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ATA5773C-PXQW PDF预览

ATA5773C-PXQW

更新时间: 2024-01-30 17:26:12
品牌 Logo 应用领域
美国微芯 - MICROCHIP 电信电信集成电路
页数 文件大小 规格书
190页 6336K
描述
Telecom Circuit, 1-Func

ATA5773C-PXQW 技术参数

是否Rohs认证: 符合生命周期:Active
包装说明:5 X 5 MM, 0.65 MM PITCH, MO-220, QFN-24Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.25JESD-30 代码:S-XQCC-N24
长度:5 mm功能数量:1
端子数量:24最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:UNSPECIFIED
封装代码:HVQCCN封装等效代码:LCC24,.19SQ,25
封装形状:SQUARE封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
电源:2.5/3.3 V认证状态:Not Qualified
筛选级别:AEC-Q100座面最大高度:1 mm
子类别:Other Telecom ICs最大压摆率:0.0141 mA
标称供电电压:3 V表面贴装:YES
电信集成电路类型:TELECOM CIRCUIT温度等级:INDUSTRIAL
端子形式:NO LEAD端子节距:0.65 mm
端子位置:QUAD宽度:5 mm
Base Number Matches:1

ATA5773C-PXQW 数据手册

 浏览型号ATA5773C-PXQW的Datasheet PDF文件第5页浏览型号ATA5773C-PXQW的Datasheet PDF文件第6页浏览型号ATA5773C-PXQW的Datasheet PDF文件第7页浏览型号ATA5773C-PXQW的Datasheet PDF文件第9页浏览型号ATA5773C-PXQW的Datasheet PDF文件第10页浏览型号ATA5773C-PXQW的Datasheet PDF文件第11页 
3.  
Functional Description  
Figure 1-1 on page 3 and Figure 1-2 on page 4 show the interconnections between the microcontroller and the RF part for a  
typical application. In the recommended application circuits the clock output of the RF transmitter is connected to the  
microcontroller in order to be able to generate data rate with tolerance lower than 3%. The transmitter’s crystal oscillator  
(XTO), phase locked loop (PLL) and clock generation are started using pin ENABLE. The power amplifier (PA) is activated  
using the connection to the pin PA_ENABLE. The FSK modulation is performed due to pulling of the crystal load capacitance  
for this purpose the microcontroller out put port together with an external switch applies this modulation technique. For the  
ASK modulation the power amplifier will be switched on and of by modulating the PA_ENABLE pin due to the data.  
To wake up the system from standby mode at least one event is required, which will be performed by pushing tone button.  
After this event the microcontroller starts up with the internal RC oscillator. For the TX operation the user software must  
additionally control just 2 pins, the pin ENABLE and pin PA_ENABLE. In case of the FSK modulation one additional  
connection from microcontroller is necessary to perform the pulling of the crystal load capacitance.  
If ENABLE and PA_ENABLE are set to LOW the transmitter is in standby mode with the suitable mode setting of the  
microcontroller (MCU) the power consumption will be reduced.  
If ENABLE is set to HIGH and PA_ENABLE to LOW, the XTO, PLL, and the Clock driver of the RF transmitter are activated  
and the VCO frequency is 32 times the XTO frequency. The Atmel ATA5771 and Atmel ATA5774 require typically shorter  
than 1 ms until the PLL is locked and the transmitter’s clock output is stable, while the Atmel ATA5773 requires time shorter  
than 3 ms for this progress.  
If both ENABLE and PA_ENABLE are set to HIGH the whole RF transmitter (XTO, PLL, Clock driver and power Amplifier) is  
activated. The ASK modulation is achieved by switching on and off the power amplifier via pin PA_ENABLE. The FSK  
modulation is performed by pulling the crystal load capacitor which will change the reference frequency of the PLL due to the  
data. The microcontroller modulates the load capacitance of the crystal using an external switch. A MOS transistor with a low  
parasitic capacitance is recommended to be used for this purpose. During the FSK modulation is the PA_ENABLE pin set to  
HIGH.  
To generate the data for the telegram the internal RC oscillator of the microcontroller is not accurate enough because this  
will be affected by ambient temperature and operating voltage. To reduce the variation of the data rate lower than 3% the  
clock frequency generated by the RF transmitter should be used as a reference. The MCU has to wait at least longer than  
3ms for ATA5773 after setting ENABLE to HIGH, before the clock output from the RF transmitter can be used. For ATA5771  
and ATA5774 the MCU must wait longer than 1 ms until the clock output is stable. The clock output with the crystal tolerance  
is connected to the timer0 of the MCU. This timer clocks the USI to generate the data rate. In the Two serial synchronous  
data transfer modes will be provided by USI. This will be pass out with different physical I/O ports, two wire mode is used for  
ASK and the three wire mode for FSK.  
3.1  
Frequency Generation  
In Atmel ATA5773 and Atmel ATA5774 the VCO is locked to 32 times crystal frequency hence the following crystal is  
needed  
9.8438MHz for 315MHz application  
13.56MHz for 433.92MHz application  
The VCO of ATA5771 is locked to 64 times crystal frequency therefore the necessary crystal frequency is  
13.5672MHz for 868.3MHz application  
14.2969MHz for 915MHz application  
Due to the high integration the PLL and VCO peripheral elements are integrated.  
The XTO is a series resonance oscillator that only one capacitor together with a crystal connected in series to GND are  
needed as external elements. Until the PLL and clock output is stable the following time can be expected  
3ms for ATA5773  
1ms for ATA5771 and ATA5774  
Therefore, a time delay of 3 ms for ATA5773 and 1ms for ATA5771/74 between activation of pin ENABLE and switching  
on the pin PA_ENABLE must be implemented in the software.  
8
ATA5771C/73C/74C [DATASHEET]  
9137I–RKE–08/14  

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