MICRF211AYQS Micrel Inc, MICRF211AYQS Datasheet

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... Encoded) • Analog RSSI Output • filter required • Excellent selectivity and noise rejection • Low external part count Ordering Information Part Number MICRF211AYQS 433.92 MHz, 1kHz Baud Rate Example MICRF211 ® 433.92 MHz Receiver Temperature Range Package – ...

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... Received signal strength indication output. Output is from a buffer with 200Ω typical output impedance Not Connected (Connect to Ground) 16 RO2 Reference resonator input connection to Colpitts oscillator stage, 7pF, in parallel with low resistance MOS switch-to-GND, during normal operation. Driven by startup excitation circuit during the internal startup control sequence. March 2007 MICRF211AYQS 2 MICRF211 M9999-030107 (408) 944-0800 ...

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Micrel Absolute Maximum Ratings Supply Voltage (V ) .................................................+5V DD Input Voltage .............................................................+5V Junction Temperature ......................................... +150ºC Lead Temperature (soldering, 10sec.) .................. 260°C Storage Temperature (T ) .....................-65ºC to +150°C S Maximum Receiver Input Power ........................+10dBm (3) ESD Rating .................................................. ...

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Micrel Demodulator Symbol Parameter CTH Source Impedance CTH Leakage Current Demodulator Filter Bandwidth @ 434MHz Digital / Control Functions DO pin output current Output rise and fall times RSSI RSSI DC Output Voltage Range RSSI response slope RSSI Output Current ...

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Micrel Typical Characteristics Sensitivity Graphs March 2007 5 MICRF211 M9999-030107 (408) 944-0800 ...

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Micrel Functional Diagram Functional Description Figure 1. Simplified Block Diagram that illustrates the basic structure of the MICRF211 made of three sub-blocks; Image Rejection UHF Down-converter, the OOK Demodulator, and Reference and Control Logics. Outside the device, the ...

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Micrel carrier from the IF signal. Post detection, the signal becomes base band information. low-pass filter further enhances the base band information. There are four programmable low-pass filter BW settings: 1625Hz, 3250Hz, 6500Hz, 13000Hz for 433.92MHz operation. Low pass filter ...

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Micrel Application Information The MICRF211 can be fully tested by using one of many evaluation boards designed at Micrel for this device entry level, the QR211HE1 (Figure 3) offers a good start for most applications. It has a ...

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Micrel Freq (MHz) C3 (pF) L2(nH) 390.0 1.5 47 418.0 1.5 43 433.92 1.5 39 Table 4: matching values for the most used frequencies For the frequency of 433.92MHz, the input impedance 18.6 – j174.2Ω, then the ...

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Micrel Crystal Y1 or Y1A (SMT or leaded respectively) is the reference clock for all the device internal circuits. Crystal characteristics of 10pF load capacitance, 30ppm, ESR < 50Ω, -40ºC to +105ºC temperature range are desired. Table 5 shows the ...

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Micrel JP1 and JP2 are the bandwidth selection for the demodulator bandwidth. To set it correctly necessary to know the shortest pulse width of the encoded data sent in the transmitter. Like in the example of the data ...

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Micrel considerably reduced. It will have more or less than shown in the figure below depending on the outside band noise. The penalty for using squelch is a delay in getting a good signal in the DO pin, that is, ...

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Micrel Figure 11. Time to Good Data, External Oscillator, Room Temperature. March 2007 13 MICRF211 M9999-030107 (408) 944-0800 ...

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Micrel PCB Considerations and Layout Figure below show some of the printed circuit layers for the QR211HE1 board. Use the Gerber files provided (downloadable from Micrel Website) which have the remaining layers needed to fabricate this board. ...

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Micrel Figure 15. QR211HE1 Bottom Silkscreen Layer, Mirror Image. March 2007 Figure 14. QR211HE1 Top Silkscreen Layer. Figure 16: QR211HE1 Dimensions. 15 MICRF211 M9999-030107 (408) 944-0800 ...

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... Coilcraft / Murata / L3 Coilcraft / Murata / R1,R2 HCM49 www.hib.com.br Y1A HC49 www.hib.com.br U1 MICRF211AYQS Micrel Semiconductor Table 10. QR211HE1 Bill of Materials, 433.92 MHz. March 2007 Description Helical PCB Antenna Pattern (np)50-ohm Ant 168mm 20 AWG, rigid wire MuRata 1.5pF , 0402/0603 0.1µF, 0402/0603 0.1µF, 0402/0603 Murata 5 ...

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Micrel Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, ...