onsemi NCV75215DB001R2G

The NCV75215 ASSP is intended to operate with a piezoelectric ultrasonic transducer to provide time-of-flight measurement of an obstacle distance during vehicle parking. The high-sensitivity, low-noise operation allows detection from 0.25 m up to 4.5 m for a standard 75 mm pole. Actual minimum distance is determined by the length of reverberations. Under ideal conditions, with perfectly tuned and matched external circuitry, a minimum distance of 0.2 m is achievable. Actual detection range depends on a piezoelectric ultrasonic transducer and external analog parts. The device drives the ultrasonic transducer with a programmable frequency via a transformer. The received echo is amplified and converted to a digital signal, filtered, detected and the magnitude is compared to a time-dependent threshold which is stored in an internal RAM. Distance to the obstacle is determined by the time measured from a transmission burst to echo recognition. A bidirectional I/O Line is used to communicate with a master (ECU). The master issues I/O Line commands to the NCV75215 and data are reported back via the same line.

• Measurement Distance Range from 0.25 m to 4.5 m (depends on External Parts)
• Acoustic Noise Monitoring
• Transducer Resonant Period Measurement
• Diagnosis of Transducer Performance
• Junction Temperature Monitoring and Thermal Shutdown
• Transducer Center Frequency Range from 35 to 90 kHz
• Direct and Indirect Measurement Modes
• EEPROM Memory for Configuration Setting and User Data
• Rx Gain Adjustable in 0.5 dB Steps in the Range from 50 to 110 dB
• Time-dependent Threshold Values for the Sensitivity Control
• Dynamic (Time-dependent) Gain Control
• Tx Current Range Adjustable from 50 mA to 350 mA
• Programmable Ultrasonic Burst Length
• On-chip Bidirectional I/O Line
• Small TSSOP16 Package
• NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable
• These are Pb -free Devices

• Automotive Park Assist
• Ultrasonic Distance Measurements