SLDS251A December   2019  – May 2022 TUSS4470

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Power-Up Characteristics
    6. 6.6  Transducer Drive
    7. 6.7  Receiver Characteristics
    8. 6.8  Echo Interrupt Comparator Characteristics
    9. 6.9  Digital I/O Characteristics
    10. 6.10 Switching Characteristics
    11. 6.11 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Excitation Power Supply (VDRV)
      2. 7.3.2 Burst Generation
        1. 7.3.2.1 Burst Generation Diagnostics
      3. 7.3.3 Direct Transducer Drive
      4. 7.3.4 Analog Front End
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
    6. 7.6 Register Maps
      1. 7.6.1 REG_USER Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Transducer Drive Configuration Options
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Transducer Driving Voltage
          2. 8.2.1.2.2 Transducer Driving Frequency
          3. 8.2.1.2.3 Transducer Pulse Count
        3. 8.2.1.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.2.1 Transducer Drive Configuration Options

For different transducer drive configurations, the TUSS4470 supports multiple configurations to accommodate specific system needs as shown in Figure 8-2. The typical application diagram in Figure 8-1 is considered as "Case 1".

GUID-6A8407AB-B1C8-4463-9B53-3CDF5A138849-low.gifFigure 8-2 TUSS4470 Transducer Drive Options

The behavior of the internal FETs in the TUSS4470 device is different for each configuration in Figure 8-2. Table 8-2 and Table 8-3 shows the relationship between the IOx pins and the state of the OUTA and OUTB pins for different register settings.

Table 8-2 OUTA / OUTB Pin Behavior for Different Drive Configurations in IO MODE 2
IO MODE 2
START OF BURSTPRE_DRIVER_MODEHALF_BRG_MODEIO1IO2OUTAOUTBAPPLICATION CASE
YES0000GNDGNDCASE 1
0001GNDVVDRV
0010VVDRVGND
NO0011Hi-ZGND
YES0100Hi-ZHi-ZCASE 2
0101VVDRVVVDRV
0110GNDGND
NO0111Hi-ZHi-Z
YES1000GNDGNDCASE 3
1001GNDVVDRV
1010VVDRVGND
NO1011GNDGND
YES1100GNDGNDCASE 4
1101VVDRVVVDRV
1110GNDGND
NO1111GNDGND
Table 8-3 OUTA / OUTB Pin Behavior for Different Drive Configurations in IO MODE 0, IO MODE 1 and IO MODE 3
IO MODE 0, IO MODE 1, IO MODE 3
START OF BURSTPRE_DRIVER_MODEHALF_BRG_MODECMD_TRIGGER
(IO MODE 0)		IO1
(IO MODE 1)		IO2OUTAOUTBAPPLICATION CASE
NO00010Hi-ZGNDCASE 1
00011
YES00100GNDVVDRV
00101VVDRVGND
NO01010Hi-ZHi-ZCASE 2
01011
YES01100GNDGND
01101VVDRVVVDRV
NO10010GNDGNDCASE 3
10011
YES10100GNDVVDRV
10101VVDRVGND
NO11010GNDGNDCASE 4
11011
YES11100GNDGND
11101VVDRVVVDRV