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LMX2486

更新时间： 2024-02-03 02:17:37
品牌 Logo 应用领域
德州仪器 - TI 通信射频个人通信
页数 文件大小 规格书
48页 1134K
描述
用于射频个人通信的 1GHz 至 4.5GHz Δ-Σ 低功耗双路 PLL

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LMX2486 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Obsolete包装说明：QCCN, LCC24,.16SQ,20
Reach Compliance Code：compliantECCN代码：5A991.G
HTS代码：8542.39.00.01风险等级：5.71
模拟集成电路 - 其他类型：PLL FREQUENCY SYNTHESIZERJESD-30 代码：S-PQCC-N24
JESD-609代码：e3湿度敏感等级：3
端子数量：24最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：QCCN封装等效代码：LCC24,.16SQ,20
封装形状：SQUARE封装形式：CHIP CARRIER
峰值回流温度（摄氏度）：260电源：3 V
认证状态：Not Qualified子类别：PLL or Frequency Synthesis Circuits
标称供电电压 (Vsup)：3 V表面贴装：YES
技术：CMOS温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

LMX2486 数据手册

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Sample &  
Buy  
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Community  
Product  
Folder  
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Software  
Technical  
Documents  
LMX2486  
SNAS324B –JANUARY 2006–REVISED JANUARY 2016  
LMX2486 1-GHz to 4.5-GHz High-Performance Delta-Sigma Low-Power Dual PLLatinum™  
Frequency Synthesizers With 3-GHz Integer PLL  
1
1 Features  
•
Quadruple Modulus Prescaler for Lower Divids  
3 Description  
The LMX2486 device is  
a
low-power, high  
–
–
RF PLL: 16/17/20/21 or 32/33/36/37  
IF PLL: 8/9 or 16/17  
performance delta-sigma fractional-N PLL with an  
auxiliary integer-N PLL. The device is fabricated  
using TI’s advanced process.  
•
Advanced Delta Sigma Fractional Compensation  
–
–
12-Bit or 22-Bit Selectable Fractional Modulus  
With delta-sigma architecture, fractional spurs at  
lower offset frequencies are pushed to higher  
frequencies outside the loop bandwidth. The ability to  
push close in spur and phase noise energy to higher  
frequencies is a direct function of the modulator  
order. Unlike analog compensation, the digital  
feedback technique used in the LMX2486 is highly  
resistant to changes in temperature and variations in  
wafer processing. The LMX2486 delta-sigma  
modulator is programmable up to fourth order, which  
allows the designer to select the optimum modulator  
order to fit the phase noise, spur, and lock time  
requirements of the system.  
Up to 4th Order Programmable Delta-Sigma  
Modulator  
•
Improved Lock Times and Programming  
–
Fastlock / Cycle Slip Reduction Which  
Requires Only a Single-Word Write  
–
Integrated Time-Out Counter  
•
•
Wide Operating Range  
LMX2486 RF PLL: 1.0 GHz to 4.5 GHz  
Useful Features  
–
–
–
–
–
–
Digital Lock Detect Output  
Hardware and Software Power-Down Control  
On-Chip Crystal Reference Frequency Doubler  
RF Phase Detector Frequency Up to 50 MHz  
2.5-V to 3.6-V Operation With ICC = 8.5 mA  
Serial data for programming the LMX2486 is  
transferred through a three-line, high-speed (20-MHz)  
MICROWIRE interface. The LMX2486 offers fine  
frequency resolution, low spurs, fast programming  
speed, and a single-word write to change the  
frequency. This makes it ideal for direct digital  
modulation applications, where the N-counter is  
directly modulated with information. The LMX2486 is  
available in a 24-lead 4.0 × 4.0 × 0.8 mm WQFN  
package.  
2 Applications  
•
•
•
•
Cellular Phones and Base Stations  
Direct Digital Modulation Applications  
Satellite and Cable TV Tuners  
WLAN Standards  
Device Information(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
LMX2486  
WQFN (24)  
4.00 mm × 4.00 mm  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
Functional Block Diagram  
ëddLC1  
ëddLC2  
LC b ꢂivider  
. /ounꢀer  
! /ounꢀer  
8ꢁ9  
or  
CinLC  
ꢄbꢅ{/  
ꢅ{/in  
thase  
/omp  
/harge  
tump  
16ꢁ17  
trescaler  
/touꢀLC  
LC  
[ꢂ  
LC w  
ꢂivider  
ꢅ{/ouꢀ  
ëddwC1  
Cꢀesꢀꢁ[ꢂ  
ꢃÜó  
Cꢀesꢀꢁ[ꢂ  
wC w  
ꢂivider  
1X / 2X  
ëddwC2  
ëddwC3  
ëddwC4  
ëddwC5  
CinwC  
wC [ꢂ  
wC b ꢂivider  
/ /ounꢀer  
16ꢁ17ꢁ20ꢁ21  
or  
32ꢁ33ꢁ36ꢁ37  
trescaler  
/harge  
tump  
/touꢀwC  
C[ouꢀwC  
. /ounꢀer  
FinRF*  
! /ounꢀer  
/ꢄ  
wC Casꢀlock  
/[Y  
ꢃL/wꢅíLwꢄ  
Lnꢀerface  
ꢂ!Ç!  
Dbꢂ  
Dbꢂ  
Dbꢂ  
SD  
Compensation  
[ꢄ  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
 
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