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參數(shù)資料
| 型號： | MICRF011BN |
| 廠商： | MICREL INC |
| 元件分類： | 消費家電 |
| 英文描述： | QwikRadiotm Receiver/Data Demodulator Preliminary Information |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP14 |
| 封裝： | DIP-14 |
| 文件頁數(shù)： | 3/11頁 |
| 文件大?。?/td> | 147K |
| 代理商： | MICRF011BN |
QwikRadio
tm
3
December 1998b
MICRF011
MICRF011
Micrel
SEL0
SEL1
Demodulator Bandwidth (Hz)
SWP Mode
FIXED Mode
5000
10000
2500
5000
1250
2500
625
1250
1
0
1
0
1
1
0
0
Table 1
Nominal Demodulator (Baseband) Filter Bandwidth
vs. SEL0, SEL1 and Mode
No
.
1.
Design Change
Retrofit Design Action
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
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
Factor this change into Tx/Rx Frequency Alignment Error Budget.
FIXED mode users of -001 must change crystal frequency.
2.
Local Oscillator sweep rate reduced
2X. Affects SWP mode only.
3.
IF Center Frequency reduced 2X.
Affects both modes SWP and
FIXED.
IF Bandwidth reduced 2X. Affects
both modes SWP and FIXED.
FIXED mode Demod Filter cutoff
frequencies increased 2X. Affects
FIXED mode only.
CTH Pin Impedance
118k
@ ft=4.90 MHz [see Note 4].
Affects both modes SWP and
FIXED.
4.
Factor this change into Tx/Rx Frequency Alignment Error Budget.
5.
For FIXED mode only, choose next lower filter frequency (via control pins
SEL0/1), to maintain same range performance
6.
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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