SLDA058
March 2021
TUSS4470
Trademarks
1
Review of Ultrasonic Sensing Range Performance Factors
1.1
Physical Parameters
1.2
Transducer Characteristics
1.3
AFE Device Configuration
2
Methods Overview
2.1
Introduction
2.2
Hardware Configuration
2.2.1
Transducers
2.2.2
Experimental Setup: Air-Coupled Level Sensing
2.2.3
Experimental Setup: Water-Coupled Level Sensing
2.2.4
TUSS4470 EVM Hardware Configuration
2.2.5
TDC1000-C2000EVM Hardware Configuration
2.3
Firmware Configuration
2.3.1
TUSS4470 Power Configuration
2.3.2
TUSS4470 220 kHz Configuration
2.3.3
TDC1000 220kHz Configuration
2.3.4
TDC1000 220kHz Configuration
2.3.5
TDC1000 1 MHz
3
Short Range Air-Coupled Test Results
3.1
TUSS4470
3.2
TDC1000
4
Mid-Range Air-Coupled Test Results
4.1
TUSS4470
4.1.1
Concept
4.1.2
TUSS4470 35 V Results
4.2
TDC1000
5
Short Range Water-Coupled Test Results
5.1
TUSS4470
5.2
TDC1000
6
Resistive Damping Device Comparison
6.1
TUSS4470
6.2
TDC1000
7
Summary
8
References
A Appendix A
A.1 TUSS4470: Filter Capacitor Selection
A.2 TUSS4470: Shematic
B Appendix B
B.1 TDC1000 Misc.
B.2 TDC1000-C2000EVM Schematic
2.2.4
TUSS4470 EVM Hardware Configuration
The following modifications were made from the default configuration:
Setting the CINN and CFLT capacitor banks to support the 220kHz and 1MHz transducers, respectively. For more information, see
Appendix A
or the
Recommended Component Values for Typical Applications
table in the
Typical Applications
section of the
TUSS4470 Direct Drive Ultrasonic Sensor IC With Logarithmic Amplifier Data Sheet
. Capacitors are selected with jumpers on
J1 and J4
.
The power mode jumpers located on
J6 and J8
were set depending on the drive voltage required for the test. For more information, see the
Power Mode Jumper Position
table in
TUSS44x0 EVM for Ultrasonic Sensors User's Guide
.
J3
was populated with a two pin female header for connecting the transducers in the half-bridge driver configuration.