收藏本站
315MHz/433MHz ASK Superheterodyne
Receiver with AGC Lock
f XTAL = RF IF
injection is required due to the on-chip image-rejection
architecture. The IF output is driven by a source follow-
er biased to create a driving-point impedance of 330 Ω ;
this provides a good match to the off-chip 330 Ω ceram-
ic IF filter.
The IRSEL pin is a logic input that selects one of the
three possible image-rejection frequencies. When V IRSEL
= 0V, the image rejection is tuned to 315MHz. V IRSEL =
V DD5 /2 tunes the image rejection to 375MHz, and V IRSEL
= V DD5 tunes the image rejection to 433MHz. The IRSEL
pin is internally set to V DD5 /2 (image rejection at
375MHz) when it is left unconnected, thereby eliminating
the need for an external V DD5 /2 voltage.
Phase-Locked Loop
The PLL block contains a phase detector, charge
pump, integrated loop filter, VCO, asynchronous 64x
clock divider, and crystal oscillator driver. Besides the
crystal, this PLL does not require any external compo-
nents. The VCO generates a low-side LO. The relation-
ship between the RF, IF, and crystal frequencies is
given by:
f - f
32 × M
where:
M = 1 (V XTALSEL = V DD5 ) or 2 (V XTALSEL = 0V)
To allow the smallest possible IF bandwidth (for best sen-
sitivity), minimize the tolerance of the reference crystal.
Table 1. Component Values for Typical Application Circuit
COMPONENT
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
L1
L2
L3
R1
R2
R3
X1 ( ÷ 64)
X1 ( ÷ 32)
Y1
VALUE FOR f RF = 433MHz
100pF
2pF
100pF
100pF
1500pF
220pF
470pF
0.47μF
220pF
0.01μF
0.1μF
15pF
15pF
0.01μF
0.01μF
56nH
15nH
15nH
5.1k Ω
Open
Short
6.6128MHz**
13.2256MHz**
10.7MHz ceramic filter
VALUE FOR f RF = 315MHz
100pF
4pF
100pF
100pF
1500pF
220pF
470pF
0.47μF
220pF
0.01μF
0.1μF
15pF
15pF
0.01μF
0.01μF
120nH
15nH
27nH
5.1k Ω
Open
Short
4.7547MHz**
9.5094MHz**
10.7MHz ceramic filter
DESCRIPTION
5%
± 0.1pF
5%
5%
10%
5%
5%
20%
10%
20%
20%
Depends on XTAL
Depends on XTAL
20%
20%
5% or better*
5% or better*
5% or better*
5%
—
—
Crystek or Hong Kong Crystal
Crystek or Hong Kong Crystal
Murata
*Wire wound recommended.
**Crystal frequencies shown are for ÷64 (V XTALSEL = 0V) and ÷32 (V XTALSEL = V DD )
______________________________________________________________________________________
11
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)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*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
MAX7033EVKIT-315 EVAL KIT FOR MAX7033 315MHZ
MAX7034EVKIT-433+ EVAL KIT MAX7034
MAX7036EVKIT-433+ EVAL KIT MAX7036
MAX7042EVKIT-433+ EVAL KIT MAX7042
MAX7044EVKIT-433 EVAL KIT MAX7044
MAX7058EVKIT+ EVAL KIT MAX7058
MAX7060EVKIT+ EVAL KIT MAX7060
MAX8506EVKIT EVAL KIT FOR MAX8506
相关代理商/技术参数
MAX7033EUI 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
MAX7033EUI+ 功能描述:射频接收器 315MHz/433MHz ASK Superheterodyne Rec 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
MAX7033EUI+T 功能描述:射频接收器 315MHz/433MHz ASK Superheterodyne Rec 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
MAX7033EUI-T 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
MAX7033EVKIT-315 功能描述:射频开发工具 MAX7033 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
MAX7033EVKIT-433 功能描述:射频开发工具 MAX7033 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
MAX7034 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:315MHz/434MHz ASK Superheterodyne Receiver
MAX7034_09 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:315MHz/434MHz ASK Superheterodyne Receiver