MAX6687AU40L+

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Temperature Sensors are devices that measure and monitor temperature in a variety of applications. A Temperature Sensor provides feedback to a temperature control system, allowing the environment or food to be monitored and regulated to a desired set point. There are a few varieties of temperature sensors, from simple mechanical devices and thermistors, to thermocouples and solid state components. One of the most popular instruments available in the temperature sensing market today is the MAX6687AU40L+ solid state temperature sensor.

The MAX6687AU40L+ belongs to the family of ultra-precision bandgap temperature sensors, which offer highly accurate temperature readings from -40°C to 125°C. Temperature accuracy and stability is assured by the 26-bit (±19.6 °C) resolution of the device, which allows accurate readings down to 0.015 °C increments. As well as enhanced accuracy, this temperature sensor also features a very low offset drift of under 1 m°C/year. To further reduce noise and improve accuracy, the VOS (offset voltage) and TSTR (temperature sensitivity) have both been trimmed in the manufacturing process. The MAX6687AU40L+ is tailored for ultra-precise temperature sensing, and delivers accurate readings in low power systems, with a typical supply current of 600 nA.

The sensing element of the MAX6687AU40L+ is an integrated circuit, consisting of a bandgap voltage reference, a temperature sensor, and an analog-to-digital converter (ADC). This device works by converting temperature readings into a digital code directly, enabling more accuracy than conventional analog temperature sensors. The bandgap voltage reference produces a small but constant voltage that is resistant to environmental noise, such as changes in temperature, pressure, or humidity. This reference voltage is compared to the voltage created by the temperature sensor and changed into a digital code representing the temperature reading.

The MAX6687AU40L+ is a great choice for applications, such as servers and PCs, where high accuracy and very low drift temperature sensing is required, as well as thermostat, machinery, and medical devices. The device includes a single-wire serial interface, providing fast temperature measurements, with an option to perform 1, 2, 4, or 8 temperature conversions per second. Maximum resolution is also achievable, as each conversion can take up to 20 ms. Temperature readings can be obtained from the device from either direct read-out or thermistor measurements. The MAX6687AU40L+ also offers several features that ensure reliable operation, such as a watchdog timer, low current consumption, adjustable hysteresis, temperature offset, and temperature overrange indication.

The MAX6687AU40L+ is an ultra-precision temperature sensor, designed for applications requiring high accuracy and low-power operation. Its bandgap sensing ensures ultra-high accuracy across a wide temperature range, and its various features help keep the device running reliably with minimal power consumption. The single wire serial interface provides fast temperature measurements, allowing users to fully take advantage of its ±19.6 °C resolution. With all these features considered, the MAX6687AU40L+ is an ideal choice for a large variety of temperature sensing applications.

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