塑料模具生产

塑料模具生产专业从事塑胶模具、五金模具及相关配套设备的设计与制造。现在有工模部,注塑部,丝印部,装配部。从模具制造到注塑生产提供一系列完善配套服务。
塑料模具生产我们拥有全套的加工中心、铣床、电火花等精密的加工设备,能根据图纸及样品,以合理的成本准则为客户设计制造出满意的精密模具,并根据客户需求及时跟进,严格控制产品质量、不断改进生产工艺,致力为客户创造最大的价值。
我们在模具定做后可以对塑料件、压铸件加工提供服务。注塑部现有各类注塑机十台,能充分满足各类模具的后期注塑成型需求。
塑料模具生产
我们始终把确保产品质量、提供优质服务、加强经营管理放在首位;秉承“信誉是无形的市场,满意的服务是永恒的市场”

PCB的历史

印制电路板的创造者是奥地利人保罗·爱斯勒(Paul Eisler),1936年,他首先在收音机里采用了印刷电路板。

1943年,美国人多将该技术运用于军用收音机,1948年,美国正式认可此发明可用于商业用途。自20世纪50年代中期起,印刷线路板才开始被广泛运用。

History of PCB

二极管系列

Diodes for SMD (PCBA)
我们为PCBA(SMD)项目购买二极管:
二极管系列
普通整流二极管
快恢复二极管
超快恢复二极管
高效整流二极管
稳压二极管
TVS二极管
小信号开关二极管
肖特基二极管
SOT、SOD系列开关管
小信号肖特基二极管
TO-277系列
双向触发二极管
整流桥
汽车整流器

电子元器件质量控制

电子元器件质量控制
我们为电子元器件的质量控制提供服务.
我们有一个电子元件质量控制实验室.
我们与深圳市的其他实验室合作。
TOWN EL GROUP 提供全方位的供应来自中国
电子产品工业、电子元器件及电子产品。

LMX2581 Wideband Frequency Synthesizer with Integrated VCO

LMX2581 Wideband Frequency Synthesizer with Integrated VCO
Industry’s Lowest Phase Noise Frequency Synthesizer

TI’s new LMX2581 wideband frequency synthesizer with integrated VCO outputs delivers the industry’s best phase noise performance. The LMX2581’s low noise PLL and industry’s highest phase detector frequency outperforms the competition to achieve the flexibility of a wideband frequency synthesizer without compromising system performance.

The highly-integrated LMX2581 combines a ?? fractional-N PLL, a multi-core VCO with tank circuit, optional frequency divider, two differential RF output buffers that can deliver +10 dBm single-ended on each side, and several low-noise, high-precision LDOs to enable lower cost systems in a number of applications, including wireless infrastructure, defense and aerospace, radar, test and measurement, and medical imaging.

Description

The LMX2581 is a low noise wideband frequency synthesizer that integrates a delta-sigma fractional N PLL, multiple core VCO, programmable output divider, and two differential output buffers. The VCO frequency range is from 1880 to 3760 MHz and can be sent directly to the output buffers or divided down by even values from 2 to 38. Each buffer is capable of output power from –3 to +12 dBm at 2700 MHz. Integrated low noise LDOs are used for superior noise immunity and consistent performance.

This synthesizer is a highly programmable device and it enables the user to optimize its performance. In fractional mode, the denominator and the modulator order are programmable and can be configured with dithering as well. The user also has the ability to directly specify a VCO core or entirely bypass the internal VCO. Finally, many convenient features are included such as power down, Fastlock, auto mute, and lock detection. All registers can be programmed through a simple 3 wire interface and a read back feature is also available.

The LMX2581 operates on a single 3.3 V supply and comes in a 32 pin 5.0 mm x 5.0 mm WQFN package.

Part Numbers
LMX2581
LMX2485E
LMX2531
LMX2541
LMX2571

Related end equipment

Cable Modem Termination System
Femto Base Station
Military: Radar/Electronic Warfare
Signal & Waveform Generator
TETRA Base Station
Vector Signal Analyzer
WiMAX & Wireless Infrastructure Equipment
Wireless Data Access Card
Wireless Infrastructure: Heterodyne RX/TX
Wireless Infrastructure: TD-SCDMA RX/TX
Wireless LAN Card
Digital Radio
Military: Munitions and Targeting
Point-to-Point Microwave Backhaul
Software Defined Radio (SDR)
Telecom Tower: Remote Radio Unit (RRU)
Vector Signal Generator
Wireless Communications Tester
Wireless Infrastructure: Direct Conversion RX/TX
Wireless Infrastructure: Hi-Perf WiMAX 802.16, 2.5-3.5GHz BTS RX/TX
Wireless Infrastructure: WCDMA & CDMA2000 4/8-Carrier, Receive Diversity RX/TX
Wireless Repeater

Source Texas Instruments

LMX2581 Wideband Frequency Synthesizer with Integrated VCO Datasheet and ordering information

ADM1270 – High Voltage Input Protection Device

ADM1270 - High Voltage Input Protection Device
ADM1270 – High Voltage Input Protection Device

Product Details

The ADM1270 is a current-limiting controller that provides inrush current limiting and overcurrent protection for modular or battery-powered systems. When circuit boards are inserted into a live backplane, discharged supply bypass capacitors draw large transient currents from the backplane power bus as they charge. These transient currents can cause permanent damage to connector pins, as well as dips on the backplane supply that can reset other boards in the system.

The ADM1270 is designed to control the inrush current, when powering on the system, via an external P-channel field effect transistor (FET).

To protect the system from a reverse polarity input supply, there is a provision made to control an additional external P-channel FET. This feature prevents reverse current flow in case of a reverse polarity connection, which can damage the load or the ADM1270.
The ADM1270 is available in a 3 mm 3 mm, 16-lead LFCSP and a 16-lead QSOP.

APPLICATIONS

Industrial modules
Battery powered/portable instrumentation

Source AD

ADM1270 – High Voltage Input Protection Device Datasheet and ordering information