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TIDM-ULTRASONIC-FLOW-TDC

Ultrasonic Water Flow Meter Design using Time to Digital Conversion

Design files

TIDM-ULTRASONIC-FLOW-TDC

Design files

Overview

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 important requirements for water, heat and gas meter applications. This design also includes a high efficiency DC-DC converter for system power.

Features
  • A small form factor, ultra-low power design
  • Ultrasonic Time of Flight measurement - No moving parts
  • Highly efficient DC-DC converter for system power
  • Super-cap design for power supply of RF module
  • Platform Design with sockets for RF, power module and MCU I/Os
  • PC GUI and firmware ready
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

download Design guide — TIDM-ULTRASONIC-FLOW-TDC
TIDU965A.PDF (5731 K)

Reference design overview and verified performance test data

download Schematic — TIDM-ULTRASONIC-FLOW-TDC
TIDREV1.PDF (1040 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDM-ULTRASONIC-FLOW-TDC
TIDREV2.PDF (86 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

download CAD/CAE symbol — TIDM-ULTRASONIC-FLOW-TDC
TIDREV4.ZIP (1126 K)

Files used for 3D models or 2D drawings of IC components

download Gerber file — TIDM-ULTRASONIC-FLOW-TDC
TIDCAB4.ZIP (553 K)

Design file that contains information on physical board layer of design PCB

download PCB layout — TIDM-ULTRASONIC-FLOW-TDC
TIDREV3.PDF (3144 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

TPS61291 — Low Iq Boost Converter with 15nA Bypass Operation

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

TPS62740 — 2.2V-5.5V input, ultra-low-power 300mA step-down buck DCDC converter with 360nA Iq

Data sheet: PDF | HTML
ESD protection diodes

TPD8E003 — 8 channel 9-pF, 5.5-V, ±12-kV ESD protection diode

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FR6989 — Rotary Sensing MCU with extended scan interface, 128KB FRAM, AES, LCD for flow meters

Data sheet: PDF | HTML
Ultrasonic sensor AFEs

TDC7200 — Time-to-digital converter for time-of-flight (ToF) applications for LIDAR and ultrasonic

Data sheet: PDF | HTML

Start development

Software

Technical documentation

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Type Title Date
* Design guide Ultrasonic Water Flow Measurement Using Time to Digital Conversion Design Guide (Rev. A) Jul. 20, 2015
Technical article Time-of-flight measurements using high-performance time-to-digital converters PDF | HTML Jul. 31, 2015
Technical article Why are flow meter manufacturers switching from mechanical to ultrasonic? PDF | HTML Jun. 11, 2015

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