APPLICATIONHINT35 [ETC]
MICRF002/RF022/RF011 Crystal Selection ; MICRF002 / RF022 / RF011晶体选择\n
| 型号： | APPLICATIONHINT35 |
| 厂家： | 
ETC |
| 描述： | MICRF002/RF022/RF011 Crystal Selection
|
| 文件： | 总2页 (文件大小：21K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Application Hint 35
MICRF002/RF022/RF011 Crystal Selection
by Joe Leon
Micrel Crystal Suppliers
Suggested Crystal Manufacturers
The following crystal manufacturers have been approved by
Micrel Semiconductor. Micrel requires that approved crystal
manufacturers test their crystal with the Micrel receiver over
the operating temperature range.
Quartztek
Contact: Michael Carpenito
Precision Crystal Products
20 South 48th Avenue
Phoenix, AZ 95043
Please refer to Application Note 32: Receiver Crystal Selec-
tionforcrystalparameters.MICRF002/RF022andMICRF011
crystal Q must be greater then 105,000. ESR must be 100Ω
or less.
tel: (602) 272-7944
fax: (602) 233-2440
www.quartztek.com
Crystal Frequency Part Number Transmit Frequency
Crystal Testing
4.8970MHz
6.0630MHz
6.4983MHz
6.7458MHz
F002A48970
F002A60630
F002A64983
F002A67458
315MHz
390MHz
418MHz
433.92MHz
The following is a quick crystal test and is only applicable with
the Micrel receiver. An oscilloscope with a 300MHz, 8pF
scopeprobeisallthatisnecessarytotestthebasicoperation.
In the ac-coupled mode, monitor the REF OSC pin and note
the voltage. A sine wave of amplitude greater than ±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%.
Abracon Corp
Contact: Chris Polley
125 Columbia
Aliso Viejo, CA 92656
tel: (949) 448-7070
fax: (949) 448-8484
Surface mount crystal have not yet been qualified. Contact
Micrel applications for further details.
http://www.abracon.com
Crystal Frequency Part Number Transmit Frequency
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.
4.8970MHz AB-4.8970MHz-20-D
6.0630MHz AB-6.0630MHz-20-D
6.4983MHz AB-6.4983MHz-20-D
6.7458MHz AB-6.7459MHz-20-D
315MHz
390MHz
418MHz
433.92MHz
f
TX
f
= f +1.064
LO
TX
390
MMD Components
Contact: Jason Gann
32-B Mauchly
f
LO
f =
T
64.50
Irvine, CA 92618
Nominal f
TX
tel: (949) 753-5888
fax: (949) 753-5889
315.00MHz (f = 4.8970MHz)
T
390.00MHz (f = 6.0630MHz)
T
www.mmdcomp.com
418.00MHz (f = 6.4983MHz)
T
Crystal Frequency Part Number Transmit Frequency
433.92MHz (f = 6.7458MHz)
T
4.8970MHz
6.0630MHz
6.4983MHz
6.7458MHz
A15AC1-4.8970
A15AC1-6.0630
A15AC1-6.4983
A15AC1-6.7458
315MHz
390MHz
418MHz
433.92MHz
continued…
QwikRadio is a trademark of Micrel, Inc. The QwikRadio ICs were developed under a partnership agreement with AIT of Orlando, Florida
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
October 1999
1
Application Hint 35
Application Hint 35
Micrel
ECS
Contact: Dan Kelly
1105 South Ridgeview
Olathe, KS 66062
tel: (913) 782-7787 ext. 111
fax: (913) 732-6991
http://www.ecsxtal.com
Crystal Frequency Part Number Transmit Frequency
4.8970MHz ECS-48.97-CD-0065
6.0630MHz ECS-60.63-CD-0066
6.4983MHz ECS-64.983-CD-0067
6.7458MHz ECS-67.458-CD0068
315MHz
390MHz
418MHz
433.92MHz
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 1999 Micrel Incorporated
Application Hint 35
2
October 1999
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