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| 型号： | MICRF219AYQS |
| 厂商： | Micrel Inc |
| 文件页数： | 14/23页 |
| 文件大小： | 0K |
| 描述： | IC RECEIVER QWIKRADIO 16-QSOP |
| 标准包装： | 98 |
| 频率： | 300MHz ~ 450MHz |
| 灵敏度： | -110dBm |
| 数据传输率 - 最大： | 10 kbps |
| 调制或协议： | ASK，OOK |
| 电流 - 接收： | 6mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
| 产品目录页面： | 571 (CN2011-ZH PDF) |
| 其它名称： | 576-3362-5 |
Micrel
MICRF219
Crystal Selection
Crystal Y1 or Y1A (SMT or lead ed respectively) is the
reference clock for all the device internal circuits.
Crystal characteristics of 10p F load capacitance,
30ppm, ESR < 50 ? , ? 40oC to +105oC temperature
range are desired. Table 4 shows Mi crel’s approved
crystal suppliers such as
( www.hib.com.br
or
http://www.abracon.com/ ) and the frequencies.
The oscillator of the MICRF219 i s a Pierce-type
oscillator. Good care must be taken when laying out
the printed circuit board. Avoi d long traces and place
the ground plane on the to p layer close to the
REFOSC pins RO1 and RO2. Wh en care is not taken
in the layout, and the crystals used are not verified,
the oscillator may take longer time to start. Time-to-
good-data in the DO pin will be longer as well. In
some cases, if the stray capa citance is too high (>
20pF). In this case, either the receiving central
frequency will offset too much o r the oscillator may not
start.
The crystal frequency is calculated by REFOS C = RF
Carrier/(32+(1.1/12)). The lo cal oscillator is low-side
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 7. 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 7. Low-Side Injection Local Oscillator
Figure 6. Plotting of Shunt Inductor and Series
Capacitor
June 2011
14
M9999-060811
(408) 944-0800
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MICRF219AYQS TR | 功能描述:射频接收器 QwikRadio Receiver (Not Recommended for New Designs) RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel |
| MICRF220 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:300MHz to 450MHz, 3.3V ASK/OOK Receiver with RSSI and Squelch |
| MICRF220-315-EV | 功能描述:EVAL BOARD FOR MICRF220 制造商:microchip technology 系列:- 零件状态:有效 类型:接收器 频率:315MHz 配套使用产品/相关产品:MICRF220 所含物品:板 标准包装:1 |
| MICRF220-433-EV | 功能描述:EVAL BOARD FOR MICRF220 制造商:microchip technology 系列:- 零件状态:有效 类型:接收器 频率:433.92MHz 配套使用产品/相关产品:MICRF220 所含物品:板 标准包装:1 |
| MICRF220AYQS | 功能描述:射频接收器 300MHz to 450MHz, 3.0V to 3.6V, 6mA, <10kbps ASK Receiver with RSSI and Shutdown RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel |
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