Product details

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NFBGA (ZAX) 25 16 mm² 4 x 4
  • Resolution: 55 ps
  • Standard Deviation: 35 ps
  • Measurement Range:
    • Individual Mode 1: 12 ns to 2000 ns
    • Individual Mode 2: 250 ns to 8 ms
    • Combined Operation: 0.25 ns to 8 ms
  • Low Active Power Consumption: 2.7 mA
  • Supports up to 10 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 Interface for Register Access
  • Resolution: 55 ps
  • Standard Deviation: 35 ps
  • Measurement Range:
    • Individual Mode 1: 12 ns to 2000 ns
    • Individual Mode 2: 250 ns to 8 ms
    • Combined Operation: 0.25 ns to 8 ms
  • Low Active Power Consumption: 2.7 mA
  • Supports up to 10 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 Interface for Register Access

The TDC7201 is designed for use with ultrasonic, laser and radar range finding equipment using time-of-flight technique. The TDC7201 has two built-in Time-to-Digital Converters (TDCs) that can be used to measure distance down to 4 cm and up to several kilometers using a simple architecture, which eliminates the need to use expensive FPGAs or processors.

Each 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 simultaneously and individually on two pairs of START and STOP pins using two built-in TDCs offers high flexibility in time measurement design.

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 TDC7201 ideal for range finder applications.

When placed in the Autonomous Multi-Cycle Averaging Mode, the TDC7201 device can be optimized for low system power consumption, which is ideal for battery-powered flow meters. In this mode, the host can go to sleep to save power and wake up when interrupted by the TDC upon completion of the measurement sequence.

The TDC7201 is designed for use with ultrasonic, laser and radar range finding equipment using time-of-flight technique. The TDC7201 has two built-in Time-to-Digital Converters (TDCs) that can be used to measure distance down to 4 cm and up to several kilometers using a simple architecture, which eliminates the need to use expensive FPGAs or processors.

Each 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 simultaneously and individually on two pairs of START and STOP pins using two built-in TDCs offers high flexibility in time measurement design.

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 TDC7201 ideal for range finder applications.

When placed in the Autonomous Multi-Cycle Averaging Mode, the TDC7201 device can be optimized for low system power consumption, which is ideal for battery-powered flow meters. In this mode, the host can go to sleep to save power and 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 TDC7201 Time-to-Digital Converter for Time-of-Flight Applications in LIDAR, Range Finders, and ADAS datasheet 19 May 2016
Application note Time of Flight and LIDAR - Optical Front End Design 04 Feb 2020
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 Short Time Measurement Using TDC7201 30 Jun 2016
User guide TDC7201-ZAX-EVM User’s Guide (Rev. A) 24 May 2016

Design & development

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Evaluation board

TDC7201-ZAX-EVM — TDC7201 Ultra Measurement Range Time-to-Digital Converter Evaluation Module

The TDC7201-ZAX-EVM is an evaluation module that allows users to test and evaluate the TDC7201 Time-to-Digital Converter. The TDC7201 can be used for accurate time measurements in LIDAR applications. The EVM is a BoosterPack plug-in module for the MSP430F5529 LaunchPad. The TDC7201-ZAX-EVM has two (...)
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Simulation model

TDC7201 IBIS Model

SNAM198.ZIP (37 KB) - IBIS Model
Reference designs

TIDA-060025 — Reference design maximizing transimpedance bandwidth for LIDAR and time-of-flight (ToF) applications

This design demonstrates a high-speed optical front-end with a Time of Flight (ToF) distance measurement circuit using a fiber-optic transmission medium, which can be adapted to any type of ToF measurement such as through free space. This design features an industry-leading 2.5-V output linear (...)
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