SLAA907D September   2019  – December 2021 PGA450-Q1 , PGA460 , PGA460-Q1 , TDC1000 , TDC1000-Q1 , TDC1011 , TDC1011-Q1 , TUSS4440 , TUSS4470

 

  1.   Trademarks
  2. 1What is Ultrasonic Time-of-Flight Sensing?
    1. 1.1 Principles of Ultrasound
    2. 1.2 Why Use Ultrasonic Sensing?
    3. 1.3 How Does Ultrasound Compare to Other Sensing Technologies?
    4. 1.4 Typical Ultrasonic-Sensing Applications
  3. 2Ultrasonic System Considerations
    1. 2.1 Introduction to the Ultrasonic System
    2. 2.2 The Ultrasonic Echo and Signal Processing
    3. 2.3 Transducer Types
    4. 2.4 Transducer Topologies
    5. 2.5 Transducer Frequencies
    6. 2.6 Transducer Drive (Transformer Drive & Direct Drive) and Current Limit
    7. 2.7 Pulse Count
    8. 2.8 Minimum Detection Range
  4. 3What Factors Influence Ultrasonic Sensing?
    1. 3.1 Transmission Medium
    2. 3.2 Acoustic Impedance
    3. 3.3 Radar Cross Section
    4. 3.4 Ambient Conditions (Temperature, Humidity, Debris)
    5. 3.5 Device Selection
  5. 4Additional Resources
  6. 5Revision History

3.5 Device Selection

It is important to choose an ultrasonic solution based on the system where it will reside. Table 3-2 shows TI's ultrasonic-sensing products:

Table 3-2 Device Selection
TDC1011 / TDC1000 TUSS4470 TUSS4440 PGA460
Device type Analog front-end Analog front-end Analog front-end Analog front-end + digital signal processor (integrated)
Supported transducer frequencies

31.25 kHz – 4 MHz

40 kHz – 1 MHz

40 – 440 kHz (pre-drive)

40 – 400 kHz

30 – 80 kHz & 180 – 480 kHz
Channel count

TDC1011: 1 Channel

TDC1000: 2 Channel

1 Channel

1 Channel

1 Channel
Drive topology

Direct drive (max 5V)

- Direct drive (max 36 V)

- Pre-drive

Transformer drive

- Transformer drive

- Direct drive with added FETs
Gain stage Fixed gain (20 to 41 dB) 86 dB logarithmic amplifier 86 dB logarithmic amplifier 6 point time-varying gain (32 to 90 dB)
Outputs

- Zero crossing

- Echo start and stop pulse

- Analog echo envelope

- Zero crossing

- Envelope threshold detect

- Analog echo envelope

- Zero crossing

- Envelope threshold detect

- DSP processed output (time-of-flight, amplitude, width)

- Echo data dump (down-sampled echo envelope)

- Raw digital data path (ADC, bandpass filter, rectifier, lowpass filter)
Temperature sensor Interface to RTD No No On-chip temperature sensor
Diagnostics

None

SPI diagnostics

SPI diagnostics

- System diagnostics (frequency, decay, excitation voltage)

- Supply diagnostics (overvoltage)
Automotive qualified device

TDC1011-Q1

TDC1000-Q1

N/A

N/A

PGA460-Q1
Output interface

SPI

- SPI for programming

- Analog output

- SPI for programming

- Analog output

- USART (UART + SPI)

- OWU

- TCI

For more information, visit ti.com/ultrasonic.