RF gurus-A question from a wireless dullard

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SUMMARY

The discussion centers on selecting a suitable single IC transceiver for wireless communication over a distance of 500 feet, specifically in the ISM band around 900 MHz using FSK modulation. The user seeks a solution that requires minimal control from either the laptop or the remote device, ideally allowing for straightforward data transmission of 32 bits. Recommendations include transceivers from Texas Instruments, Analog Devices, Microchip, and Macro Linear Corp, while also addressing concerns about the power rating of 8dBm and receiver sensitivity of -100dBm for successful data transmission without an RF amplifier.

PREREQUISITES
  • Understanding of RF communication principles
  • Familiarity with ISM band regulations
  • Knowledge of FSK modulation techniques
  • Basic concepts of link budget calculations
NEXT STEPS
  • Research Texas Instruments' RF transceiver offerings
  • Explore Analog Devices' wireless communication solutions
  • Learn about link budget analysis for RF communication
  • Investigate Macro Linear Corp's RF transceiver ICs for 900MHz FSK
USEFUL FOR

This discussion is beneficial for RF engineers, hobbyists working on wireless communication projects, and anyone involved in selecting transceiver solutions for short-range data transmission applications.

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RF gurus---A question from a wireless dullard

Ok, I need to collect and send data to/from a remote device about 500ft away. I'm looking for a single IC transceiver in a small smt package if possible. I'd like a transceiver that handles the communications with little to no control from either my laptop or the remote device i.e. either end hands 32 bits to the transceiver, something magic happens and the 32 bits appears at the other end. I really don't want to have to write code to control communications from A to B if at all possible. Moreover, I'm looking for something in an ISM band.

I've come across a couple of offerings from TI, Analog devices and Microchip that 'may' fit the bill. Any other suggestions would be greatly appreciated though.

Anywho, here's the question: If my transmitter has a power rating of 8dBm and my receiver has a receiver sensitivity of about -100dBm will I be able to TRx data back and forth across said 500ft without using an RF amp?

I'm an RF novice. I had a class once--years ago--to meet a requirement and then promptly dropped all of the knowledge in the expectation that I'd never have to fiddle with wireless comms. So, any insight into my problem would be greatly appreciated.

As always, thanks in advance for any and all support in my time of need.

[edit] The above transmits at 900'ishMHz using FSK modulation and the area between the device and my PC is fairly clear(a couple of small less than 8' tall trailers if any) if that helps.
 
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Anyone? Bueller, Bueller, Bueller. Well, I guess it serves me right. I should have payed more attention in class and retained said information---and text---longer than 14 seconds after the final.

[edit] according to this site: http://huizen.deds.nl/~pa0hoo/helix_wifi/linkbudgetcalc/wlan_budgetcalc.html I should be in the greem even with 0dB antenna gain at both ends. This shouldn't be the case but worse case scenerio...

Anyone out there with an IC recomendation is welcome to respond still.
 
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I have dabbled a bit with RF apps (lower freq), but no expert on your question.

If you do not get many volunteers on our forum, you might try one of the specialized
groups like http://www.rfglobalnet.com/forums/ I see they have a forum on short-range wireless and another on Chips For Wireless Applications

Another possibility is http://www.rfcafe.com/phpBB2/index.php

Another company to check is Macro Linear Corp. They have RF tranceiver ICs for 900MHz FSK. Not sure if they meet all your criteria though.
 
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You could also try contacting one of their apps engineers. Sometime the latency is long but the reply is usually helpful.
 
Most likely this can only be answered by an "old timer". I am making measurements on an uA709 op amp (metal can). I would like to calculate the frequency rolloff curves (I can measure them). I assume the compensation is via the miller effect. To do the calculations I would need to know the gain of the transistors and the effective resistance seen at the compensation terminals, not including the values I put there. Anyone know those values?

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