XE1203SKC868XE2【PDF 35/38 页】KIT STARTER FOR XE1203 868MHZ

您好，
买卖IC网欢迎您。
请登录
免费注册

31页 32页 33页 34页 [35页]36页 37页 38页

XE1203F

The values recommended for applications using bit rates up to 38.4kbit/s are given in Table 25 below:

Name

CL1

CL2

RL1

Typical Value

for 434 MHz

22 nF

1.2 nF

560 Ω

Typical Value

for 868 MHz

22 nF

1.2 nF

470 Ω

Typical Value

for 915 MHz

22 nF

1.2 nF

470 Ω

Tolerance

± 5%

± 5%

± 5%

Table 25: Typical loop filter values for bit rates up to 38.4 kbit/s

The values recommended for applications using bit rates higher than 38.4 kbit/s are given in Table 26 below:

Name

CL1

CL2

RL1

Typical Value

for 434 MHz

3.3 nF

220 pF

1.2 k Ω

Typical Value

for 868 MHz

4.7nF

330 pF

1 k Ω

Typical Value

for 915 MHz

4.7 nF

330 pF

1 k Ω

Tolerance

± 5%

± 5%

± 5%

Table 26: Typical loop filter values for bit rates higher than 38.4 kbit/s

6.5 FREQUENCY SYNTHESIZER REFERENCE CRYSTAL

For narrow band applications, where the lowest frequency deviation and the narrowest baseband filter are

selected, the crystal for reference oscillator of the frequency synthesizer should have the following typical

characteristics:

Name

Fs

Description

Nominal frequency

Min. value

-

Typ. value

39.0 MHz

Max. value

-

(fundamental)

CL

Rm

Cm

C0

Δ fs(0)

Δ fs( Δ T)

Δ fs( Δ t)

Load capacitance for fs (on-chip)

Motional resistance

Motional capacitance

Shunt capacitance

Calibration tolerance at 25 °C

Stability over temperature range

(-40 °C to 85 °C)

Aging tolerance in first 5 years

-

-

-

-

-

-

-

8 pF (*)

-

-

-

-

-

-

-

40 Ω

30 fF

7 pF (*)

10 ppm

10 ppm

5 ppm

Table 27: Crystal characteristics

(*) The on-chip oscillator mode is user-defined by programming ADParam_Xsel parameter: the first for CL = 8 pF

and C0 = 7pF, and the second for CL = 8 pF and C0 = 3 pF; the latter will allow higher amplitude for the internal

signal with a slightly lower consumption.

The electrical specifications given in section 3.2.2 are valid for a crystal having the specifications given in Table 27 .

For wide band applications requiring less frequency stability, the values for Δ fs(0), Δ fs( Δ T), and/or Δ fs( Δ t) can be

relaxed. In this case foffset + BWssb should be lower than BWfilter, where foffset is the offset (error) on the carrier

frequency (the sum of Δ fs(0), Δ fs( Δ T), and/or Δ fs( Δ t)), BWssb is the single side-band bandwidth of the signal, and

BWfilter is the single side-band bandwidth of the base-band filter.

The overtone crystal usage may result in higher oscillator start-up time than fundamental mode. The overtone

crystal should be designed for Cload = 8 to 10 pF and has parameters of Rm < 60 Ω , C0 < 7 pF.

? Semtech 2008

35

www.semtech.com

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

XE1205SKC868XE1 KIT STARTER FOR XE1205 868MHZ

XE1283I076TRLF IC TXRX UHF LOW POWER 72-LFBGA

XE135B LAMP GAS T3.25 XENON 13.5V .375A

XE193 LAMP GAS T-3.25 XENON 14V .33A

XE2405 LAMP GAS FILLED BI-PIN 24V 5W

XE2410 LAMP GAS FILLED BI-PIN 24V 10W

XEB09-BIS MODEM ETHERNT BRDGE MPT OUTDOOR

XK-Z11-S ZIGBEE MODULE DEVELOPMENT KIT

相关代理商/技术参数

XE1203SKC915XE2 功能描述:KIT STARTER FOR XE1203 915MHZ RoHS:否类别:RF/IF 和 RFID >> RF 评估和开发套件，板系列:TrueRF™ 标准包装:1 系列:- 类型:GPS 接收器频率:1575MHz 适用于相关产品:- 已供物品:模块其它名称:SER3796

XE1205 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:180 MHz - 1GHz Low-Power, High Link Budget Integrated UHF Transceiver

XE1205I074TRLF 功能描述:IC TXRX 433/915MHZ 48-VQFN RoHS:是类别:RF/IF 和 RFID >> RF 收发器系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:30 系列:- 频率:4.9GHz ~ 5.9GHz 数据传输率 - 最大:54Mbps 调制或协议:* 应用:* 功率 - 输出:-3dBm 灵敏度:- 电源电压:2.7 V ~ 3.6 V 电流 - 接收:* 电流 - 传输:* 数据接口:PCB，表面贴装存储容量:- 天线连接器:PCB，表面贴装工作温度:-25°C ~ 85°C 封装/外壳:68-TQFN 裸露焊盘包装:管件

XE1205SKC433XE1 功能描述:KIT STARTER FOR XE1205 433MHZ RoHS:否类别:RF/IF 和 RFID >> RF 评估和开发套件，板系列:TrueRF™ 标准包装:1 系列:- 类型:GPS 接收器频率:1575MHz 适用于相关产品:- 已供物品:模块其它名称:SER3796

XE1205SKC868XE1 功能描述:KIT STARTER FOR XE1205 868MHZ RoHS:否类别:RF/IF 和 RFID >> RF 评估和开发套件，板系列:TrueRF™ 标准包装:1 系列:- 类型:GPS 接收器频率:1575MHz 适用于相关产品:- 已供物品:模块其它名称:SER3796

XE1205SKC915XE1 功能描述:KIT STARTER FOR XE1205 915MHZ RoHS:否类别:RF/IF 和 RFID >> RF 评估和开发套件，板系列:TrueRF™ 标准包装:1 系列:- 类型:GPS 接收器频率:1575MHz 适用于相关产品:- 已供物品:模块其它名称:SER3796

XE1209 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Ultra Low Power CMOS Transceiver

XE1209C012TRLF 制造商:Semtech Corporation 功能描述: