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参数资料
| 型号： | MICRF219AYQS |
| 厂商： | Micrel Inc |
| 文件页数： | 17/23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
Three other pins are worthy of comment. Th ey are the
DO, RSSI, and shutdown pins. The DO pin has a
driving capability of 0.4mA. This is good enough for
most of the logic family ICs on the market today. The
RSSI pin provides a transfer function of the RF signal
intensity versus voltage. It is very useful to determine
the signal-to-noise ratio of the RF link, crude range
estimate from the transmitter source and AM
demodulation, which requires a low C AGC capacitor
value.
The shutdown pin (SHDN) is useful to sa ve energy.
Making its level close to V DD (SHDN = 1), th e de vi c e is
not in operation. Its DC current consumpt ion is less
than 1μA (do not forget to remove R3). Wh en toggling
from high to low, there will be a time requ ired f or the
device to come to steady-state mode, and a tim e for
data t o show up in the DO pin. This time w ill be
dependent upon many things such as tempe rature,
the crystal used, and if there is an external os cillator
with faster startup time. See Figure 11 and Figu re 12
or time-to-good-data on both 433.92MHz and 31 5MHz
versions.
MICRF219
Figure 12. Time-to-Good-Data a fter Shutdown Cycle,
315MHz at Room Te mperature
Serial Register Programming
Programming the device is accompli shed by the use
of pins DO and SCLK. Norm ally, D0 (Pin 10) is
outputting data and needs to switch to an input pin
ma de by the start sequence, as shown at Figure 13.
High at the SCLK pin tri-states the DO pin, enabling
the external drive into the DO pin with an initial low
level. The start sequence is completed by taking
SCLK low, then high while DO is low, followed by
taking DO high, then low while SCLK is high. The
serial interface is initialized and ready to receive the
programming data.
T6
T7
BIT TIME 0
BIT TIME 1
BIT TIME 2
SCLK
T1
T2
T4
T5
T8
T9
T3
“19”
“0”
“0”
“1”
DO AS
DO INPUT BITS:
D19
D18
D17
OUTPUT
Figure 11. Time-to-Good-Data after Shutdown Cycle,
433.92MHz, Room Temperature
Figure 13. Serial Interface Start Sequence
June 2011
17
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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