MICRF211 Micrel Semiconductor, MICRF211 Datasheet
MICRF211
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MICRF211 Summary of contents
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... General Description The MICRF211 is a general purpose, 3V QwikRadio Receiver that operates at 433.92MHz with typical sensitivity of -110dBm. The MICRF211 functions as a super-heterodyne receiver for OOK and ASK modulation up to 10kbps. The down-conversion mixer also provides image rejection. All post-detection data filtering is provided on the MICRF211 ...
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... NC 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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... V(REFOSC (2) ) ..............................+3.0V to +3. ................. –40°C to +105°C A )........................................ 3.6V (Max 0.1µ 433.92 MHz, unless otherwise TH RX Min Typ 6.0 0.5 20 1.2 -110 330 19 – j174 20 0.1 ± 2 ± 800 1.15 1.70 13.52127 300 0.2 3.5 MICRF211 Max Units mA µA dB MHz dBm kHz Ω MHz kΩ 1.5 Vp-p µA M9999-030107 (408) 944-0800 ...
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... Min Typ 120 ± 2 ± 800 1625 260 600 2 0 400 200 0.3 -2 BER (bit error rate). The input signal 50msec/(200msec)=25 the (Average QUIET ON M9999-030107 (408) 944-0800 MICRF211 Max Units kΩ 13000 Hz µA µsec V mV/dB µA Ω sec ...
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... Micrel www.DataSheet4U.com Typical Characteristics Sensitivity Graphs March 2007 5 MICRF211 M9999-030107 (408) 944-0800 ...
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... 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 MICRF211 requires only three components to operate: two capacitors (CTH, and CAGC) and the reference frequency device, usually a quartz crystal ...
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... MICRF211. oscillation crystal. Reference oscillator crystal frequency can be calculated: F REF OSC For 433.92 MHz operate the MICRF211 with minimum offset, crystal frequencies should be specified with 10pF loading capacitance. 7 The voltage developed on the CAGC Figure 2: Reference Oscillator Circuit R01 and R02 are external pins of ...
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... Micrel www.DataSheet4U.com 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 helical PCB antenna with its matching network, a band-pass-filter front-end as a pre-selector filter, ...
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... We can see the matching 39 18.6 – j174.2 leading to the center of the Smith Chart or close to 50Ω ( (2×Pi× (2×Pi×f×Xm) 9 Figure 4: device’s input impedance 18.6 – j174.2Ω Figure 5. Plotting the Shunt Inductor and Series Capacitor. MICRF211 M9999-030107 (408) 944-0800 ...
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... Table 5 shows the crystal frequencies and one of Micrel’s approved crystal manufacturers (www.hib.com.br). The oscillator of the MICRF211 is a Colpitts type very sensitive to stray capacitance loads. Thus, very good care must be taken when laying out the printed circuit board. Avoid long traces and ground plane on the top layer close to the REFOSC pins RO1 and RO2 ...
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... JP1 JP2 BW (hertz) Short Short 1625 Open Short 3250 Short Open 6500 Open Open 13000 Table 9. Suggested C and C TH MICRF211 Maximum baud rate for 50% Duty Cycle (Hertz) 1123 2246 4493 8987 respectively AGC Cth Cagc 100nF 4.7µF 47nF 2.2µF 22nF 1µF 10nF 0.47µ ...
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... When using an external oscillator or reference oscillator signal, the time is reduced considerably and can be around 140µsec. See Figures Figure 10 and 11. Figure 10: Time-to-Good Data After Shut Down Cycle, 12 MICRF211 capacitor AGC (SHDN = 1), the device is DD Room Temperature. ...
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... Micrel www.DataSheet4U.com Figure 11. Time to Good Data, External Oscillator, Room Temperature. March 2007 13 MICRF211 M9999-030107 (408) 944-0800 ...
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... RF circuits. Avoid thick traces, the higher the frequency, the thinner the trace should be in order to minimize Each ground losses in the RF path. Figure 12. QR211HE1 Top Layer. Figure 13. QR211HE1 Bottom Layer, Mirror Image. 14 MICRF211 lines from other DD M9999-030107 (408) 944-0800 ...
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... Micrel www.DataSheet4U.com 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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... ACT1 Coilcraft / Murata / 30nH 2%, 0402/0603 ACT1 (np) 0402, not placed Vishay 100kΩ , 0402 www.hib.com.br (np)13.52127MHz Crystal www.hib.com.br 13.52127MHz Crystal QSOP16 Table 10. QR211HE1 Bill of Materials, 433.92 MHz. 16 168mm 20 AWG, rigid wire MICRF211 Qty ...
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... A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. March 2007 QSOP16 Package Type (AQS16) © 2007 Micrel, Incorporated. 17 MICRF211 M9999-030107 (408) 944-0800 ...
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... Micrel www.DataSheet4U.com Revision History Date Edits by: March 2007 18 MICRF211 Revision Number M9999-030107 (408) 944-0800 ...