描述
ΔΣADC非常适合于测量电池充电等应用中的微细变化,但由于实际应用当中的许多传感器都具有很大的阻抗,因此经常会极大限制ADC的使用,或者需要增设前端信号调理电路。即使是很小的输入采样电流也会在高阻抗传感器上引起误差。LTC2498通过采用EasyD
rive技术(一种独特的模拟前端架构)来平衡输入电流,从而能够解决这个问题。
EasyDrive架构简化了ΔΣADC的驱动要求。该解决方案基于一种纯无源差分输入电流抵消算法,这种算法实现了轨至轨输入,而没有因为使用片内缓冲放大器所导致的功率要求增加以及所导致的误差。EasyDrive技术使得LTC2498能够与高阻抗传感器、低通滤波器和输入旁路电容器直接相连,而不会使直流性能产生实质性的劣化。图2详细描绘了LTC2480单通道EasyDriveADC的一个实例。
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主营:世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse(美国西屋)系列产品》
⑤SIEMENS(西门子系列产品)》
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据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
结构的zui现代化的容错控制器。
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◆Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
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