ISM-Transceiver ATR2406 This gives answers most often asked quest

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

ISM-Transceiver ATR2406 This gives answers most often asked quest

Datasheet Thumbnail

Top Searches for this datasheet

Frequently Asked Questions ISM-Transceiver
ISM-Transceiver ATR2406
This gives answers most often asked questions concerning ATR2406 related application.
Rev. 0.5, 26-Aug-04
PRELIMINARY INFORMATION
PRELIMINARY INFORMATION
Questions
Transmitter T-Q1: Which data rates possible with ATR2406 T-Q2: What maximum possible slot length T-Q3: What's reason frequency drift open-loop-systems Receiver R-Q1: datasheet states that clock recovery only available when 1,152kbps data rate set. Does clock recovery function also works other data rates than 1,152 kbps R-Q2: case other lower data rates, micro will need over sample data other sampling techniques decode incoming stream R-Q3: What bandwidth RX-Section R-Q4: What duration zero before data-slicer threshold point drifts away General. G-Q1: What typical link range G-Q2: low-cost crystal G-Q3: there layout RF-Demoboard available G-Q4: What have when want AUX-Regulator G-Q5: Which supply voltage range case bypassing AUX-Regulator G-Q6: power-consumption reduced G-Q7: Which kind substrate using your RF-Demoboard G-Q8: there demands Loopfilter components G-Q9: interface ATR2406 Microcontroller
Document History
Date 27.07.2004 Revision Author Oliver Durm Oliver Durm Christian Bechter Bechter Durm Oliver Durm Remarks Start documentation, T-Q1 R-Q1 added complementation answers, T-Q3, T-Q4 G-Q3 added Interfacing ATR2406 added Link range tests added AUX-Regulator questions added
18.08.2004 20.08.2004 25.08.2004 26.08.04
ATR2406
Rev. 0.5, 26-Aug-04
ATR2406
Transmitter
T-Q1: Which data rates possible with ATR2406
T-A1: possible data rates which applied ATR2406 144, 288, 1,152 kbps
T-Q2: What maximum possible slot length
T-A3: rule thumb, maximum slot length will longer loopfilter bigger capacitor values. However, also settling time will increased using bigger capacitor which implies bigger loopfilter time constant. details please have look Application Note "Loopfilter component calculations".
T-Q3: What's reason frequency drift open-loop-systems
Frequency drift issue which applies systems using open-loop-modulation maximum possible slot length depends frequency drift open loop enable. frequency drift determined leakage external loopfilter components, leakage currents leakage tune-Input ATR2406 which cause slowly drifting frequency when open-loop-mode. reducing drift optimizing application requirements please have look Application Note "Loopfilter component calculations".
Rev. 26-Aug-04
PRELIMINARY INFORMATION
3(9)
PRELIMINARY INFORMATION
Receiver
R-Q1: datasheet states that clock recovery only available when 1,152kbps data rate set. Does clock recovery function also works other data rates than 1,152 kbps
R-A1: right that Clock Recover designed work 1,152 MBit's. example have 1-0-1-0-1-0 pattern, clock recovery will mark middle position where microcontroller sample data. However, having 11-00-11 will marks one's marks zero's. Now, 11-00-11-00 pattern also preamble kbit's bitstream. This means possible using clock recovery lower bitrates (integer dividers 1.152 Mbit/s) blanking "double-marks" software. following figure makes this more clear:
ATR2406 1152 kbps 1152 kbps kbps kbps
falling slope falling slopes
Fig. Recovered Clock versus received bits different datarates
R-Q2: case other lower data rates, micro will need over sample data other sampling techniques decode incoming stream
R-A2: clock recovery function very useful high data rates reduce load. data rates below 1,152 kbps might more convenient oversample/poll incoming data than using clock recovery function.
ATR2406
Rev. 0.5, 26-Aug-04
ATR2406
R-Q3: What bandwidth RX-Section
R-A3: bandwidth RX-Section defined internal filters. 1450
R-Q4: What duration zero before data-slicer threshold point drifts away
R-A4: strength advantage ATR2406 comparing competing products that there analogue data-slicer inside pure digital demodulator there drift there restrictions syncword length data message real applications. maximum transmit slot length determined loopfilter time constant. more details please refer Application Note "Loopfilter component calculations".
Rev. 26-Aug-04
PRELIMINARY INFORMATION
5(9)
PRELIMINARY INFORMATION
General
G-Q1: What typical link range
G-A1 typical link range ATR2406-DEV-BOARD with +3dBm RF-Output power, -91dBm sensitivity integrated PCB-F-Antenna more than 100m. (Tested with SmartRF-Firmware, criteria link quality)
G-Q2: low-cost crystal
G-A2: tolerance crystal should equal less than ±20ppm. Background: crystal frequency which i.e. only +20ppm higher than specified center frequency will lead frequency offset about 2.45 GHz. Taking this into calculation tolerance will cause worst-case separation 100kHz. Since ATR2406 utilizes high deviation 400kHz internal automatic adjustment circuit covering slightly more than this, worst-case offset accepted without having impact performance
G-Q3: there layout RF-Demoboard available
Yes, manufacturing data will provided upon request.
G-Q4: What have when want AUX-Regulator
Just remove AUX-Transistor bypass Additionally, using well stabilised power supply also omit tantalum capacitors around AUX-Regulator lowering BOM.
