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