PGA460-Q1: Accurate distance sensing between 10cm and 20cm from the transducer

Stephen,

Yes, the PGA460 can meet your short range requirement. For 10cm to 20cm detection, you have two options:

1. Use a high-frequency (180 to 480 kHz) mono-static transducer with a narrow field of view (5~15 degrees).
2. Use a low-frequency (30 to 80 kHz) bi-static transducer pair with a wide field of view (40 ~90 degrees).

Your field of view requirement will determine which you use. You can find a list of transducers you can filter by frequency and field of view here: PGA460 Transducer & Transformer Listing

Stephen,

To best understand how to implement an optimized system for short range sensing, see the PGA460 Ultrasonic Module Hardware and Software Optimization app note. This app notes discusses all the device variables, transducer parameters, and ambient conditions which impact ranging performance. I recommend you start your evaluation using the PGA460-Q1 EVM, and refer to the Ultrasonic Sensing with the PGA460-Q1 video series as a guide to help you optimize your settings.

For a bi-static reference design example, use either:

• PGA460 Bi-static Transducer Half-Bridge Driver Small Form Factor Design File

• PGA460 Bi-static Transducer Full-Bridge Driver Small Form Factor Design File

For a mono-static reference design example, use either:

• PGA460 Mono-static Transducer Full-Bridge Driver Small Form Factor Design File

• PGA460 Mono-static Transducer Half-Bridge Driver Small Form Factor Design File