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參數(shù)資料
| 型號： | MICRF211AYQS |
| 廠商： | MICREL INC |
| 元件分類： | 消費家電 |
| 英文描述： | 3V, QwikRadio㈢ 433.92 MHz Receiver |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO16 |
| 封裝： | QSOP-16 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大?。?/td> | 815K |
| 代理商： | MICRF211AYQS |
Micrel
MICRF211
Crystal Y1 or Y1A (SMT or leaded respectively) is the
reference clock for all the device internal circuits.
Crystal characteristics of 10pF load capacitance,
30ppm, ESR < 50
, -40oC to +105oC temperature
range are desired. Table 5 shows the crystal
frequencies and one of Micrel’s approved crystal
manufacturers (www.hib.com.br).
The oscillator of the MICRF211 is a Colpitts type. It is
very sensitive to stray capacitance loads. Thus, very
good care must be taken when laying out the printed
circuit board. Avoid long traces and ground plane on
the top layer close to the REFOSC pins RO1 and
RO2. When care is not taken in the layout, and
crystals from other vendors are used, the oscillator
may take longer times to start as well as the time to
good data in the DO pin to show up. In some cases, if
the stray capacitance is too high (> 20pF), the
oscillator may not start at all.
The crystal frequency is calculated by REFOSC = RF
Carrier/(32+(1.1/12)). The local oscillator is low side
REFOSC (MHz)
12.15269
13.02519
13.52127
March 2007
10
M9999-030107
(408) 944-0800
injection (32 × 13.52127MHz = 432.68MHz), that is,
its frequency is below the RF carrier frequency and
the image frequency is below the LO frequency. See
Figure 6
. The product of the incoming RF signal and
local oscillator signal will yield the IF frequency, which
will be demodulated by the detector of the device.
Figure 6. Low Side Injection Local Oscillator.
Carrier (MHz)
390.0
418.0
433.92
HIB Part Number
SA-12.152690-F-10-H-30-30-X
SA-13.025190-F-10-H-30-30-X
SA-13.521270-F-10-H-30-30-X
Table 5. Crystal Frequency and Vendor Part Number.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MICRF211AYQS TR | 功能描述:射頻接收器 380MHz to 450MHz, 3.0V to 3.6V, 6mA, 10kbps, ASK Receiver with RSSI and Shutdown in 16-Lead QSOP (Lead-Free) RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| MICRF213 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V, QwikRadio㈢ 315MHz Receiver |
| MICRF213_11 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V, QwikRadio 315MHz Receiver |
| MICRF213AYQS | 功能描述:射頻接收器 300MHz to 350MHz, 3.0V to 3.6V, 7.2kbps, 4mA, ASK Receiver with RSSI, Shutdown in 16-Lead QSOP (Lead-Free) RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| MICRF213AYQS TR | 功能描述:射頻接收器 300MHz to 350MHz, 3.0V to 3.6V, 7.2kbps, 4mA, ASK Receiver with RSSI, Shutdown in 16-Lead QSOP (Lead-Free) RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
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