ZSC31050 Datasheet

© 2022 Renesas Electronics Corporation

21

January 14, 2022

2.6 Voltage Regulator

For 3V to 5V (±10%) ratiometric output applications, the external supply voltage can be used for sensor element biasing. If an absolute analog

output is required, then the internal voltage regulator with an external power regulation element (JFET) can be used. The regulation is bandgap-

can be varied between 3V and 5.5V in four steps with the voltage regulator as determined by a configuration word in EEPROM.

2.7 Watchdog and Error Detection

The ZSC31050 detects various possible errors. A detected error is signaled by changing to a diagnostic mode. In this case, the analog output

is set to the high or low level (maximum or minimum possible output value) depending on the error and the output registers of the digital serial

interface are set to a correlated error code.

A watchdog continuously monitors the operation of the CMC and the progress of the measurement loop.

A continuous check of the sensor bridge for broken wires is done by two comparators monitoring the input voltage of each input [(VSSA + 0.5V)

to (VDDA – 0.5V)]. The common mode voltage of the sensor is continuously monitored to detect sensor aging.

Different functions and blocks in the digital section are continuously monitored, including the RAM, ROM, EEPROM, and register contents.

See section 1.3.4 in the ZSC31050 Functional Description for a detailed description of all monitored blocks and methods of indicating errors.