Overview
Connected sensing is the foundation of the Internet of Things, and it combines two demanding requirements: accurate measurement of the physical world and long battery life in a small product. Texas Instruments supplies the building blocks of such products, from low-power microcontrollers to precision converters and clean power, and BeiLuo supplies them as an authorized Texas Instruments distributor with FAE support for connected design.
The Power Budget Comes First
A connected node spends most of its life asleep, wakes to sense and transmit, and returns to sleep. The battery life depends on the average current, which depends on how long the node stays awake and how much energy each wake-up costs. The design task is to minimize both: sleep deeply, wake quickly, and do the work in as few operations as possible. Measuring the current under the real duty cycle, rather than at idle, is the only way to know whether the battery target will be met.
The Low-Power MCU
The MSP430FR5994 provides the low-power modes that make the sleep-sense-wake pattern work, and its FRAM memory logs data without the write delay and endurance limits of flash. The low-energy accelerator speeds up filtering, so the node can process sensor data without waking a faster core. Together these features let a small, low-power part handle real sensing work.
The Sensing Front End
An accurate sensor reading begins with a good analog front end. A zero-drift amplifier conditions the sensor signal, and a 16-bit converter such as the ADS1115 digitizes it with a programmable gain amplifier and an internal reference, so the node can measure a small sensor output without an external front end in many designs. The accuracy of the reading depends on the reference and the layout as much as on the converter, so the analog supply and grounding deserve the same care as in an instrument.
Clean Power for the Radio
A radio is sensitive to supply noise, which degrades its performance and reduces range. Powering the radio from a low-noise regulator such as the TPS7A4700 keeps its supply clean, and separating the radio's supply from the digital switching noise of the rest of the node prevents interference. This is a small design decision with a large effect on range and reliability.
Designing the Node
A connected node lives or dies by its antenna and its power budget. Keep the RF layout clean, follow the module vendor's reference design, and validate the range in a representative environment rather than in open air. Keep the analog sensing path away from the radio, and confirm the coexistence of the sensing and radio functions. BeiLuo's FAE team supports low-power planning, sensing front-end design and integration during design-in.
Why BeiLuo
We hold mainstream MSP430, converter and power parts in regional stock, support prototype through production quantities, and ship with import, origin and RoHS documentation. Our engineers help with low-power design and sensing accuracy even at low volume.
Next Steps
Send your sensing functions, power budget and connectivity requirements and we will propose an MCU, converter and power set, confirm availability, and supply samples for validation.