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MICRF011 Datasheet(PDF) 3 Page - Micrel Semiconductor |
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MICRF011 Datasheet(HTML) 3 Page - Micrel Semiconductor |
3 / 11 page QwikRadio tm 3 December 1998b MICRF011 MICRF011 Micrel SEL0 SEL1 Demodulator Bandwidth (Hz) SWP Mode FIXED Mode 1 1 5000 10000 0 1 2500 5000 1 0 1250 2500 0 0 625 1250 Table 1 Nominal Demodulator (Baseband) Filter Bandwidth vs. SEL0, SEL1 and Mode No . Design Change Retrofit Design Action 1. Local Oscillator sweep range reduced 2X. Affects SWP mode only. Reconsider Tx/Rx Frequency Alignment Error Budget, per App. Note 22. If alignment tolerances cannot be met, consider: (1) tighten ceramic resonator tolerance, (2) replace ceramic resonator with crystal, or (3) not to upgrade to -011 2. Local Oscillator sweep rate reduced 2X. Affects SWP mode only. Impacts SWP mode maximum data rate. If data rate constraint cannot be met, consider (1) reduce system data rate by 2X, or (2) not to upgrade to -011 3. IF Center Frequency reduced 2X. Affects both modes SWP and FIXED. Factor this change into Tx/Rx Frequency Alignment Error Budget. FIXED mode users of -001 must change crystal frequency. 4. IF Bandwidth reduced 2X. Affects both modes SWP and FIXED. Factor this change into Tx/Rx Frequency Alignment Error Budget. 5. FIXED mode Demod Filter cutoff frequencies increased 2X. Affects FIXED mode only. For FIXED mode only, choose next lower filter frequency (via control pins SEL0/1), to maintain same range performance 6. CTH Pin Impedance 118k Ω @ ft=4.90 MHz [see Note 4]. Affects both modes SWP and FIXED. Recompute appropriate value of CTH capacitor, and change value on PCB Table 2 MICRF001/011 Change List and Design Retrofit Guidelines |
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