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Holtek BC2401, Инструкции по применению, Страница: 8 / 8

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BC2401 Application Guidelines

 

 

AN0435E  V1.00 

8/ 

8

 

December 11, 2016 

Governing Law 

The Disclaimer contained in the website shall be governed by and interpreted in 
accordance with the laws of the Republic of China. Users will submit to the non-exclusive 
jurisdiction of the Republic of China courts. 

Update of Disclaimer 

Holtek reserves the right to updat 

e the Disclaimer at any time with or without prior notice, all changes are effective 
immediately upon posting to the website. 

Содержание BC2401

Страница 1: ...st time are often faced with some difficult problems during product design Holtek has prepared solutions including some frequently asked questions based on their past experience to help engineers to quickly understand the RF receiver operation to overcome these initial problems This application note will show how to use the BC2401 using specific examples Functional Description The BC2401 is a supe...

Страница 2: ...50MHz Symbol rate 5Kbps High sensitivity 100dBm 5V 0 1 BER 315MHz 433MHz Operating current consumption less than 4mA Integrated LNA and super regeneration oscillator Small package type 8 pin SOP Application Circuits Note Special attention should be paid to three parts in the circuit The first part is the antenna part labeled with ANT1 the second part is the high frequency input matching circuit wh...

Страница 3: ...MD 0507U 3 5T S BR LC Tank Selection Guides The BC2401 reception frequency is setup by inductors and capacitor connected between Pins 7 and Pin 6 as shown below The relationship between the inductor capacitor and the frequency setup is shown as follows 6 3 2 1 C L f Frequency π Users should initially decide upon their desired reception frequency before choosing the component values After determini...

Страница 4: ...gnals as well as requiring an antenna an impedance matching circuit is also required as shown in the following figure Good impedance matching can reduce noise thus improving reception sensitivity A network analyzer will normally be required to adjust the impedance matching The selected capacitor and inductor should have high Q values for improved reception sensitivity The recommended values for th...

Страница 5: ...between these components should be placed as close as possible to the device to minimise the wire length Enough space must be reserved for the extra width of the VCC and GND traces Routing As right angle routing tracks accumulate charges more readily and may affect PCB stability it is better to use 45 degree bevel or arc angles as far as possible when routing The distance between two traces should...

Страница 6: ...have poured copper traces to avoid adversely affecting the RF performance The RF matching components should have poured copper traces to increase stability With the exception of RF matched components other components should not be located near the antenna to reduce interference on the RF circuits PCB Layout Example Top View Bottom View ...

Страница 7: ...ctor Inc herein after Holtek the company us we or our Whilst Holtek endeavors to ensure the accuracy of the Information on this website no express or implied warranty is given by Holtek to the accuracy of the Information Holtek shall bear no responsibility for any incorrectness or leakage Holtek shall not be liable for any damages including but not limited to computer virus system problems or data...

Страница 8: ...d by and interpreted in accordance with the laws of the Republic of China Users will submit to the non exclusive jurisdiction of the Republic of China courts Update of Disclaimer Holtek reserves the right to updat e the Disclaimer at any time with or without prior notice all changes are effective immediately upon posting to the website ...

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