MAX30207 ±0.1°C Accurate, 1-Wire® Digital Temperature Sensor

Analog Devices' MAX30207 is a low-power, high-accuracy digital temperature sensor with ±0.1°C accuracy from +30°C to +50°C and ±0.3°C accuracy from -0°C to +70°C. It provides a 16-bit resolution (0.005°C).

The 2 mm x 2 mm x 0.75 mm package design has extremely low thermal mass. It 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.

Data is transferred serially through the 1-Wire protocol, which requires only one data line and a ground reference for communication. Power to the device is provided using the same data line used for communication using parasite power circuitry inside. Each MAX30207 has a unique 64-bit registration number factory-programmed into the chip. This 64-bit registration number acts as the node address in a multidrop 1-Wire network. In multidrop networks, optional GPIO pins may be used as address bits to identify each.

The MAX30207EVSYS# evaluation (EV) system provides a single platform to evaluate the MAX30207, a ±0.1°C accurate temperature sensor. The EV system consists of two boards connected through headers, a MAX32630FTHR microcontroller board and the MAX30207_INTERFACE_ EVKIT board. The EV system also includes a MAX30207_ SENSOR_FLEX_EVKIT flex module that holds the MAX30207 IC. The MAX32630FTHR contains the firmware necessary to use the PC GUI program and provides power to the MAX30207 interface board. The MAX30207 interface board ships with jumpers preinstalled to allow quick evaluation of the MAX30207.

Block Diagram

Features

• Accuracy of ±0.1°C allows the detection of temperature change such as fever spikes
• 1-Wire interface with options of A, B, and C variant allows a long string of temperature sensors to be connected
• Small 2 mm x 2 mm package size allows for development of small wearables