G-Q5: Which supply voltage range case bypassing AUX-Regulator
supply voltage from 2.9V maximum 3.6V however 3.6V really maximum, there should small peak which higher your supply voltage while i.e. switching recommended voltage around 3.0V AUX-Regulator.
ATR2406
Rev. 0.5, 26-Aug-04
ATR2406
G-Q6: power-consumption reduced
G-A3: power consumption reduced using burstmode. idea behind this that data packet sent fast possible keep On-The-Air time (OTA) possible. small transmit receive bursts, average power consumption reduced significantly
G-Q7: Which kind substrate using your RF-Demoboard
G-A4: substrate using RF-Demoboard standard layer (eps_r 4.4). substrate height 500µm conductor thickness (copper) 35µm. structures (track width, microstrip, etc.) realized that standard tolerances affect performance RF-Demoboard Beyond this, other substrate thickness possible (i.e. 800um, 1000um) however then, µStripelements have adapted this height.
G-Q8: there demands Loopfilter components
G-A5: obtaining best dynamic performance frequency drift recommended good quality external loopfilter capacitors. strongly recommend COG-type capacitors since these have leakage well dielectric absorption which important parameters systems using open-loop-modulation more details please have look Application Note "Loopfilter component calculations".
G-Q9: interface ATR2406 Microcontroller
G-A6: This short document intended describe micro controller connected with ATR2406. main focus exchange Data. This means data that transmitted sent from ATR2406 data, that received brought from ATR2406
Interfacing with ATR2406 synchronous UART
This possibility used SmartRF Firmware. This interfacing method very effective connect ATR2406 together. getting such system working, user configure maximum data rate ATR2406 enable clock recovery feature. maximum data rate only available when using UART synchronous mode. Configuration ATR2406: Enable clock recovery feature receiving Data. Disable clock recovery feature transmitting Data. Configuration UART: figure UART synchronous mode: UMSEL UCSRC Register. Baudrate register 1.152Mbps.
Rev. 26-Aug-04
PRELIMINARY INFORMATION
7(9)
PRELIMINARY INFORMATION
Interfacing with ATR2406 asynchronous UART
This method interfacing with ATR2406 enables user possible data rates except 1.152Mbps. Configuration ATR2406: Disable clock recovery feature time. Configuration UART: figure UART asynchronous mode: Clear UMSEL UCSRC Register. Baudrate register 576kbps, 288kbps,144kbps,72kbps. advantage using UART: Synchronisation onto incoming Data stream done automatically hardware.
Interfacing with ATR2406
This also possibility interfacing both chips, however very complex one, load increased heavily. generated software hardware does support possible data rates. Another problem synchronization onto incoming Data stream. This also handled software.
Interfacing with ATR2406 only software
this software handle things needed receive transmit data This only useful lower data rates adds overhead software.
ATR2406
Rev. 0.5, 26-Aug-04
ATR2406
Atmel Headquarters
Corporate Headquarters 2325 Orchard Parkway Jose, 95131 1(408) 441-0311 1(408) 487-2600 Europe Atmel Sarl Route Arsenaux Case Postale CH-1705 Fribourg Switzerland (41) 26-426-5555 (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza Mody Road Tsimhatsui East Kowloon Hong Kong (852) 2721-9778 (852) 2722-1369 Japan Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan (81) 3-3523-3551 (81) 3-3523-7581
Atmel Operations
Memory 2325 Orchard Parkway Jose, 95131 1(408) 441-0311 1(408) 436-4314 Microcontrollers 2325 Orchard Parkway Jose, 95131 1(408) 441-0311 1(408) 436-4314 Chantrerie 70602 44306 Nantes Cedex (33) 2-40-18-18-18 (33) 2-40-18-19-60 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France (33) 4-42-53-60-00 (33) 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, 80906 1(719) 576-3300 1(719) 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride 0QR, Scotland (44) 1355-803-000 (44) 1355-242-743 RF/Automotive Theresienstrasse Postfach 3535 74025 Heilbronn, Germany (49) 71-31-67-0 (49) 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, 80906 1(719) 576-3300 1(719) 540-1759 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom France Avenue Rochepleine 38521 Saint-Egreve Cedex, France (33) 4-76-58-30-00 (33) 4-76-58-34-80
e-mail literature@atmel.com Site http://www.atmel.com
Atmel Corporation 2003 Atmel Corporation makes warranty products, other than those expressly contained Company's standard warranty which detailed Atmel's Terms Conditions located Company's site. Company assumes responsibility errors which appear this document, reserves right change devices specifications detailed herein time without notice, does make commitment update information contained herein. licenses patents other intellectual property Atmel granted Company connection with sale Atmel products, expressly implication. Atmel's products authorized critical components life support devices systems. Atmel registered trademark Atmel. Other terms product names trademarks others.
Rev. 26-Aug-04
PRELIMINARY INFORMATION
9(9)

ISM-Transceiver ATR2406 This gives answers most often asked quest

Top Searches for this datasheet

Other recent searches