Humidity & temp sensor node for Sub-1GHz star networks enabling 10+ year coin cell battery life

The TIDA-00484 TI Design uses Texas Instruments' nano-power system timer, boost converter, SimpleLink™ ultra-low power Sub-1 GHz wireless microcontroller (MCU) platform, and humidity sensing technologies to demonstrate an ultra-low power method to duty-cycle sensor end nodes leading to extremely long battery life. The TI Design includes techniques for system design, detailed test results, and information to get the design up and running quickly.  

Features 

• Use of Nano-Power System Timer to Duty-Cycle the System Results in 10+ Year Battery Life from CR2032 Coin Cell
• Configurable System Wakeup Interval
• Extremely Low Off-State Current (270 nA for 59.97 seconds)
• Ultra-Low On-State Current Due to Low Active Processor and Radio Transmit Currents (3.376 mA for 30 ms)
• ±3% Relative Humidity Accuracy
• ±0.2°C Temperature Accuracy

Parts Include:

CC1310  SimpleLink™ Sub-1 GHz Ultra-Low Power Wireless Microcontroller 
HDC1000  Low Power, 3% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor 
HDC1008  Low Power, 4% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor 
HDC1050  Low Power, 3% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor 
TPD1E10B06  Single Channel ESD in 0402 package with 10pF Capacitance and 6V Breakdown 
TPL5100  Nano Power Programmable Timer with Power Gating Functionality 
TPL5110  Ultra Low Power Timer with MOS driver and MOSFET Power ON 
TPL5111  Ultra Low Power System Timer (35 nA) for Power Gating in duty cycled applications 
TPS22860   Ultra-low leakage load switch
TPS61291  Low Iq Boost Converter with Bypass Operation 

Learn more by downloading the reference design below