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Semtech Corporation
Semtech Corporation

SX1223 Datasheet Preview

SX1223 Datasheet

425 - 475 MHz / 850 - 950 MHz Integrated UHF Transmitter

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SX1223 pdf
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SX1223
SX1223
425 – 475 MHz / 850 – 950 MHz
Integrated UHF Transmitter
GENERAL DESCRIPTION
The SX1223 is a single chip transmitter operating in
UHF frequency bands including the 434, 869 and 915
MHz license-free ISM (Industrial Scientific and
Medical) bands. 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 set dynamically. The SX1223
offers the advantage of high data rate communication
at rates of up to 153.6 kbit/s. The SX1223 is
optimized for low cost applications while offering high
RF output power. The device is suitable for
applications which have to satisfy either the European
(ETSI-300-220) or the North American (FCC part 15)
regulatory standards.
APPLICATIONS
Automated Meter Reading (AMR)
Home Automation and Access Control
High-Quality Speech, Music and Data over RF
KEY PRODUCT FEATURES
RF output power: up to +10 dBm
Low power consumption:
TX = 25.8 mA @ 10 dBm (typical)
Supply voltage down to 2.0 V
Data rate from 1.2 to 153.6 kbit/s
On-chip frequency synthesizer
Continuous phase 2-level FSK modulation
Very small RoHS green package (TQFN24, 4mm
x 4mm)
ORDERING INFORMATION
Part number
Temperature
range
Package
SX1223I073TRT(1) -40 °C to +85 °C TQFN24
(1) TR refers to tape & reel.
T refers to Lead Free package.
This device is WEEE and RoHS compliant.
Rev 5 May 2007
www.semtech.com



Semtech Corporation
Semtech Corporation

SX1223 Datasheet Preview

SX1223 Datasheet

425 - 475 MHz / 850 - 950 MHz Integrated UHF Transmitter

No Preview Available !

SX1223 pdf
SX1223
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Table of Contents
1
2
3
3.1
3.2
3.2.1
3.2.2
4
4.1
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.2.7
4.2.8
4.3
4.4
5
5.1
5.2
5.2.1
5.2.2
5.2.3
6
6.1
6.2
6.3
6.4
6.5
7
Functional Block Diagram .................................................................................................................. 3
Pin description..................................................................................................................................... 4
Electrical Characteristics.................................................................................................................... 5
Absolute Maximum Operating Ranges.................................................................................................. 5
Specifications ........................................................................................................................................ 5
Operating Range ................................................................................................................................... 5
Electrical Specifications......................................................................................................................... 5
General description............................................................................................................................. 7
Frequency synthesizer........................................................................................................................... 7
General Structure .................................................................................................................................. 7
Crystal Oscillator ................................................................................................................................... 8
VCO....................................................................................................................................................... 8
Charge Pump ...................................................................................................................................... 10
Loop Filter............................................................................................................................................ 10
Lock Detect.......................................................................................................................................... 11
Modulator............................................................................................................................................. 11
Introduction.......................................................................................................................................... 11
Data Interface ...................................................................................................................................... 11
Bit Rate Setting for MW1 and MW2 .................................................................................................... 12
Deviation Setting for MW1 and MW2 .................................................................................................. 12
Shaping for MW1 and MW2 ................................................................................................................ 13
Modulator Saturation for MW1 and MW2............................................................................................ 13
Summary of Modulator Settings for MW1 and MW2........................................................................... 13
Frequency deviation setting for MW3.................................................................................................. 13
Power Amplifier ................................................................................................................................... 14
Voltage regulators ............................................................................................................................... 14
Serial Interface definition and Principles of operation .................................................................. 15
Serial Control Interface........................................................................................................................ 15
Configuration and Status registers ...................................................................................................... 16
Operating Modes ................................................................................................................................. 16
Other Settings...................................................................................................................................... 17
Optional and Test Parameters ............................................................................................................ 19
Application Information .................................................................................................................... 21
Matching network of the transmitter .................................................................................................... 21
Reference crystal for the frequency synthesizer ................................................................................. 22
Loop filter components ........................................................................................................................ 22
Recommended modulation conditions ................................................................................................ 22
TYPICAL APPLICATION SCHEMATICS ............................................................................................ 23
Packaging information...................................................................................................................... 24
© Semtech 2007
www.semtech.com
2


Part Number SX1223
Description 425 - 475 MHz / 850 - 950 MHz Integrated UHF Transmitter
Maker Semtech Corporation
Total Page 25 Pages
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