SLDS250A December   2019  – May 2022 TUSS4440

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 Transformer 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 Transformer 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
          4. 8.2.1.2.4 Transformer Turns Ratio
          5. 8.2.1.2.5 Transformer Saturation Current and Main Voltage Rating
        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 Transformer Drive Configuration Options

The TUSS4440 supports two pulsing modes to accommodate specific system needs based on the transformer used as shown in Figure 8-2. The typical application diagram in Figure 8-1 is considered as "Case 1".

GUID-191303F9-58F3-49D2-86E8-5AE32027CE7F-low.gifFigure 8-2 TUSS4440 Transducer Drive Options

The behavior of the internal FETs of TUSS4440 is different for each configuration in Table 8-2. The relationship between the IOx pins and the state of the OUTA and OUTB pins for different register settings is shown in Table 8-2 and Table 8-3.

Table 8-2 OUTA / OUTB Pin Behavior for Different Drive Configurations in IO MODE 2
IO MODE 2
START OF BURSTHALF_BRG_MODEIO1IO2OUTAOUTBAPPLICATION CASE
YES000Hi-ZHi-ZCASE 1, CASE 3
001Hi-ZGND
010GNDHi-Z
NO011Hi-ZHi-Z
YES100Hi-ZHi-ZCASE 2, CASE 4
101GNDGND
110Hi-ZHi-Z
NO111Hi-ZHi-Z
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 BURSTHALF_BRG_MODECMD_TRIGGER
(IO MODE 0)		IO1
(IO MODE 1)		IO2OUTAOUTBAPPLICATION CASE
NO0010Hi-ZHi-ZCASE 1, CASE 3
0011
YES0100Hi-ZGND
0101GNDHi-Z
NO1010Hi-ZHi-ZCASE 2, CASE 4
1011
YES1100Hi-ZHi-Z
1101GNDGND