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Analog Output

There are three different outputs that are offered here, the analog output, the PW and SENT. For the analog output, the A17700 offers ratio-metric analog output to the supply of device. Programmable output clamps can be used for setting the operating range conditions as maximum and minimum detectable pressure signal. Diagnostic conditions will drive device output in high impedance, therefore, depending on the pull-up or pull-down on the output, the device output will be over or under the clamp voltage level if fault condition is detected. Broken wire output circuit will put the output in saturation voltage under or over clamps when broken supply or ground is detected. As shown here, the analog output low clamp 0.2 V (4% VCC) and output high clamp 4. 8 V (96% VCC) present limits of operating pressure range. Then an output higher than 96% VCC or lower than 4% VCC informs that an open/short event occurred or that a diagnostic flag was raised (assuming diagnostic enabled). Output between 4 and 10% VCC would reveal under-pressure (pressure < P1) fault, while output between 90 and 96% VCC would reveal over-pressure (pressure > P2) fault.

PTM Published on: 2021-04-07