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Melexis

TH72011 Datasheet Preview

TH72011 Datasheet

FSK Transmitter

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TH72011
433MHz
FSK Transmitter
Features
! Fully integrated PLL-stabilized VCO
! Frequency range from 380 MHz to 450 MHz
! Single-ended RF output
! FSK through crystal pulling allows modulation
from DC to 40 kbit/s
! High FSK deviation possible for wideband data
transmission
! Wide power supply range from 1.95 V to 5.5 V
! Very low standby current
! On-chip low voltage detector
! High over-all frequency accuracy
! FSK deviation and center frequency independ-
ently adjustable
! Adjustable output power range from
-12 dBm to +10 dBm
! Adjustable current consumption from
3.4 mA to 10.6 mA
! Conforms to EN 300 220 and similar standards
! 8-pin Small Outline Integrated Circuit (SOIC)
Ordering Information
Part Number
Temperature Code
TH72011
K (-40°C to 125°C)
Package Code
DC (SOIC8)
Delivery Form
98 pc/tube
2500 pc/T&R
Application Examples
! General digital data transmission
! Tire Pressure Monitoring Systems (TPMS)
! Remote Keyless Entry (RKE)
! Wireless access control
! Alarm and security systems
! Garage door openers
! Remote Controls
! Home and building automation
! Low-power telemetry systems
Pin Description
FSKDTA 1
FSKSW 2
ROI 3
ENTX 4
TH72011
8 VEE
7 OUT
6 VCC
5 PSEL
General Description
The TH72011 FSK transmitter IC is designed for applications in the European 433 MHz industrial-scientific-
medical (ISM) band, according to the EN 300 220 telecommunications standard; but it can also be used in
other countries with similar standards, e.g. FCC part 15.231.
The transmitter's carrier frequency fc is determined by the frequency of the reference crystal fref. The inte-
grated PLL synthesizer ensures that carrier frequencies, ranging from 380 MHz to 450 MHz, can be
achieved. This is done by using a crystal with a reference frequency according to: fref = fc/N, where N = 32 is
the PLL feedback divider ratio.
39010 72011
Rev. 008
Page 1 of 20
Data Sheet
June /07




Melexis

TH72011 Datasheet Preview

TH72011 Datasheet

FSK Transmitter

No Preview Available !

TH72011
433MHz
FSK Transmitter
Document Content
1 Theory of Operation ...................................................................................................3
1.1 General............................................................................................................................. 3
1.2 Block Diagram .................................................................................................................. 3
2 Functional Description ..............................................................................................4
2.1 Crystal Oscillator .............................................................................................................. 4
2.2 FSK Modulation ................................................................................................................ 4
2.3 Crystal Pulling................................................................................................................... 4
2.4 Output Power Selection.................................................................................................... 5
2.5 Lock Detection.................................................................................................................. 5
2.6 Low Voltage Detection...................................................................................................... 5
2.7 Mode Control Logic .......................................................................................................... 6
2.8 Timing Diagrams .............................................................................................................. 6
3 Pin Definition and Description ..................................................................................7
4 Electrical Characteristics ..........................................................................................8
4.1 Absolute Maximum Ratings .............................................................................................. 8
4.2 Normal Operating Conditions ........................................................................................... 8
4.3 Crystal Parameters ........................................................................................................... 8
4.4 DC Characteristics............................................................................................................ 9
4.5 AC Characteristics .......................................................................................................... 10
4.6 Output Power Steps ....................................................................................................... 10
5 Typical Operating Characteristics ..........................................................................11
5.1 DC Characteristics.......................................................................................................... 11
5.2 AC Characteristics .......................................................................................................... 14
6 Test Circuit ...............................................................................................................17
6.1 Test circuit component list to Fig. 18 .............................................................................. 17
7 Package Description ................................................................................................18
7.1 Soldering Information ..................................................................................................... 18
8 Reliability Information..............................................................................................19
9 ESD Precautions ......................................................................................................19
10 Disclaimer .................................................................................................................20
39010 72011
Rev. 008
Page 2 of 20
Data Sheet
June /07


Part Number TH72011
Description FSK Transmitter
Maker Melexis
Total Page 20 Pages
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