DC2126A - DC2126A High-Accuracy Wireless Temperature Sensor with Solar Battery Life Extender
The DC2126A is a high-accuracy wireless temperature sensor, powered from ambient light, built using Linear Technology integrated circuits. A 24-bit delta-sigma ADC reads a thermistor biased from a precision voltage reference. A switching power supply harvests energy from the built-in solar panel, and automatically switches over to the internal battery when no ambient light is available.
At the core of the DC2126A is the LTP5901-IPM, SmartMesh IP wireless mote (node), which provides the ultra-low power wireless mesh connectivity with >99.999% data reliability and communicates the temperature to a central access point (manager). The LTP5901-IPM has on board an ARM Cortex-M3 processor, which can be loaded with user-developed application code using the SmartMesh IP On-Chip Software Development Kit (On-Chip SDK). In the DC2126A, custom application code controls the duty cycling of the voltage reference, samples readings from the ADC and sends the data packet through the SmartMesh IP network, as detailed in this LT Journal article.
A wireless temperature sensor is formed by conecting a wireless radio module to an ADC, reference and thermistor. The circuit is powered by an energy harvester that can take power from a battery or solar panel.
The DC2126A can be easily added to the DC9000B SmartMesh IP Starter Kit, or any SmartMesh IP network. Temperature readings are sent through the mesh network to a demonstration PC software GUI that displays temperature, and whether the DC2126A is running on solar power or on battery.
DC2126A Software Utilities
DC2126A Demo Manual - step by step instructions to operate the DC2126A
DC2126A Circuit Description (from LT Journal, July 2014) - describes theory of operation of the DC2126A circuit
SmartMesh IP Starter Kits - other SmartMesh IP demo boards
SmartMesh IP On-Chip Software Development Kit - Enables users to develop application code to run on a SmartMesh IP Mote
DC9000B - SmartMesh IP Starter Kit (chip antennae), 100 mote capacityDC9006A - Eterna Interface CardDC9010B - Eterna Serial ProgrammerDC9021A - SmartMesh IP RF Certified Starter Kit (chip antennae), 100 mote capacity
LT Journal
Product Info
Demo Board Design File
Demo Board Manual
Demo Board Schematic
Products
- DC2126A - Design Files
- LT6654 - Precision Wide Supply High Output Drive Low Noise Reference
- LTC2484 - 24-Bit ΔΣ ADC with Easy Drive Input Current Cancellation
- LTC3330 - Nanopower Buck-Boost DC/DC with Energy Harvesting Battery Life Extender
- LTC5800-IPM - SmartMesh IP Node 2.4GHz 802.15.4e Wireless Mote-on-Chip
- LTP5901-IPM - SmartMesh IP Mote Module with Chip Antenna
- LTP5902-IPM - SmartMesh IP Mote Module with Antenna Connector
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- SmartMesh IP Wireless Sensor Network Starter Kit
- SmartMesh IP On-Chip Software Development Kit (On-Chip SDK)
- Reliable Wireless Sensor Network Streamlines Manufacturing Operations
- Product How-to: Precise Wireless Temperature Sensor Powers Itself
- RF Shield for Eterna (LTC5800) designs
- Time Synchronization in a SmartMesh IP Network for Precise Timestamping and Control
- MicroGen’s Piezo-MEMS Vibration Energy Harvesters Enable Linear Technology SmartMesh IP Wireless Sensor Network
