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参数资料
| 型号： | MICRF218AYQS TR |
| 厂商： | Micrel Inc |
| 文件页数： | 14/23页 |
| 文件大小： | 0K |
| 描述： | IC RCVR QWIKRADIO 3.3V 16QSOP |
| 标准包装： | 2,500 |
| 频率： | 300MHz ~ 450MHz |
| 灵敏度： | -108dBm |
| 数据传输率 - 最大： | 10 kbps |
| 调制或协议： | AM |
| 应用： | ISM，车库门开启器，RKE |
| 电流 - 接收： | 5.5mA |
| 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 ~ 85°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 带卷 (TR) |
Micrel
Application Information
Figure 7. QR218HE1 Application Example, 433.92 MHz, Narrow Band
MICRF218
The MICRF218 can be fully tested by using one of
Products application note.
many evaluation boards designed at Micrel for this
device. As simple demonstrator, the QR218HE1
(Figure 7) offers a good start for most applications. It
has a helical PCB antenna with its matching network,
a bandpass-filter front-end as a pre-selector filter,
matching network and the minimum components
required to make the device work, which are a crystal,
Freq (MHz)
315.0
390.0
418.0
433.92
C9 (pF)
1.2
1.2
1.2
1.5
L3(nH)
75
43
36
30
f ?
Cagc, and Cth capacitors.
The matching network of the helical PCB antenna (C9
and L3) can be removed and a whip antenna (ANT2)
or a RF connector (J2) can be used instead. Figure 7
shows the entire schematic of it for 433.92MHz. Other
frequencies can be used. Matching network values
for other frequencies are listed in the tables below.
Capacitor C9 and inductor L3 are the passive
elements for the helical PCB matching network. Tight
tolerance is recommended for these devices, like 2%
for the inductor and 0.1pF for the capacitor. PCB
variations may require different component values and
optimization. Table 2 shows the matching elements
for the device frequency range. For additional
information look for Small PCB Antennas for Micrel RF
Table 2. Matching Values for the Helical PCB Antenna
If whip antenna is used, remove C9 and place the
whip antenna in the hole provided in the PCB. Also,
RF signal can be injected there (add RF connector).
L1 and C8 form the pass-band-filter front-end. Its
purpose is to attenuate undesired outside band noise
which reduces the receiver performance. It is
calculated by the parallel resonance equation:
1
(2 * ? L1 * C8)
November 2011
14
M9999-111111
(408) 944-0800
相关PDF资料 |
PDF描述 |
|---|---|
| MICRF219AAYQS TR | IC RECEIVER QWIKRADIO 16QSOP |
| MICRF219AYQS TR | IC RECEIVER QWIKRADIO 16QSOP |
| MICRF220AYQS TR | RCVR ASK/OOK 300-450MHZ 16QSOP |
| MICRF221AYQS TR | IC RF RECEIVER QWIKRADIO 16-QSOP |
| MICRF300YC6 TR | IC AMP 100/1000MHZ LN SC70-6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MICRF219 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:300MHz to 450MHz ASK Receiver with RSSI, Auto-Poll, Bit-Check and Squelch |
| MICRF219_11 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:300MHz to 450MHz ASK Receiver with RSSI, Auto-Poll, Bit-Che |
| MICRF219A-315-EV | 功能描述:EVAL BOARD FOR MICRF219A 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:MICRF219A 所含物品:板 标准包装:1 |
| MICRF219A-433 EV | 制造商:Micrel Inc 功能描述:evaluation board for MICRF219A |
| MICRF219A-433-EV | 功能描述:EVAL BOARD FOR MICRF219A 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:MICRF219A 所含物品:板 标准包装:1 |
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