Texas Instruments PGA460TPWRQ1 | Demoboard TIDA-01597

Description

This reference design provides hardware architecture for a Park Assist System (PAS) using three highly integrated, system-on-chip (SoC) ultrasonic transducer drivers. These ultrasonic transducer drivers have an integrated signal conditioner with an advanced digital signal processor (DSP) core. Using these integrated features, object detection from 25cm to 2.5m is achieved. The distance data is sent over a one-wire interface (OWI) to a local electronics control unit (ECU) where the data can be aggregated and processed. The sensor initialization, object detection algorithm, and software described in this design guide provide a basic framework to help engineers working on PAS for automotive or collision avoidance.

Features

Fully Integrated Solution for Ultrasonic SensingAEC-Q100 Qualified With the Following Results: Device Temperature Grade 2: –40°C to +105°C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4B

Complimentary Low-Side Drivers With Configurable Current Limit Supporting Both Transformer Based and Direct Drive Topology for Transducer ExcitationSingle Transducer for Both Burst/Listen or a Transducer Pair, One for Burst and the Other for Listen OperationLow-Noise Receiver With Programmable 6-Point Time-Varying Gain (32 to 90 dB) With DSP (BPF, Demodulation) for Echo Envelope DetectionTwo Presets of 12-Point Time-Varying Threshold for Object DetectionTimers to Measure Multiple Echo Distance and DurationIntegrated Temperature SensorRecord Time for Object Detection up to 11 m128 Bytes of RAM for Echo Recording42 Bytes of User EEPROM to Store Configuration for Fast InitializationOne-Wire High-Voltage Time-Command Interface or USART Asynchronous InterfaceCMOS Level USART InterfaceSensor Diagnostics (Decay Frequency and Time, Excitation Voltage), Supply, and Transceiver Diagnostics.

Typical applications

• Automotive Park Assist / Lane-Departure and Collision Warning / Automotive Motion Sensor for Intrusion Detection
• Ultrasonic Radar / Automotive and Industrial Door-Opening Sensing / Occupancy and Motion Sensors / Drone and Robotics Landing Assist and Obstacle

More information

• IC product information