APPLICATIONHINT38 [ETC]
MICRF001 Crystal Selection ; MICRF001晶体选择\n
| 型号： | APPLICATIONHINT38 |
| 厂家： | 
ETC |
| 描述： | MICRF001 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 38
MICRF001 Crystal Selection
Micrel Crystal Suppliers
Suggested Crystal Manufacturers
The following crystal manufacturers have been approved by
Micrel Semiconductor. Micrel requires that approved crystal
manufacturers test their crystals 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-
tion for crystal parameters. MICRF001 crystal Q must be
greater then 115,000. 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
2.4107MHz
2.9847MHz
3.1990MHz
3.3208MHz
F002A24107
F002A29847
F002A31990
F002A33208
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 ±200mV
peak-to-peak for the MICRF001 must be observed. This
takes into account the loading effect 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 Pollie
125 Columbia
Aliso Viejo, CA 92656
Surface mount crystal have not yet been qualified. Contact
Micrel applications for further details.
tel: (949) 448-7070
fax: (949) 448-8484
http://www.abracon.com
Operating Frequency
Crystal Frequency Part Number Transmit 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
2.4107MHz AB-2.4107MHz-20-D
2.9847MHz AB-2.9847MHz-20-D
3.1990MHz AB-3.1990MHz-20-D
3.3208MHz AB-3.3208MHz-20-D
315MHz
390MHz
418MHz
433.92MHz
f
TX
2.00
f
=
LO
1+
390
MMD Components
Contact: Jason Gann
32-B Mauchly
f
LO
f =
, in MHz
T
130
Nominal f
Irvine, CA 92618
TX
315.00MHz (f = 2.4107MHz)
tel: (949) 753-5888
fax: (949) 753-5889
T
390.00MHz (f = 2.9847MHz)
T
www.mmdcomp.com
418.00MHz (f = 3.1990MHz)
T
433.92MHz (f = 3.3208MHz)
Crystal Frequency Part Number Transmit Frequency
T
2.4107MHz
2.9847MHz
3.1990MHz
3.3208MHz
A15AC1-2.4107
A15AC1-2.9847
A15AC1-3.1990
A15AC1-3.3208
315MHz
390MHz
418MHz
433.92MHz
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
January 2000
1
Application Hint 38
Application Hint 38
Micrel
ECS
Contact: Dan Kelly
1105 South Ridge View
Olathe, KS 66062
tel: (913) 782-7787 ext. 111
fax: (913) 732-6991
http://www.ecsxtal.com
Crystal Frequency Part Number Transmit Frequency
2.4107MHz ECS-24.107-CD-0151
2.9847MHz ECS-29.847-CD-0152
3.1990MHz ECS-31.990-CD-0153
3.3208MHz ECS-33.208-CD0154
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 38
2
January 2000
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