High Accuracy Low Power Digital Temperature Sensor PCB

(This project is being managed here: Project Repository )

Introduction to MAX30207:

MAX30207 IC is a low-power and high-accuracy digital temperature sensor. Its accuracy to measure temperature is ±0.1°C. It has a low thermal mass (the ability to store and release heat) and can be mounted on a flex PCB with only two conducting traces, allowing for minimal thermal conduction to the system PCB and accurate temperature measurements.

Benefits of MAX30207:

There are some common reasons which make it better than other temperature sensors to use:

• The accuracy and precision is high and better than others
• The size is compact that’s why used in wearable applications
• Operating voltage is from 1.7V to 3.6V
• The operating current during measurement is 67μA
• Simple and Robust Digital Interface i.e. single Wire Interface that has only one port for communication to reduce the number of components and make it simple
• Cyclic Redundancy Check (CRC) to detect accidental changes and errors in happens in digital sensors or systems

MAX30207 is useful for different advanced applications like:

• Wearable Body Temperature Monitoring
• Thermometers in the Medical field
• Smart Sensors (IoT based)

Schematic Diagram:

I have designed this PCB in Altium Designer. I have created two files of schematic; one for flex PCB and the other for the MAX30207 interface. After designing, I have uploaded them on Inventhub for the users who want to implement my design they can view or download it easily.

PCB file:

After designing the schematic, I have converted both my schematic file to a single PCB file in which I have combined a flex PCB with the Interface PCB board of MAX30270. Then I have uploaded the design files online on Inventhub for the manufacturer and the users.

Design for Manufacturing (DFM):

For fabrication, I have created a release file of my project on Inventhub which contains the schematic, PCB and library files in a ZIP file folder. Instead of visiting the manufacturer, I can send him this file he can view or download it and can fabricate my PCB board without any error.

Project History:

To create a backup of my design files, I have uploaded different revisions of my design on Inventhub. This contains the addition or removal of components in design at different stages. If I want to get back the specific change I have made in my design, I can go to the revisions and can select that particular file and can download it to reuse it as my current design.

Bill of Material:

I have created a list of my components in BOM section on Inventhub which contains the component’s name, library, footprint, description, manufacturer and quantity. My component provider can get my BOM file in CSV file format and can deliver my component as per my design requirements. I can also calculate the total cost of my design by clicking on ‘supply chain’ button.

To get complete how-to and detailed information on the project design and implementation visit this link:

Complete Project link