering high RF output power and channelized
operation suited for both the European (ETSI EN 300-
220-1) and the North American (FCC part 15)
regulatory standards. TrueRF™ technology enables a
low-cost external component count (elimination of the
SAW filter) whilst still satisfying ETSI and FCC
regulations.
APPLICATIONS
Narrow-band and wide-band security systems
Voice and data over an RF link
Process and building control
Access control
Home automation
Home appliances interconnection
KEY PRODUCT FEATURES
Programmable RF output power: up to +15 dBm
High Rx sensitivity: down to -121 dBm at 1.2 kbit/s,
-116 dBm at 4.8 kbits.
Low power: RX=14 mA; TX = 62 mA @ 15 dBm
Can accommodate 300-1000 MHz frequency range
Wide band operation: up to 304.7 kbit/s, NRZ coding
Narrow band operation: 25 kHz channels for data
rates up to 4.8 kbit/s, NRZ coding; optional
transmitter pre-filtering to enable adjacent channel
power below -37 dBm at 25 kHz
On-chip frequency synthesizer with minimum
frequency resolution of 500 Hz
Continuous phase 2-level FSK modulation
Incoming data pattern recognition
Built-in Bit-Synchronizer for incoming data and clock
synchronization and recovery
FEI (Frequency Error Indicator) with built-in AFC
RSSI (Received Signal Strength Indicator)
16-byte FIFO for transmit / receive data buffering
and transfer via SPI bus
ORDERING INFORMATION
Part number
Temperature range
XE1205I074TRLF(1) -40 °C to +85 °C
(1) TR refers to tape & reel.
LF refers to Lead Free package.
This device is WEEE and RoHS compliant
Package
VQFN48
Rev 10 December 2008
1
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Semtech

XE1205 Datasheet Preview

XE1205 Datasheet

High Link Budget Integrated UHF Transceiver

No Preview Available !

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
2


Part Number XE1205
Description High Link Budget Integrated UHF Transceiver
Maker Semtech
Total Page 30 Pages
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