MAX1470EUI+T【PDF 9/12 页】IC RECEIVER 315MHZ 28-TSSOP

您好，
买卖IC网欢迎您。
请登录
免费注册

5页 6页 7页 8页 [9页]10页 11页 12页

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.

_______________________________________________________________________________________

9

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)

*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

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

MAX19700EVKIT EVAL KIT FOR MAX19700

MAX19985AETX+T IC MIXER DOWNCONV 36-TQFN-EP

MAX19993ETX+ IC MIXER DOWNCONV 36TQFN

相关代理商/技术参数

MAX1470EUI-T 制造商:Maxim Integrated Products 功能描述:315MHZ LOW-POWER, +3V SUPERHETERODYNE RECEIVE - Tape and Reel

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

MAX1471ATJ/V+ 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/V+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