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TH72032
Transmitter - 868/915MHz, ASK (SOIC8)
Description
Applications
Documents
Environmental
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Download TH72032 Datasheet (PDF)
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TH72032 General Description
The TH72032 ASK transmitter IC is designed for applications in the European 868 MHz industrial-scientific-medical (ISM) band, according to the EN 300 220 telecommunications standard. It can also be used for any other system with carrier frequencies ranging from 850 MHz to 930 MHz (e.g. for applications in the US 902 to 928 MHz ISM band).
The transmitter's carrier frequency fc is determined by the frequency of the reference crystal fref. The integrated PLL synthesizer ensures that carrier frequencies, ranging from 850 MHz to 930 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.
TH72032 Features and Benefits
Fully integrated PLL-stabilized VCO
Frequency range from 850 MHz to 930 MHz
Single-ended RF output
ASK achieved by on/off keying of internal power amplifier up to 40 kbit/s
Wide power supply range from 1.95 V to 5.5 V
Operating temperature range -40°C to +125°C
Very low standby current
On-chip low voltage detector
High over-all frequency accuracy
Adjustable output power range from -11 dBm to +9 dBm
Adjustable current consumption from 5.1 mA to 13.4 mA
Conforms to EN 300 220 and similar standards
8-pin Small Outline Integrated Circuit (SOIC)
TH72032 Related Products
Part Number
Description
EVB72035
Evaluation Board for TH72035
TH72032 Applications
Remote Controls
Alarm and Security Systems
Garage Door Openers
Automated Meter Reading (AMR)
General Digital Data Tansmission
Home and Building Automation
Low Power Telemetry Systems
Application Note
File Type
Size
Revision
Date
Action
PA Output Matching
PDF
114.5 KB
001
4/10/2006
TH72032 Documentation
DataSheet
File Type
Size
Revision
Date
Action
TH72032 DataSheet
PDF
840.1 KB
010
8/22/2011
Product flyers
File Type
Size
Revision
Date
Action
TH72032 Product Information
PDF
495.2 KB
02-07
2/27/2007
Reference
File Type
Size
Revision
Date
Action
RF Quick Reference
PDF
544.5 KB
Aug-2011
8/18/2011
Web Link
File Type
Size
Revision
Date
Action
Designing A Low-Noise VCO. An inductance-capacitance (LC) voltage-controlled oscillator (VCO) confi
2/17/2005
TH72032 Tools
TH72032 Environmental Information
Environmental Information
File Type
Size
Revision
Date
Action
Green / Halogen Free Compliance Declaration TH72032
PDF
39.7 KB
1.0
10/13/2009
Package Material Declaration - SOIC8 GR - S2
PDF
97.8 KB
7.0
1/25/2012
This text will be replaced
TH72032 In The Press
TH72032 Frequently asked Questions
EVB72032 Antenna Gain
Question
Well, the 3dB bandwidth of this loop antenna loaded with the TH72032 output should be in the range of 30MHz, maybe a little less. This is just an estimation. But you could measure the bandwidth by sweeping the PLL reference signal. Usually a reference crystal is used (e.g. 27.1344MHz to yield an RF of 868.3MHz). But you can AC-connect the RO input to a generator to sweep the reference and so you can sweep the RF.
TH71081 replacement
Answer
We can suggest following replacements: TH72031 Transmitter - 868/915MHz, FSK (SOIC8) TH72032 Transmitter - 868/915MHz, ASK (SOIC8) TH72035 Transmitter - 868/915MHz, FSK/ASK (10L QFN 3x3 Dual) For an overview of the main parameters you can download our quick section guide: http://www.melexis.com/Asset.aspx?nID=3752 For pricing, sampling and purchasing I would like to point you to our local partner in Slovenia: IC Elektronika d.o.o. Vodovodna cesta 100 Ljubljana. 1000 Slovenia Phone +386 1 5680111 Fax +386 1 5689107 E-mail prodaja@ic-elect.si Web www.ic-elect.si
TH72032 Noise Problem
Question
We are using the TH72032 and even unmodulated we are getting very strong phase noise, actually at 2Mhz from carrier still we get -36 dBcarrier noise when carrier power is 6dBm. According to the spec this should be much lower. We are using a good layout practice with ground plane one side and also under the IC body. Can anyone help please?
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