ATAB8402 Atmel, ATAB8402 Datasheet
ATAB8402
Specifications of ATAB8402
Related parts for ATAB8402
ATAB8402 Summary of contents
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... ATA8402 and 868 MHz to 928 MHz with ATA8403. The purpose of this application note is firstly to summarize some important hints for the design using these transmit- ters and secondly to describe the Atmel demo boards as well as the evaluation with the demo software. 2. Application Hints 2 ...
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For radiation, a loop antenna needs a strong current flowing through it in order to generate a magnetic field as the loop antenna is a magnetic antenna. The radiation resistance of the antenna is a primary determiner of the antenna’s ...
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The equivalent circuit for the loop antenna is shown in Figure 2-1. An estimation of the loop inductance is necessary to match the loop antenna. This value can be determined using a formula for inductance of a polygon of general ...
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The Power Amplifier (PA open collector output delivering a current pulse, which is nearly independent from the load impedance. Therefore, the output power can be controlled via the connected load impedance. To achieve the maximum output power, the ...
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Figure 2-4. Matching Loop Antenna to the Power Amplifier RF Choke Z load ANT1 PA C PA_Out ANT2 The parallel resonance impedance ( The variable r in the equation 9 describes the transformation ratio of the ...
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Figure 2-5. Caution: the formulas provide a theoretical start value for tuning of the real values on the appli- cation board. 2.2 Board Layout The decoupling measure of the power supply is very important to minimize any disturbance in the ...
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Figure 2-6 on page 6 metal shielding is used. These types of crystals generally have four pads. The two ground pads of the crystal must be connected to the board's ground plane properly. The connection between the crystal and the ...
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ASK (OOK) Transmission The load capacitor of the crystal (C1 in quency. For ASK modulation, the PA_ENABLE will be switched alternating between high and low voltage due to the data to be transmitted. This results in the switching on ...
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In real applications, there are stray capacitances on the board have to be taken into account when determining the load capacitance. If FSK modulation is used, the crystal-loaded resonance frequency is pulled by two different capacitance values (CL1 and CL2) ...
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... In real applications with the Atmel’s transmitters, the microprocessor starts with a RC oscillator to switch the transmitter. After the clock signal has stabilized, the microprocessor takes over the clock signal as reference. The demo board ATAB8401, ATAB8402, and ATAB8403 use Atmel’s microprocessor T48C893 3.1.2 Port Configuration of the Microprocessor The transmitter pins EN and PA_EN must be connected to the CMOS-compatible output stage ...
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... DC Feed Inductor for the Power Amplifier Atmel’s demo boards use a printed inductor on PCB (L1) to reduce the cost of the external com- ponents. This inductor provides a DC current for the open collector stage of the power amplifier. The value of L1 must be between 100 nH. Formula 18 gives approximation of the inductance for a printed inductor (see ...
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Schematic of the Demo Board Figure 3-2. The Schematic of the Demo Board BA2032SM + ...
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Demo Board’s Layout Figure 3-3. Figure 3-4. 9115A–INDCO–01/08 ATA8401/ATA8402/ATA8403 Top Layer of the Demo Board Bottom Layer of the Demo Board 13 ...
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... BOM List Table 3-2. Bill of Materials of the Demo Board ATAB8401 (315 MHz)/ATAB8402 (433.92 MHz)/ATAB8403-8 (868.3 MHz)/ATAB8403-9 (915 MHz) Components pcs C10 BR1 BR2 ATA8401/ATA8402/ATA8403 14 Components List Transmitter Application Board Value Tolerance ATAB8401 ATAB8402 X ATAB8403 X T48C893N 9.843750 MHz Order No ...
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... Table 3-2. Bill of Materials of the Demo Board (Continued) ATAB8401 (315 MHz)/ATAB8402 (433.92 MHz)/ATAB8403-8 (868.3 MHz)/ATAB8403-9 (915 MHz) Components pcs BR3 1 X BR4 1 X S1, S2 VBatt1 Lithium cell PCB jack PCB 9115A–INDCO–01/08 ATA8401/ATA8402/ATA8403 Components List Transmitter Application Board ...
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... T5750/53/54 is the same as for verification with ATA8401/ATA8402/ATA8403. (Figure 4-2 on page – Choose T5753 (315 MHz) for configuration of ATAB8401 – Choose T5754 (315 MHz) for configuration of ATAB8402 – Choose T5750 (868 MHz) for configuration of ATAB8403-8 – Choose T5750 (915 MHz) for configuration of ATAB8403-9 • ...
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Figure 4-1. Figure 4-2. 9115A–INDCO–01/08 ATA8401/ATA8402/ATA8403 ® Windows Interface of RF Design Kit Selecting the Setting of a Transmitter (Setting for ATAB5750-8 and ATAB8403-8) 17 ...
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Set the desired transmitter’s setting (see • Please follow the instructions below “Getting started evaluating the transmitter board” Figure 4-3. Several Setting Menu to Configure the Transmitter Getting started evaluating the transmitter board: • Insert the lithium cell battery ...
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Default configuration: • Modulation: FSK • Data Rate: 1 kBps • Test word: F09AF09A • Button functions: – S1 – S2 – S3 • Preburst length is set to the value matching the Polling setting of the suitable receiver. Reference: ...
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... Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI- TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ...