HART调制解调器芯片

SD2057是一款专为实现HART协议而设计的CMOS单片调制解调器芯片，用于支持HART协议的现场仪表和控制器中。器件集成了所有必要的滤波、信号检测、调制、解调及HART信号波形整形等功能，所以芯片只需少量外围无源元件，即可满足HART物理层规范功能要求。\n\nSD2057使用相位连续的频移键控FSK技术，传输速率为1200位/秒，采用半双工通信，符合HART协议物理层要求。芯片调制模式的最大电源电流在5.5V电压及外部3.6864MHz时钟下为112µA。所需外围元件少，并采用4mm x 4mm的QFN封装，可极大节省电路板空间，因此非常适合主机和从机配置下的低功耗环路供电型应用。 • 符合HART通信协议物理层要求\n• 符合Bell202标准载波1200Hz和2200Hz\n• 内部集成接收滤波器，所需外部元件极少\n• HART波形整形输出具有额外驱动能力\n• UART接口\n• 工作电压2.7~5.5V\n• 低功耗,调制模式下最大功耗为112µA\n• -55~+125℃工作温度范围\n• 24引脚4mm x 4mm QFN封装\n• 满足RoHS环保要求;

SDIC

晶华微

Negative Charge Pump and Adjustable Regulator

GENERAL DESCRIPTION The SGM2057 is a negative output charge pump which has an inside adjustable regulator. The input voltage range is from 2.3V to 5.5V and the unregulated output equals to -VIN. For the regulated output of the SGM2057, it equals to -VCTL and the range is from 0V to -VIN. The

文件：1.08109 Mbytes 页数：12 Pages

SGMICRO

圣邦股份

SMA Female to SMB Plug Adapter

Features: • VSWR of 1.3:1 max up to 4 GHz • SMA interface meets MIL-STD-348A • SMB interface meets MIL-STD-348A • 30μ in. minimum contact plating • Gold Plated Beryllium Copper Contact

文件：525.68 Kbytes 页数：3 Pages

FAIRVIEW

AM/FM IFFM ST DET (FOR DIGITAL TUNING SYSTEM)

AM / FM IF + FM St DET (for digital tuning system) TA2057N is the AM / FM IF + FM St DET system IC, which is designed for DTS radios. This IC is included many functions and these can be used for digital tuning system with IF counter. Features Suitable for combination with digital t

文件：602.54 Kbytes 页数：18 Pages

TOSHIBA

东芝