TI中文支持网您好，我们计划将LDC1000用于一个自动切换量程的多路电感传感器系统，于是在查看SNOA924之后，有如下几个问题：
1.如果输入的LC回路的参数不在测量范围内（例如谐振频率低于5k或者高于5M，阻抗超出上下限等等）；此时LDC1000会输出什么样的数据？能否根据数据判断是那一项参数超出测量限制？
2.如果输入传感器出现故障，LDC1000会不会因此损坏？能否根据数据判断几种典型故障？
-LC回路电感开路，只有电容跨接在输入端口上；
-LC回路电容开路，只有电感跨接在输入端口上；
-LC回路电感短路，两输入端口短接；
-复用器损坏，两输入端口悬空；
user151383853：
从手册的表述看：
Measuring Parallel Resonance Impedance and Inductance with LDC1000The LDC1000 is an Inductance-to-Digital Converter that simultaneously measures the impedance and resonantfrequency of an LC resonator. It accomplishes this task by regulating the oscillation amplitude in a closed loopconfiguration to a constant level, while monitoring the energy dissipated by the resonator. By monitoring theamount of power injected into the resonator, the LDC1000 can determine the value of Rp; it returns this as adigital value which is inversely proportional to Rp. In addition, the LDC1000 can also measure the oscillationfrequency of the LC circuit; this frequency is used to determine the inductance of the LC circuit. The oscillationfrequency is returned as a digital value.The LDC1000 supports a wide range of LC combinations, with oscillation frequencies ranging from 5kHz to5MHz and Rp ranging from 798Ω to 3.93MΩ. This range of Rp can be viewed as the maximum input range of anADC. As illustrated in Figure 11, the range of Rp is typically a much smaller than maximum input rangesupported by the LDC1000. To get better resolution in the desired sensing range, the LDC1000 offersprogrammable input range through the Rp_MIN and Rp_MAX registers. Refer to Calculation of Rp Min and RpMax below for how to set these registers.When the sensor’s resonance impedance Rp drops below the programed Rp_MIN, the LDC’s Rp output will clipat its full scale output. This situation could for example happen when a target comes too close to the coil.
主要还是通过频率来测量电感或者距离的。各种问题通过频率来判断。如果传感器短路， 那么频率就为0了
