SLDS251A
December 2019 – May 2022
TUSS4470
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Power-Up Characteristics
6.6
Transducer Drive
6.7
Receiver Characteristics
6.8
Echo Interrupt Comparator Characteristics
6.9
Digital I/O Characteristics
6.10
Switching Characteristics
6.11
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Excitation Power Supply (VDRV)
7.3.2
Burst Generation
7.3.2.1
Burst Generation Diagnostics
7.3.3
Direct Transducer Drive
7.3.4
Analog Front End
7.4
Device Functional Modes
7.5
Programming
7.6
Register Maps
7.6.1
REG_USER Registers
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Transducer Drive Configuration Options
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Transducer Driving Voltage
8.2.1.2.2
Transducer Driving Frequency
8.2.1.2.3
Transducer Pulse Count
8.2.1.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Receiving Notification of Documentation Updates
11.2
Support Resources
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RTJ|20
MPQF156F
Thermal pad, mechanical data (Package|Pins)
RTJ|20
QFND016S
Orderable Information
slds251a_oa
slds251a_pm
6.11
Typical Characteristics
Figure 6-1
Receive Signal Path Transfer Function for VDD = 3.3 V
Figure 6-3
Receive Signal Path Transfer Function Across Temperature
Figure 6-5
Receive Signal Path Transfer Function for Various Logamp Stages Disabled
Figure 6-7
Receive Signal Path Log Conformance Error With Last Stage Disabled
Figure 6-9
Receive Signal Path Bandpass Filter Transfer Function
Figure 6-11
Receive Signal Path Bandpass Filter Center Frequency Trim
Figure 6-13
Receive Signal Path Transfer Function for Various Slope Adjustments
Figure 6-2
Receive Signal Path Transfer Function for VDD = 5 V
Figure 6-4
Receive Signal Path Transfer Function Across LNA Gain
Figure 6-6
Receive Signal Path Log Conformance Error With All Stages Enabled
Figure 6-8
Receive Signal Path Log Conformance Error With First and Last Stage Disabled
Figure 6-10
Receive Signal Path Bandpass Filter frequency for Various Register Settings
Figure 6-12
Receive Signal Path Bandpass Filter Bandwidth for Various Center Frequency Settings
Figure 6-14
Receive Signal Path Transfer Function for Various Intercept Adjustments