SNAS648B October   2014  – August 2015 TDC1000 , TDC1000-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  7. Parameter Measurement Information
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Transmitter Signal Path
      2. 8.3.2 Receiver Signal Path
      3. 8.3.3 Low Noise Amplifier (LNA)
      4. 8.3.4 Programmable Gain Amplifier (PGA)
      5. 8.3.5 Receiver Filters
      6. 8.3.6 Comparators for STOP Pulse Generation
        1. 8.3.6.1 Threshold Detector and DAC
        2. 8.3.6.2 Zero-cross Detect Comparator
        3. 8.3.6.3 Event Manager
      7. 8.3.7 Common-mode Buffer (VCOM)
      8. 8.3.8 Temperature Sensor
        1. 8.3.8.1 Temperature Measurement with Multiple RTDs
        2. 8.3.8.2 Temperature Measurement with a Single RTD
    4. 8.4 Device Functional Modes
      1. 8.4.1 Time-of-Flight Measurement Mode
        1. 8.4.1.1 Mode 0
        2. 8.4.1.2 Mode 1
        3. 8.4.1.3 Mode 2
      2. 8.4.2 State Machine
      3. 8.4.3 TRANSMIT Operation
        1. 8.4.3.1 Transmission Pulse Count
        2. 8.4.3.2 TX 180° Pulse Shift
        3. 8.4.3.3 Transmitter Damping
      4. 8.4.4 RECEIVE Operation
        1. 8.4.4.1 Single Echo Receive Mode
        2. 8.4.4.2 Multiple Echo Receive Mode
      5. 8.4.5 Timing
        1. 8.4.5.1 Timing Control and Frequency Scaling (CLKIN)
        2. 8.4.5.2 TX/RX Measurement Sequencing and Timing
      6. 8.4.6 Time-of-Flight (TOF) Control
        1. 8.4.6.1 Short TOF Measurement
        2. 8.4.6.2 Standard TOF Measurement
        3. 8.4.6.3 Standard TOF Measurement with Power Blanking
        4. 8.4.6.4 Common-mode Reference Settling Time
        5. 8.4.6.5 TOF Measurement Interval
      7. 8.4.7 Averaging and Channel Selection
      8. 8.4.8 Error Reporting
    5. 8.5 Programming
      1. 8.5.1 Serial Peripheral Interface (SPI)
        1. 8.5.1.1 Chip Select Bar (CSB)
        2. 8.5.1.2 Serial Clock (SCLK)
        3. 8.5.1.3 Serial Data Input (SDI)
        4. 8.5.1.4 Serial Data Output (SDO)
    6. 8.6 Register Maps
      1. 8.6.1 TDC1000 Registers
        1. 8.6.1.1  CONFIG_0 Register (address = 0h) [reset = 45h]
        2. 8.6.1.2  CONFIG_1 Register (address = 1h) [reset = 40h]
        3. 8.6.1.3  CONFIG_2 Register (address = 2h) [reset = 0h]
        4. 8.6.1.4  CONFIG_3 Register (address 3h) [reset = 3h]
        5. 8.6.1.5  CONFIG_4 Register (address = 4h) [reset = 1Fh]
        6. 8.6.1.6  TOF_1 Register (address = 5h) [reset = 0h]
        7. 8.6.1.7  TOF_0 Register (address = 6h) [reset = 0h]
        8. 8.6.1.8  ERROR_FLAGS Register (address = 7h) [reset = 0h]
        9. 8.6.1.9  TIMEOUT Register (address = 8h) [reset = 19h]
        10. 8.6.1.10 CLOCK_RATE Register (address = 9h) [reset = 0h]
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Level and Fluid Identification Measurements
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Level Measurements
          2. 9.2.1.2.2 Fluid Identification
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Water Flow Metering
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Regulations and Accuracy
          2. 9.2.2.2.2 Transit-Time in Ultrasonic Flow-Meters
          3. 9.2.2.2.3 ΔTOF Accuracy Requirement Calculation
          4. 9.2.2.2.4 Operation
        3. 9.2.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
    2. 12.2 Documentation Support
    3. 12.3 Related Links
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Automotive AEC-Q100 (TDC1000-Q1)
  • Measurement Range: Up to 8 ms
  • Operating Current: 1.8 µA (2 SPS)
  • Transmitter Channels TX1/TX2:
    • Supports Single or Dual-Transducer Application
    • Programmable Excitation: 31.25 kHz to 4 MHz, Up to 31 Pulses
  • Receiver Channels RX1/RX2:
    • STOP Cycle-to-Cycle Jitter: 50 psRMS
    • Low-Noise and Programmable Gain Amplifiers
    • Access to Signal Chain for External Filter Design
    • Programmable Threshold Comparator for Echo Qualification
    • Automatic Channel Swapping for Differential Time-of-Flight (TOF) Measurement
    • Programmable Low Power Mode for Long TOF Measurements
  • Temperature Measurement
    • Interface to Two PT1000/500 RTDs
    • RTD-to-RTD Matching Accuracy 0.02°CRMS
  • Operating Temperature Range: -40°C to 125°C

2 Applications

  • Measurements through tanks of varying materials:
    • Fluid Level
    • Fluid Identification / Concentration
  • Flow Metering: Water, Gas, Heat
  • Distance/Proximity Sensing

3 Description

The TDC1000 is a fully integrated analog front-end (AFE) for ultrasonic sensing measurements of level, fluid identification/concentration, flow, and proximity/ distance applications common in automotive, industrial, medical, and consumer markets. When paired with an MSP430/C2000 MCU, power, wireless, and source code, TI provides the complete ultrasonic sensing solution.

TI's Ultrasonic AFE offers programmability and flexibility to accommodate a wide-range of applications and end equipment. The TDC1000 can be configured for multiple transmit pulses and frequencies, gain, and signal thresholds for use with a wide-range of transducer frequencies (31.25kHz to 4MHz) and Q-factors. Similarly, the programmability of the receive path allows ultrasonic waves to be detected over a wider range of distances/tank sizes and through various mediums.

Selecting different modes of operation, the TDC1000 can be optimized for low power consumption,
making it ideal for battery powered flow meters,
level instrumentation, and distance/proximity measurements. The low noise amplifiers and comparators provide extremely low jitter, enabling picosecond resolution and accuracy for zero and low flow measurements.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TDC1000 TSSOP (28) PW 9.70 mm × 4.40 mm
TDC1000-Q1 TSSOP (28) PW 9.70 mm × 4.40 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.
TDC1000 TDC1000-Q1 fp_app_nas648.gif

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from A Revision (December 2014) to B Revision

  • Added PW package nomenclature throught documentGo
  • Changed programmed threshold in Figure 35, Multiple Echo Receive Mode (Zoom-in) Go
  • Added trigger to START time description Go
  • Changed notes on Figure 37, Short TOF Measurement Go
  • Changed note A on Figure 38, Standard TOF Measurement Go
  • Changed note A on Figure 39, Standard TOF Measurement with Blanking Enabled Go
  • Changed Equation 9, downstream TOFGo

Changes from * Revision (October 2014) to A Revision

  • Added Pin Configuration and Functions section, Specifications section, Parameter Measurement Information section, Detailed Description section, Application and Implementation section, Power Supply Recommendations section and Layout sectionGo
  • Changed Device and Documentation Support section Go