Analogue temperature sensor ICs protect goods in transit and use
Two analogue temperature sensor ICs from Maxim Integrated provide measurements to protect goods and equipment in harsh environments. The MAX31889 is claimed to deliver the highest accuracy temperature monitoring of cold-chain assets and the MAX31825 reduces system complexity and negates the use of multiple temperature sensors for consumer and factory automation.
The MAX31889 digital temperature sensor is claimed to replace expensive resistance temperature detectors (RTDs) in precise temperature-sensitive applications. The MAX31825 digital temperature sensor enables up to 64 devices per bus, all parasitically powered by the 1-Wire bus, to reduce wiring complexity.
In pharmaceutical cold chains, medical monitors and industrial automation applications, accuracy, low power and design simplicity are essential objectives, explains Maxim. Variations as little as two degrees C can adversely impact the quality of products and processes. The MAX31889 measures a wide temperature range with an accuracy of ±0.25-degree C. According to Maxim, it measures cold-chain pharma product temperatures at a fraction of the cost of RTDs and at 35 per cent the power consumed by competitive solutions. The MAX31889 comes in a six-pin µDFN package.
The MAX31825 reduces design and wiring complexity by allowing up to 64 devices, all connected to the same parasitically powered 1-Wire bus, with the precision of ±1-degree C accuracy. Each device has a unique code which can be optionally programmed with a location address, simplifying system design. The 1-Wire versatility improves system robustness by delivering an eight-fold reduction in necessary wiring compared to competitive two- or three-wire solutions.
It also supports longer battery life and extends operational uptime with a low standby current of 2.5 microA, ideal for consumer devices and factory automation.
The MAX31825 is supplied in a six-bump WLP.