E52404A52C

The E524.04 offers ultrasonic range detection with minimum component count and supports a SPI slave interface for applications with external micro controller. In transmit mode, the IC drives a center tapped transformer directly. Driver frequency, transmitted burst power and other parameters are user configurable and adjusted via the interface. The adjusted values are stored in an internal EEPROM. The device features settings for short and long distance measurement.In receive mode, the echo signal is first amplified with a programmable gain amplifier and converted by an internal analog-to-digital converter. The signal is subsequently digitally filtered and compared. Comparator thresholds are adjustable via registers for defined interval lengths within a measurement period. The resulting signal can be read out by the external µC. A “Receive Only” mode enables the reception of indirect echos.The IO interface manages the communication between a control unit (BCU) and the ultrasonic module. The interface is accessed with the pins TxD and RxD.

• Minimum Component Ultrasonic Park Assist Solution
• 1-wire transceiver with RxD/TxD pins for external µC
• SPI interface to external micro controller
• Voltage regulator output for external devices
• Single Transceiver Architecture
• Programmable to transducer frequencies 40kHz to 58kHz
• Supports “Receive Only” Mode
• High Sensitivity and Low Noise Down to 0.5µVRMS
• Driver Power and Signal Gain Programmable
• Digital Filtering and Signal Processing 14 Programmable Threshold / Time Settings for
• Echo Envelope Evaluation
• Embedded EEPROM to Store Settings
• Automotive Supply and I/O Protection
• AEC-Q100 Qualification