Micrel Semiconductor. Micrel requires that
the operating temperature range.
for crystal parameters. MICRF002/RF022 and MICRF011
crystal Q must be greater then 105,000. ESR must be 100鈩?/div>
or less.
Suggested Crystal Manufacturers
Quartztek
Contact: Michael Carpenito
Precision Crystal Products
20 South 48th Avenue
Phoenix, AZ 95043
tel: (602) 272-7944
fax: (602) 233-2440
www.quartztek.com
Crystal Frequency
Part Number
F002A48970
F002A60630
F002A64983
F002A67458
Transmit Frequency
315MHz
390MHz
418MHz
433.92MHz
Crystal Testing
The following is a quick crystal test and is only applicable with
the Micrel receiver. An oscilloscope with a 300MHz, 8pF
scope probe is all that is necessary to test the basic operation.
In the
ac-coupled mode,
monitor the REF OSC pin and note
the voltage. A sine wave of amplitude greater than
鹵300mV
peak-to-peak for the MICRF002/022/011 must be observed.
This takes into account the loading affect of the scope probe.
Using a heat gun, apply heat and note that the reference
oscillator has not stopped oscillating or decreased in voltage
by more than 20%.
Surface mount crystal have not yet been qualified. Contact
Micrel applications for further details.
4.8970MHz
6.0630MHz
6.4983MHz
6.7458MHz
Abracon Corp
Contact: Chris Polley
125 Columbia
Aliso Viejo, CA 92656
tel: (949) 448-7070
fax: (949) 448-8484
http://www.abracon.com
Crystal Frequency
4.8970MHz
6.0630MHz
6.4983MHz
6.7458MHz
Part Number
Transmit Frequency
315MHz
390MHz
418MHz
433.92MHz
Operating Frequency
Included are the common crystal frequencies used with the
Micrel receivers. Also included are the appropriate formulas.
Crystal accuracy must be to four decimal places.
AB-4.8970MHz-20-D
AB-6.0630MHz-20-D
AB-6.4983MHz-20-D
AB-6.7459MHz-20-D
f
LO
=
f
TX
f
T
=
f
LO
錚?/div>
f
錚?/div>
+
1.064
錚?/div>
TX
錚?/div>
錚?/div>
390
錚?/div>
64.50
Nominal f
TX
315.00MHz (f
T
= 4.8970MHz)
390.00MHz (f
T
= 6.0630MHz)
418.00MHz (f
T
= 6.4983MHz)
433.92MHz (f
T
= 6.7458MHz)
MMD Components
Contact: Jason Gann
32-B Mauchly
Irvine, CA 92618
tel: (949) 753-5888
fax: (949) 753-5889
www.mmdcomp.com
Crystal Frequency
4.8970MHz
6.0630MHz
6.4983MHz
6.7458MHz
Part Number
A15AC1-4.8970
A15AC1-6.0630
A15AC1-6.4983
A15AC1-6.7458
Transmit Frequency
315MHz
390MHz
418MHz
433.92MHz
continued鈥?/div>
QwikRadio is a trademark of Micrel, Inc. The QwikRadio ICs were developed under a partnership agreement with AIT of Orlando, Florida
Micrel, Inc. 鈥?1849 Fortune Drive 鈥?San Jose, CA 95131 鈥?USA 鈥?tel + 1 (408) 944-0800 鈥?fax + 1 (408) 944-0970 鈥?http://www.micrel.com
October 1999
1
Application Hint 35
APPLICATIONHINT35相關(guān)型號(hào)PDF文件下載
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