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参数资料
| 型号： | MAX1470EUI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC RECEIVER 315MHZ 28-TSSOP |
| 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： | 315MHz |
| 灵敏度： | -115dBm |
| 调制或协议： | ASK |
| 应用： | ISM，车库门开启器，RKE |
| 电流 - 接收： | 5.5mA |
| 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 ~ 85°C |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 带卷 (TR) |
315MHz Low-Power, +3V Superheterodyne
Receiver
DATA
MAX1470
DATA
SLICER
DATA
FILTER
MAX1470
DATA
SLICER
FILTER
25
20
19
DSN
DSP
25
20
19
26
DATA OUT
C4
R1
DATA OUT
47nF
DSN
25k ?
DSP
250k ?
PDOUT
47nF
Figure 2. Generating Data Slicer Threshold
peak detector to dynamically follow peak changes of
the data filter output voltage. For faster receiver startup,
the circuit shown in Figure 3 can be used.
433.92MHz Band
The MAX1470 can be configured to receive ASK modu-
lated data with carrier frequency ranging from 250MHz
to 500MHz. Only a small number of components need
to be changed to retune the RF section to the desired
RF frequency.
Table 2 shows a list of changed components and their
values for a 433.92MHz RF; all other components
remain unchanged.
The integrated image rejection of the MAX1470 is
specifically designed to function with a 315MHz input
frequency by attenuating any signal at 293.6MHz. The
benefit of the on-chip image rejection is that an external
SAW filter is not needed, reducing cost and the inser-
tion loss associated with SAW filters. The image rejec-
tion cannot be retuned for different RF input
frequencies and therefore is degraded. The image
rejection at 433.92MHz is typically 39dB.
Table 2. Changed Component Values for
433.92MHz
Figure 3. Using PDOUT for Faster Startup
Layout Considerations
A properly designed PC board is an essential part
of any RF/microwave circuit. On high-frequency inputs
and outputs, use controlled-impedance lines and
keep them as short as possible to minimize losses and
radiation. At high frequencies, trace lengths that are
approximately 1/20 the wavelength or longer become
antennas. For example, a 2in trace at 315MHz can act
as an antenna.
Keeping the traces short also reduces parasitic induc-
tance. Generally, 1in of a PC board trace adds about
20nH of parasitic inductance. The parasitic inductance
can have a dramatic effect on the effective inductance.
For example, a 0.5in trace connecting a 100nH induc-
tor adds an extra 10nH of inductance or 10%.
To reduce the parasitic inductance, use wider traces
and a solid ground or power plane below the signal
traces. Using a solid ground plane can reduce the par-
asitic inductance from approximately 20nH/in to 7nH/in.
Also, use low-inductance connections to ground on all
GND pins, and place decoupling capacitors close to all
V DD connections.
Chip Information
TRANSISTOR COUNT: 1835
COMPONENT
C9
L1
L2
Y1
VALUE FOR 433MHz RF
1.0pF
15nH
56nH
6.6128MHz
PROCESS: CMOS
Note: These values are affected by PC board layout.
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相关PDF资料 |
PDF描述 |
|---|---|
| MAX1470EVKIT-315 | EVAL KIT FOR MAX1470 315MHZ |
| MAX1471EVKIT-315 | EVAL KIT FOR MAX1471 315MHZ |
| MAX1472EVKIT-433# | EVAL KIT MAX1472 |
| MAX1473EVKIT-433 | EVAL KIT MAX1473 |
| MAX1479EVKIT-315 | EVAL KIT FOR MAX1479 315MHZ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1470EVKIT-315 | 功能描述:射频开发工具 MAX1470 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 |
| MAX1470EVKIT-433 | 功能描述:射频开发工具 MAX1470 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 |
| MAX1471AGJ/VY+ | 功能描述:射频接收器 315MHz/434MHz Low-Power 3V/5V ASK/FSK Superheterodyne Receiver 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 |
| MAX1471AGJ/VY+T | 功能描述:射频接收器 315MHz/434MHz Low-Power 3V/5V ASK/FSK Superheterodyne Receiver 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 |
| MAX1471ATJ | 功能描述:射频接收器 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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