TIDA-010050

Ultra-low power water flow measurement for AMR reference design

TIDA-010050

Design files

Overview

This fully tested reference design demonstrates a low-power solution for electronic measurement of water flow through a mechanical meter and provides a single-chip platform for flow measurement and wireless communications. The design is ideal for water meter automatic meter reading (AMR) modules that add wireless communications to existing mechanical meters. The RF subsystem supports standard protocols such as wireless M-Bus or proprietary protocols in the Sub-1 GHz ISM bands. This reference design offers the ability to accurately read the mechanical rotation from longer distances, and provides greater reliability. The ultra-low power consumption reduces the battery requirement and extends product lifetime.

Features
  • Single-chip integrated solution with flow meter metrology and RF communications subsystem
  • Meets measurement accuracy requirements of ISO4064-1:2014-11 (Class 1)
  • Consumes 1.83 µA while sampling at 16 Hz with 3.3-V power supply
  • Accurate measurement at up to 5.8 mm from rotating disc
  • Complete tested reference design with firmware, design files and test report

Design files & products

Design files

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

TIDUEO3.PDF (5164 K)

Reference design overview and verified performance test data

TIDRZI1.PDF (743 K)

Detailed schematic diagram for design layout and components

TIDRZI2.PDF (204 K)

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

TIDRZI3.PDF (114 K)

Detailed overview of design layout for component placement

TIDRZI5.ZIP (520 K)

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

TIDCFF1.ZIP (533 K)

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

TIDRZI4.PDF (496 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

NAND gates

SN74AUP2G002-ch, 2-input, 0.8-V to 3.6-V low power NAND gates

Data sheet document-pdfAcrobat PDF
P-channel MOSFETs

CSD23285F5-12-V, P channel NexFET™ power MOSFET, single LGA 0.8 mm x 1.5 mm, 35 mOhm, gate ESD protection

Data sheet document-pdfAcrobat PDF open-in-new HTML
Voltage translating gates

SN74AUP1T00Low Power, 1.8/2.5/3.3-V In, 3.3-V CMOS Out, Single 2-Input Positive-NAND Gate

Data sheet document-pdfAcrobat PDF

Start development

Software

Support software

TIDA-010050 Software — TIDCFF2.ZIP (2681 K)

Technical documentation

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Type Title Date
* Design guide Ultra-Low Power Water Flow Measurement for AMR Reference Design Apr. 12, 2019

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