Product details

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TSSOP (PW) 14 32 mm² 5 x 6.4
  • Resolution: 55 ps
  • Standard Deviation: 35 ps
  • Measurement Range:
    • Mode 1: 12 ns to 500 ns
    • Mode 2: 250 ns to 8 ms
  • Low Power Consumption: 0.5 µA (2 SPS)
  • Supports up to 5 STOP Signals
  • Autonomous Multi-Cycle Averaging Mode for Low
    Power Consumption
  • Supply Voltage: 2 V to 3.6 V
  • Operating Temperature –40°C to 85°C
  • SPI Host Interface for Configuration and Register
    Access
  • Resolution: 55 ps
  • Standard Deviation: 35 ps
  • Measurement Range:
    • Mode 1: 12 ns to 500 ns
    • Mode 2: 250 ns to 8 ms
  • Low Power Consumption: 0.5 µA (2 SPS)
  • Supports up to 5 STOP Signals
  • Autonomous Multi-Cycle Averaging Mode for Low
    Power Consumption
  • Supply Voltage: 2 V to 3.6 V
  • Operating Temperature –40°C to 85°C
  • SPI Host Interface for Configuration and Register
    Access

The TDC7200 is a Time-to-Digital Converter (TDC) for ultrasonic sensing measurements such as water flow meter, gas flow meter, and heat flow meter. When paired with the TDC1000 (ultrasonic analog-front-end), the TDC7200 can be a part of a complete TI ultrasonic sensing solution that includes the MSP430, power, wireless, and source code.

The Time to Digital Converter (TDC) performs the function of a stopwatch and measures the elapsed time (time-of-flight or TOF) between a START pulse and up to five STOP pulses. The ability to measure from START to multiple STOPs gives users the flexibility to select which STOP pulse yields the best echo performance.

The device has an internal self-calibrated time base which compensates for drift over time and temperature. Self-calibration enables time-to-digital conversion accuracy in the order of picoseconds. This accuracy makes the TDC7200 ideal for flow meter applications, where zero and low flow measurements require high accuracy.

When placed in the Autonomous Multi-Cycle Averaging Mode, the TDC7200 can be optimized for low system power consumption, making it ideal for battery powered flow meters. In this mode, the host can go to sleep to save power, and it can wake up when interrupted by the TDC upon completion of the measurement sequence.

The TDC7200 is a Time-to-Digital Converter (TDC) for ultrasonic sensing measurements such as water flow meter, gas flow meter, and heat flow meter. When paired with the TDC1000 (ultrasonic analog-front-end), the TDC7200 can be a part of a complete TI ultrasonic sensing solution that includes the MSP430, power, wireless, and source code.

The Time to Digital Converter (TDC) performs the function of a stopwatch and measures the elapsed time (time-of-flight or TOF) between a START pulse and up to five STOP pulses. The ability to measure from START to multiple STOPs gives users the flexibility to select which STOP pulse yields the best echo performance.

The device has an internal self-calibrated time base which compensates for drift over time and temperature. Self-calibration enables time-to-digital conversion accuracy in the order of picoseconds. This accuracy makes the TDC7200 ideal for flow meter applications, where zero and low flow measurements require high accuracy.

When placed in the Autonomous Multi-Cycle Averaging Mode, the TDC7200 can be optimized for low system power consumption, making it ideal for battery powered flow meters. In this mode, the host can go to sleep to save power, and it can wake up when interrupted by the TDC upon completion of the measurement sequence.

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Technical documentation

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Type Title Date
* Data sheet TDC7200 Time-to-Digital Converter for Time-of-Flight Applications in LIDAR, Magnetostrictive and Flow Meters datasheet (Rev. D) 07 Mar 2016
Technical article How ultrasonic technology improves convenience and performance in home automation 05 Oct 2017
Technical article Power naps: saving energy using ultrasonic sensing 16 Aug 2016
Application note Interleaved Short Time Measurements Using TDC7200 30 Oct 2015
Technical article Time-of-flight measurements using high-performance time-to-digital converters 31 Jul 2015
Technical article Why are flow meter manufacturers switching from mechanical to ultrasonic? 11 Jun 2015
Application note Measuring an RTD Sensor with the TDC1000 and TDC7200 for Ultrasonic Sensing 09 Apr 2015
User guide TDC7200EVM User’s Guide 08 Jan 2015

Design & development

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Evaluation board

TDC7200EVM — TDC7200 Evaluation Module

The TDC7200EVM is an evaluation module that allows users to evaluate the operation and performance of the TDC7200 Time-to-Digital Converter. One example is calculating time of flight – whether it be for LIDAR or ultrasonic applications. The TDC7200EVM has two SMA connectors for the START and (...)

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Simulation model

TDC7200 IBIS Model

SNAM176.ZIP (37 KB) - IBIS Model
Reference designs

TIDA-00663 — LIDAR Pulsed Time of Flight Reference Design

Light Detection and Ranging (LIDAR) systems use the time taken by the light to fly back and forth to an object in an effort to measure the distance to this target.  The TIDA-00663 reference design shows how to design the time measurement back-end for LIDAR based on Time to Digital Converter (...)
Reference designs

TIDM-ULTRASONIC-FLOW-TDC — Ultrasonic Water Flow Meter Design using Time to Digital Conversion

The TIDM-ULTRASONIC-FLOW-TDC is a reference design for an ultrasonic flow meter (water, gas or heat meter) with LCD built using a Time-to-Digital converter and an ultra-low power MCU. Solution includes optimized leakage detection, low power consumption, and a small form factor that are (...)
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