TDC7200 Converter Datasheet

TDC7200 Datasheet PDF, Equivalent


Part Number

TDC7200

Description

Time-to-Digital Converter

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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TDC7200
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TDC7200
SNAS647D – FEBRUARY 2015 – REVISED MARCH 2016
TDC7200 Time-to-Digital Converter for Time-of-Flight Applications in LIDAR,
Magnetostrictive and Flow Meters
1 Features
1 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
2 Applications
• Flow Meter: Water Meter, Gas Meter, Heat Meter
• Magnetostrictive Position/Level Sensing
• Time-of-Flight in Drones (LIDAR, SONAR),
metering equipment and projectors
• Heat Cost Allocators
3 Description
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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TDC7200
TSSOP (14)
5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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.

TDC7200
TDC7200
SNAS647D – FEBRUARY 2015 – REVISED MARCH 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Companion Device................................................. 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5
7.2 ESD Ratings ............................................................ 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information .................................................. 6
7.5 Electrical Characteristics........................................... 7
7.6 Timing Requirements ................................................ 7
7.7 Switching Characteristics .......................................... 7
7.8 Typical Characteristics .............................................. 9
8 Detailed Description ............................................ 12
8.1 Overview ................................................................. 12
8.2 Functional Block Diagram ....................................... 12
8.3 Feature Description................................................. 12
8.4 Device Functional Modes........................................ 14
8.5 Programming........................................................... 21
8.6 Register Maps ......................................................... 24
9 Application and Implementation ........................ 35
9.1 Application Information............................................ 35
9.2 Typical Application ................................................. 35
9.3 Post Filtering Recommendations ............................ 39
9.4 CLOCK Recommendations..................................... 39
10 Power Supply Recommendations ..................... 41
11 Layout................................................................... 41
11.1 Layout Guidelines ................................................. 41
11.2 Layout Example .................................................... 42
12 Device and Documentation Support ................. 43
12.1 Documentation Support ....................................... 43
12.2 Community Resources.......................................... 43
12.3 Trademarks ........................................................... 43
12.4 Electrostatic Discharge Caution ............................ 43
12.5 Glossary ................................................................ 43
13 Mechanical, Packaging, and Orderable
Information ........................................................... 43
4 Revision History
Changes from Revision C (August 2015) to Revision D
Page
• Added EN = HIGH ................................................................................................................................................................. 7
• update equation ................................................................................................................................................................... 14
• Changed 3818 TO 318 ........................................................................................................................................................ 18
Changes from Revision B (June 2015) to Revision C
Page
• Changed the data sheet title From: TDC7200 Time-to-Digital Converter for Water and Gas Flow Sensing,
Magnetostrictive Position Sensing, and LIDAR Metering Applications To: TDC7200 Time-to-Digital Converter for
Time-of-Flight applications in LIDAR, Magnetostrictive and Flow Meters ............................................................................. 1
Changes from Revision A (March 2015) to Revision B
Page
• Changed the data sheet title From: TDC7200 Time-to-Digital Converter for Water, Gas, Heat Flow Metering
Applications To: TDC7200 Time-to-Digital Converter for Water and Gas Flow Sensing, Magnetostrictive Position
Sensing, and LIDAR Metering Applications............................................................................................................................ 1
• Changed the Applications list to include: "Magnetostrictive Position Sensing", and "LIDAR Metering"................................. 1
Changes from Original (February 2015) to Revision A
Page
• Changed From: 1-page Product Preview To: Full data sheet ............................................................................................... 1
• Changed ESD Ratings table................................................................................................................................................... 5
2 Submit Documentation Feedback
Product Folder Links: TDC7200
Copyright © 2015–2016, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TDC7200 SNAS647D – FEBRUAR Y 2015 – REVISED MARCH 2016 TDC7200 T ime-to-Digital Converter for Time-of-Fl ight Applications in LIDAR, Magnetostri ctive and Flow Meters 1 Features •1 Resolution: 55 ps • Standard Deviatio n: 35 ps • Measurement Range: – Mod e 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 Aver aging Mode for Low Power Consumption Supply Voltage: 2 V to 3.6 V • Oper ating Temperature –40°C to 85°C • SPI Host Interface for Configuration a nd Register Access 2 Applications • F low Meter: Water Meter, Gas Meter, Heat Meter • Magnetostrictive Position/Le vel Sensing • Time-of-Flight in Drone s (LIDAR, SONAR), metering equipment an d projectors • Heat Cost Allocators 3 Description The TDC7200 is a Time-to-D igital Converter (TDC) for ultrasonic sensing measurements such as water flow meter, gas flow meter, a.
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