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TIDC-DSSS868WMBUS-DC

Battery-powered Data Collector for wM-Bus T-/C-mode & DSSS-coded Data Packets @ 868.95MHz Ref Design

Design files

TIDC-DSSS868WMBUS-DC

Design files

Overview

TIDC-DSSS868WMBUS-DC enables data collectors with optimized firmware for receiving wireless M-Bus (wM-Bus) packets in frequent transmission (T-) and compact (C-) modes at 868.95 MHz. For improved range, a customized direct sequence spread spectrum (DSSS)-coded packet reception is also supported. This reference design can be adapted for wM-Bus and DSSS-enabled data collectors and mobile readers at 169-MHz and 433-MHz bands.

Features
  • Battery-powered data collector (or Mobile reader) for wM-Bus T- and C-mode or DSSS-coded data packets
  • 10 Vin ultra-low Iq DC/DC supports multiple battery types, configurations and chemistries.
  • Market leading blocking, selectivity and RX sensitivity in wM-Bus T-mode with +-12% data rate variation with 100 kcps @ 868.95 MHz for a robust wireless design
  • EN13757-4 T- and C-mode compliant "other" device with open source code examples for receive operation
  • 11-bits (and 16-bits) DSSS-coding of data supported in hardware
  • This ultra low-power, battery-operated data collector system is tested and includes open source licensed firmware. It also includes SRF7 studio GUI configuration files and user's guide and our sub-1 GHz transceiver, MSP430 microcontroller and ultra-low Iq step--down converter.
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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 — TIDC-DSSS868WMBUS-DC
TIDUA08A.PDF (2992 K)

Reference design overview and verified performance test data

download Schematic — TIDC-DSSS868WMBUS-DC
TIDRFO8.PDF (46 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDC-DSSS868WMBUS-DC
TIDRFO9.PDF (52 K)

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

download Assembly drawing — TIDC-DSSS868WMBUS-DC
TIDRFP0.ZIP (39 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDC-DSSS868WMBUS-DC
TIDRFP2.ZIP (343 K)

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

download Gerber file — TIDC-DSSS868WMBUS-DC
TIDCAK9.ZIP (103 K)

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

download PCB layout — TIDC-DSSS868WMBUS-DC
TIDRFP1.PDF (237 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)

TPS62745 — 3.3V-10V input, 300mA Ultra Low Iq step-down converter with VSEL and input voltage switch

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F5438A — 25-MHz MCU with 256-KB flash, 16-KB SRAM, 12-bit ADC, DMA, UART/SPI/I2C, timer, HW multiplier

Data sheet: PDF | HTML
Sub-1 GHz transceivers

CC1125 — Ultra-high performance Sub-1 GHz wireless transceiver for narrowband systems

Data sheet: PDF | HTML

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Software

Technical documentation

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Type Title Date
* Design guide Data Collector for wM-Bus T-/C-Modes and DSSS-Coded Long-Range Mode Design Guide (Rev. A) May 26, 2017

Related design resources

Software development

APPLICATION SOFTWARE & FRAMEWORK
WMBUS — Wireless M-bus protocol software

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