收藏本站
AN588
7. Ultra Low Power Wireless Sensor
The Si1012 Wireless MCU is used for the sensing and RF transmission functions of this reference design. In sleep
mode, the Si1012 supply current is approximately 50 nA. When the MCU is awoken from sleep mode using the
push button switch, it samples the current temperature using the on-chip temperature sensor, the remaining charge
in the thin film battery, and the amount of ambient light at the solar cell. The temperature and remaining charge are
transmitted over the RF connection once per button press. The light level is transmitted once a second for three
minutes.
One of the distinguishing features of the Si1012 which makes it excellent for energy harvesting applications is its
ultra low power consumption both in sleep and active modes. Figure 9 shows a simplified activity profile for the
active mode (RF packet transmission once a second). The peak current is 29 mA when the RF transmitter is
enabled and the average current over the three minute time interval is 51 μA (1 packet per second).
29 mA
19 mA
Active Mode
TX
Active Mode
Rx
Active Mode
TX
Active Mode
Rx
0.8 uA
RTC Sleep
RTC Sleep
1 mS
1 mS
998 mS
1 mS
1 mS
998 mS
Figure 9. Activity Profile While Transmitting
The wireless sensor node uses a 919.84 MHz RF link based on the EZMAC ? PRO software library. The RF link
data rate is 128 kbps using GFSK modulation (EZRadioPRO channel 19). The output power is +13 dB. The Sensor
Node will decrease the output power when the charge on the thin film battery drops below 75%. The printed
antenna on the Sensor Node is designed on a 2-layer PCB in order to achieve the lowest possible cost. The
expected range with the printed antenna is 100–300 feet (line of sight).
Rev. 0.2
7
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
EPC9001 BOARD DEV FOR EPC2015 40V GAN
EPC9002 BOARD DEV FOR EPC2001 100V GAN
EPC9003 BOARD DEV FOR EPC2010 200V GAN
EPX APPLICATOR-400ML APPLICATOR PNEUMATIC FOR 400ML
ES260XP SURGE ARRESTER 220-320V GASTUBE
ESD5V3U4RRS E6327 DIODE ESD ARRAY 5.3V SOT-363
ESDU03A12VR17V SUPPRESSOR ESD 0.05PF 12VDC 0603
EV-ADF4108EB1Z BOARD EVAL FOR ADF4108EB1Z
相关代理商/技术参数
EN-ESR-1221N2 制造商:L-com Inc 功能描述:2.4GHz wirelessN Router 300Mbp
EN-ESR-600H 制造商:L COM 功能描述:HP dualband wireless N Router 制造商:L-com Inc 功能描述:HP dualband wireless N Router
ENF1001-3PB6 功能描述:开关配件 ENF1001-3PB6 RoHS:否 制造商:C&K Components 类型:Cap 用于:Pushbutton Switches 设计目的:
ENF1001-3TB8 功能描述:开关配件 TRAN DISCON NONFUSED RoHS:否 制造商:C&K Components 类型:Cap 用于:Pushbutton Switches 设计目的:
ENF1002-3PB6 功能描述:开关配件 ENF1002-3PB6 RoHS:否 制造商:C&K Components 类型:Cap 用于:Pushbutton Switches 设计目的:
ENF1002-3PB610 功能描述:开关配件 ENCL DISC NON-FUSED RoHS:否 制造商:C&K Components 类型:Cap 用于:Pushbutton Switches 设计目的:
ENF1002-3PB610G 功能描述:开关配件 ENCL DISC NON-FUSED RoHS:否 制造商:C&K Components 类型:Cap 用于:Pushbutton Switches 设计目的:
ENF1002-4PB6 功能描述:开关配件 4P DISC NONFUSE RoHS:否 制造商:C&K Components 类型:Cap 用于:Pushbutton Switches 设计目的: