- 您现在的位置：买卖IC网 > PDF目录18737 > MAX7032ATJ+T (Maxim Integrated)IC TRASCEIVER ASK/FSK 32TQFN PDF资料下载
参数资料
| 型号： | MAX7032ATJ+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/32页 |
| 文件大小： | 0K |
| 描述： | IC TRASCEIVER ASK/FSK 32TQFN |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 频率： | 300MHz ~ 450MHz |
| 数据传输率 - 最大： | 33kbps |
| 调制或协议： | ASK，FSK，OOK |
| 应用： | 车库门开启器，遥控，双向 RKE |
| 功率 - 输出： | 10dBm |
| 灵敏度： | -114dBm |
| 电源电压： | 2.1 V ~ 3.6 V，4.5 V ~ 5.5 V |
| 电流 - 接收： | 6.7mA |
| 电流 - 传输： | 12.5mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页当前第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
Low-Cost, Crystal-Based, Programmable,
ASK/FSK Transceiver with Fractional-N PLL
The configuration shown in Figure 2 can create a
Butterworth or Bessel response. The Butterworth filter
offers a very flat amplitude response in the passband
and a rolloff rate of 40dB/decade for the two-pole filter.
The Bessel filter has a linear phase response, which
works well for filtering digital data. To calculate the
value of the capacitors, use the following equations,
along with the coefficients in Table 1:
MAX7032
100k Ω
RSSI OR
FSK DEMOD
100k Ω
C F 1 =
b
a ( 100 k Ω )( π )( f C )
DS+
C F2
OP+
DF
C F1
C F 2 =
a
4 ( 100 k Ω )( π )( f C )
Figure 2. Sallen-Key Lowpass Data Filter
where f C is the desired 3dB corner frequency.
For example, choose a Butterworth filter response with
a corner frequency of 5kHz:
MAX7032
1 . 000
C F 1 = ≈ 450 pF
( 1 . 414 )( 100 k Ω )( 3 . 14 )( 5 kHz )
1 . 414
C F 2 = ≈ 225 pF
( 4 )( 100 k Ω )( 3 . 14 )( 5 kHz )
DATA
SLICER
Choosing standard capacitor values changes C F1 to
DATA
DS-
R
DS+
470pF and C F2 to 220pF. In the Typical Application Circuit,
C F1 and C F2 are named C16 and C17, respectively.
Data Slicer
The data slicer takes the analog output of the data filter
and converts it to a digital signal. This is achieved by
using a comparator and comparing the analog input to
a threshold voltage. The threshold voltage is set by the
voltage on the DS- pin, which is connected to the nega-
tive input of the data-slicer comparator.
Numerous configurations can be used to generate the
data-slicer threshold. For example, the circuit in Figure
3 shows a simple method using only one resistor and
one capacitor. This configuration averages the analog
output of the filter and sets the threshold to approxi-
mately 50% of that amplitude. With this configuration,
the threshold automatically adjusts as the analog signal
varies, minimizing the possibility for errors in the digital
data. The values of R and C affect how fast the thresh-
old tracks the analog amplitude. Be sure to keep the
corner frequency of the RC circuit much lower (about
10 times) than the lowest expected data rate.
With this configuration, a long string of NRZ zeros or ones
can cause the threshold to drift. This configuration works
C
Figure 3. Generating Data Slicer Threshold Using a Lowpass
Filter
best if a coding scheme, such as Manchester coding,
which has an equal number of zeros and ones, is used.
Figure 4 shows a configuration that uses the positive and
negative peak detectors to generate the threshold. This
configuration sets the threshold to the midpoint between
a high output and a low output of the data filter.
Peak Detectors
The maximum peak detector (PDMAX) and minimum
peak detector (PDMIN), with resistors and capacitors
shown in Figure 4, create DC output voltages equal to
the high and low peak values of the filtered ASK or FSK
demodulated signals. The resistors provide a path for
the capacitors to discharge, allowing the peak detec-
tors to dynamically follow peak changes of the data fil-
ter output voltages.
______________________________________________________________________________________
15
相关PDF资料 |
PDF描述 |
|---|---|
| 7C-25.000MBB-T | OSC 25.000 MHZ 3.3V SMD |
| MAX2831ETM+T | IC TXRX 2.4GHZ-2.5GHZ 48TQFN |
| X-10GQ | SWITCH BASIC PNL MT 10A SOLDER |
| B82802A0030A220 | TRANSFORMER FLYBACK 36-60V SMD |
| MAX7030LATJ+T | IC ASK TXRX 315MHZ 32-TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7032ETJ | 制造商:Maxim Integrated Products 功能描述: |
| MAX7032EVKIT-315 | 功能描述:射频开发工具 MAX7032 Eval Kit RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| MAX7032EVKIT-433 | 功能描述:射频开发工具 MAX7032 Eval Kit RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| MAX7032EVSYS-315 | 功能描述:射频开发工具 MAX7032 Eval Kit RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| MAX7032EVSYS-433 | 功能描述:射频开发工具 MAX7032 Eval Kit RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
发布紧急采购，3分钟左右您将得到回复。