代理产线

Ultrasonic Signal Processor and Transducer Driver PGA460

 2017-07-12

【基本数据】

【产品特性】

•Fully Integrated Solution for Ultrasonic Sensing
•Complimentary Low-Side Drivers With Configurable Current Limit Supporting Both Transformer Based and Direct Drive Topology for Transducer Excitation
•Single Transducer for Both Burst/Listen or a Transducer Pair, One for Burst and Other for Listen Operation
•Low-Noise Receiver With Programmable 6-Point Time-Varying Gain (32 to 90 dB) With DSP (BPF, Demodulation) for Echo Envelope Detection
•Two Presets of 12-Point Time-Varying Threshold for Object Detection
•Timers to Measure Multiple Echo Distance and Duration
•Integrated Temperature Sensor
•Record Time for Object Detection up to 11 m

【产品应用】

Ultrasonic Radar
• Object distance and Position Sensing
• Presence and Proximity Detection
• Drone and Robotics Landing Assist and Obstacle Detection
Occupancy and Motion Sensors

【文字介绍】

The PGA460 device is a highly-integrated system on-chip ultrasonic transducer driver and signal conditioner with an advanced DSP core. The device has a complimentary low-side driver pair that can drive a transducer either in a transformer based topology using a step-up transformer or in a direct-drive topology using external high-side FETs. The device can receive and condition the reflected echo signal for reliable object detection. This feature is accomplished using an analog front-end (AFE) consisting of a low-noise amplifier followed by a programmable time-varying gain stage feeding into an ADC. The digitized signal is processed in the DSP core for both near-field and far-field object detection using time-varying thresholds.