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TDC7201 Datasheet

Time-to-Digital Converter

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TDC7201
SNAS686 – MAY 2016
TDC7201 Time-to-Digital Converter for Time-of-Flight Applications in LIDAR,
Range Finders, and ADAS
1 Features
1 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
2 Applications
• Range Finders
• LIDAR
• Drones and Robotics
• Advanced Driver Assistance Systems (ADAS)
• Collision Detection Systems
• Flow Meters
3 Description
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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TDC7201
nFBGA (25)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified LIDAR Application Block Diagram
Microcontroller
(MSP430)
Pulsed
Laser Diode
Transmission lens
2
CSBx
3
DI, DO, CLK
START1
STOP1
TDC7201
START2
STOP2
Detector
Photo
Diode
Receiving lens
Object
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




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TDC7201 Datasheet Preview

TDC7201 Datasheet

Time-to-Digital Converter

No Preview Available !

TDC7201
SNAS686 – MAY 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings ............................................................ 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 6
6.6 Timing Requirements ................................................ 6
6.7 Switching Characteristics .......................................... 7
6.8 Typical Characteristics .............................................. 8
7 Detailed Description ............................................ 11
7.1 Overview ................................................................. 11
7.2 Functional Block Diagram ....................................... 11
7.3 Feature Description................................................. 12
7.4 Device Functional Modes........................................ 13
7.5 Programming........................................................... 21
7.6 Register Maps ......................................................... 24
8 Application and Implementation ........................ 35
8.1 Application Information............................................ 35
8.2 Typical Application ................................................. 35
8.3 CLOCK Recommendations..................................... 38
9 Power Supply Recommendations...................... 40
10 Layout................................................................... 40
10.1 Layout Guidelines ................................................. 40
10.2 Layout Example .................................................... 41
11 Device and Documentation Support ................. 42
11.1 Documentation Support ....................................... 42
11.2 Community Resources.......................................... 42
11.3 Trademarks ........................................................... 42
11.4 Electrostatic Discharge Caution ............................ 42
11.5 Glossary ................................................................ 42
12 Mechanical, Packaging, and Orderable
Information ........................................................... 42
4 Revision History
DATE
May 2016
REVISION
*
NOTES
Initial release.
2 Submit Documentation Feedback
Product Folder Links: TDC7201
Copyright © 2016, Texas Instruments Incorporated


Part Number TDC7201
Description Time-to-Digital Converter
Maker etcTI
Total Page 30 Pages
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