onsemi NCV77320DB0R2G

NCV77320 is a single-chip inductive position sensor interface that combines with a PCB to form a system capable of accurately measuring angular or linear position. The inductive sensor operates on the principle of mutual inductance. The chip contains an excitation source that generates an alternating magnetic field through a primary coil on the PCB; this field couples with a rotor, which in turn induces voltages in secondary coils. The chip measures these voltages, whose magnitudes depend on the rotor position, thereby enabling position measurement. The NCV77320 provides three interfaces: a single-ended analog output, a SENT interface with fast and slow channels, and an SPI channel for direct microcontroller connection. The analog output is ratiometric to the supply voltage. The NCV77320 incorporates multiple fault detection circuits. When a fault is detected, a fault flag is set and made available for reading. If the analog output is used, the OUT pin is set to high impedance (HiZ), and its voltage will approach the fault band of GND or VCC depending on the pull-up or pull-down resistor installed. To meet automotive functional safety requirements, different topology types can be implemented — for example: two devices with independent power supplies and no electrical connection between ICs, where each IC drives its own excitation coil and measures its own set of receive coils; or two devices with separate power supplies but sharing a single excitation coil connected to both ICs.

• Integrated DSP position calculation with flexible 15-point linearization
• Diagnostic capability including fault tolerance for missing/incorrect wiring
• Configurable analog output or SENT output
• Built-in temperature sensor
• SPI watchdog functionality
• 5V supply voltage, tolerant of -15V to 30V, with strong robustness
• Flexible SPI operation with 3.3V or 5V microcontrollers
• Maximum rotational speed of 10800 RPM
• Operating temperature range: -40℃ to 150℃
• Developed in accordance with automotive safety standard ISO 26262
• Lead-free, halogen-free/BFR-free, RoHS compliant

• Angular position sensing up to 360°, such as pedal position, throttle position, chassis height, actuator position feedback, etc.
• Linear position sensing, such as lever position, linear actuators, liquid level sensors, etc.