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| 型号： | MAX1471EVKIT-433 |
| 厂商： | Maxim Integrated |
| 文件页数： | 12/26页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX1471 433MHZ |
| 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： | 1 |
| 类型： | 接收器，ASK/FSK |
| 频率： | 433MHz |
| 适用于相关产品： | MAX1471 ~ 433 MHz |
| 已供物品： | 板 |
315MHz/434MHz Low-Power, 3V/5V
ASK/FSK Superheterodyne Receiver
3.0V
V DD
ASK DATA OUT
SCLK
DIO
C26
*
V DD
CS
FSK DATA OUT
32
31
30
29
28
27
26
25
C5
R3
1
DSA-
DVDD
24
V DD
C23
2
3
DSA+
OPA+
DGND
23
C4
C3
DFF
22
C14
4
5
DFA
XTAL2
MAX1471
OPF+
21
C21
C22
Y1
V DD
C15
6
XTAL1
EXPOSED PAD
DSF+
20
R8
7
AVDD
DSF-
19
C27
C6
RF INPUT
L1
8
LNAIN
PDMAXF
PDMINF
18
17
*
C7
9
10
11
12
13
14
15
16
L3
C11
C9
C8
V DD
C12
L2
Figure 2. Typical Application Circuit
C10
IN GND
Y2
OUT
*SEE LAST PARAGRAPH OF
PEAK DETECTORS SECTION
Data Filters
The data filters for the ASK and FSK data are imple-
mented as a 2nd-order lowpass Sallen-Key filter. The
pole locations are set by the combination of two on-
chip resistors and two external capacitors. Adjusting
the value of the external capacitors changes the corner
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 2:
frequency to optimize for different data rates. The cor-
ner frequency in kHz should be set to approximately
1.5 times the fastest expected Manchester data rate in
kbps from the transmitter. Keeping the corner frequen-
cy near the data rate rejects any noise at higher fre-
quencies, resulting in an increase in receiver sensitivity.
C F1 =
C F2 =
b
a ( 100 k )( π )( f C )
a
4 ( 100 k )( π )( f C )
The configuration shown in Figure 3 can create a
Butterworth or Bessel response. The Butterworth filter
offers a very flat amplitude response in the passband
where f C is the desired 3dB corner frequency.
For example, choose a Butterworth filter response with
a corner frequency of 5kHz:
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1471EVSYS-315 | 功能描述:射频开发工具 MAX1471 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 |
| MAX1471EVSYS-433 | 功能描述:射频开发工具 MAX1471 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 |
| MAX1472AKA | 制造商:Maxim from Components Direct 功能描述:MAXIM MAX1472AKA RF ICS MISC - Tape and Reel 制造商:Maxim 功能描述:Maxim MAX1472AKA RF ICs Misc |
| MAX1472AKA+ | 制造商:Maxim Integrated Products 功能描述:LOW-PWR CRYSTAL-BASED ASK TRANSMITTER 8PIN SOT-23 - Rail/Tube |
| MAX1472AKA+T | 功能描述:射频发射器 300-450MHz Low-P Crystal-Based ASK RoHS:否 制造商:Micrel 类型:ASK Transmitter 封装 / 箱体:SOT-23-6 工作频率:300 MHz to 450 MHz 封装:Reel |
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