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TH71101
Receiver - 315/433MHz FSK/ASK, Single-Conversion Superhet (LQFP32)
Description
Applications
Documents
Environmental
FAQ
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Download TH71101 Datasheet (PDF)
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TH71101 General Description
The TH71101 FSK/ASK single-conversion superheterodyne receiver IC is designed for applications in the European 433 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 300 MHz to 450 MHz (e.g. for applications according to FCC part 15 and ARIB STD-T67).
TH71101 Features and Benefits
Single conversion-superhet architecture for low external component count
FSK demodulation with phase-coincidence demodulator
Low current consumption in active mode and very low standby current
Switchable LNA gain for improved dynamic range
RSSI allows signal strength indication and ASK detection
32-pin Low profile Quad Flat Package (LQFP)
TH71101 Related Products
Part Number
Description
EVB71101
Evaluation Board for TH71101
TH71101 Applications
Remote Controls
Alarm and Security Systems
Garage Door Openers
General Digital or Analog Data Receiving
Home and Building Automation
Low Power Telemetry Systems
Application Note
File Type
Size
Revision
Date
Action
Receiver Design Notes
PDF
87.1 KB
1/15/2004
TH71101 Documentation
DataSheet
File Type
Size
Revision
Date
Action
TH71101 DataSheet
PDF
455.3 KB
016
5/5/2009
Product flyers
File Type
Size
Revision
Date
Action
TH71101 Product Information
PDF
650.9 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
RF Receiver Topologies in Brief
PDF
33.8 KB
3/15/2006
Spec CDSCB10M7GA135_TH711xx
PDF
404.5 KB
6/29/2004
Test Data CDSCB10M7GA135_test
PDF
167.9 KB
6/29/2004
Web Link
File Type
Size
Revision
Date
Action
Dish Network Receiver: Analog pulls in the signal
PDF
310.3 KB
3/15/2006
TH71101 Tools
TH71101 Environmental Information
Environmental Information
File Type
Size
Revision
Date
Action
Package Material Declaration - LQFP32 LF - S2
PDF
99.0 KB
6.0
1/25/2012
RoHS Compliance Declaration TH71101
PDF
37.5 KB
1.0
11/19/2009
This text will be replaced
TH71101 In The Press
TH71101 Frequently asked Questions
RF Receiver
Question
I am designing an FSK receiver using the TH71101 at 433MHz, with data rates up to 40Kbps. I am having problems setting the threshold of the comparator, such that the output swings to Vcc. I have incorporated the AFC using a 10.7MHz discriminator and varactor, feeding the data output from the TH71101 back into the junction of the varactor and capacitor. The tuning of the parallel capacitance with the discriminator lowers the Q, but in so doing, reduces the threshold of the comparator. Pull ups do not improve the output, typically to 1.3v. Any practical suggestions would be welcome.
Question
Application appeared to be trying to drive a resistive load - the output always swings up to Vcc but the drive current is very low. Usually these receivers drive a CMOS gate, so, in this case, it was not a problem. Also, the wide band detector should work without needing an AFC - please refer to the FSK circuit in the latest revision datasheet for the TH71101 which can be found on the Melexis website here >
http://www.melexis.com/prodfiles/th71101_rev009.pdf
sosTH71101
Question
I am designing an FSK receiver using the TH71101 at 433MHz,but we can't find where to buy this thing part No. CREDIS, SMDtype value :CDSCB10M7GA135" Can you tell me please
RSSI
Question
Has anyone got an RSSI output plot of some sort for the TH71101 rather than just the two points shown in the data sheet?
TH71071
Answer
i think i will use TH71071 for transmitter, and for reciever TH71101. Actually i was doing a third year project, where i have to make more than two fire detector talk to a remote terminal wirelessly. Thats why i need the recievers to understand that the control terminal wants to talk to one perticular detector! not the other! is it possible with TH71101? And if it is posssible can u give some idea how to do it? because i do not have much ideas about these transmitter & recievers!
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