CC2651R3 Wireless Sensor Node — 0.8 µA Sleep

Overview

An ultra-low-power dual-protocol wireless sensor node running for years from a single AA cell — printed 2.4 GHz antenna, matched balun and a boost front end that runs down to 0.7V.

Challenge

Design a dual-protocol (Zigbee + BLE 5.0) wireless sensor node with 0.8µA sleep current from a single AA cell, printed PCB antenna, and matched RF chain.

Our Approach

• TI CC2651R3 SoC with Zigbee + BLE 5.0 dual protocol
• TPS610994 boost from 0.7V for single AA operation
• Johanson 2450BM15A0015E balun into printed PCB antenna
• 48MHz main + 32.768kHz sleep crystals
• Reed switch input for door/window/tamper sensing

Technical Highlights

• 0.8µA sleep current — years from single AA cell
• Dual Zigbee + BLE 5.0 at 2.4GHz, +5dBm output
• Printed PCB trace antenna — no external antenna cost
• 2-layer, single-side SMD for low-cost fabrication

Deliverables

• ✓Fabrication-ready PCB design
• ✓RF layout rules documentation
• ✓Power budget analysis
• ✓Assembly notes