ETSI Cat2 Receiver Capable wM-Bus 868 MHz RF Subsystem for Smart Utility Meter & Heat Cost Allocator
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This reference design describes an ETSI Cat. 2 receiver-capable RF subsystem for smart meters, fully compliant with the most popular wM-Bus S, T and C-modes at 868 MHz as per EN13757-4:2014. The SimpleLink RF transceiver device delivers market leading blocking, selectivity and RX sensitivity numbers in wM-Bus applications, such as bi-directional flow meters, e-meters and heat cost allocators. This cost-optimized design handles the worst case frequency offset of +-60ppm in S2-mode by utilizing an inexpensive XTAL component. Neither an external SAW filter nor costly TCXO component are needed to meet the specification of the wM-Bus modes @ 868 MHz. Additionally, this design uses a ultra-low Iq DC/DC converter with dynamically adjustable output voltage, enables a new level of optimization of the design's power consumption, significantly extending the battery lifetime.

  • Market leading blocking, selectivity and RX sensitivity subsystem for wM-Bus at 868MHz
  • Fully compliant with the wM-Bus requirements for S2, T2-Meter and C2-Meter modes
  • DC/DC converter with adjustable Vout and 360nA Iq current
  • No costly SAW filter and TCXO required
  • Two pin-compatible IPC options for Balun + Matching available
  • This circuit design is tested and includes test firmware, SRF7 Studio GUI configuration files and getting started guide

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Part Number Buy from Texas Instruments or Third Party Status

CC1200EMK-868-930 :
CC1200 Evaluation Module Kit 868-930 MHz



TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CC1200  Low power and high performance wireless transceiver  Wireless connectivity  Sample & Buy View Design Kits & Evaluation Modules
TPS62740  2.2V-5.5V input, ultra-low-power 300mA step-down buck DCDC converter with 360nA Iq  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CC1200 Download Download
TPS62740 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1882 17 Oct 2014
Design files (6)
Title Type Size (KB) Date
ZIP 109 29 Oct 2014
PDF 280 29 Oct 2014
PDF 98 29 Oct 2014
ZIP 77 29 Oct 2014
PDF 48 29 Oct 2014
ZIP 140 29 Oct 2014
Related Tools & Software

Software development (2)

Name Part Number Software Type
Wireless M-Bus Protocol Software  WMBUS  Application software & framework 

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