- New digital temperature sensors deliver higher precision, while offering cost-effective alternatives to thermistors and resistance temperature detectors.
High-precision, low-drift ADT7420 and ADT7320 digital temperature sensors.

Norwood, MA (06/07/2010) - Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal-processing applications, today introduced two fully calibrated, 16-bit-resolution, high-linearity digital temperature sensors that achieve the industry’s highest level of precision over a wide operating temperature range. The high-precision, low-drift ADT7420 and ADT7320 digital temperature sensors achieve industry best ±0.25˚C accuracy over a –20˚C to +105˚C temperature range. In addition the new sensors offer industry leading ±0.5ºC accuracy over the –40°C to +125°C temperature range. The higher accuracy eliminates the need to average results, ensuring faster data measurement, higher-precision control loops, and improved energy efficiency and reliability in industrial, instrumentation, and medical applications. The new digital temperature sensors also provide highly accurate system reference temperature measurement to reduce errors in software-based, thermocouple cold-junction compensation applications and infrared imaging systems. For more on specific features, watch the video.

Unlike alternative solutions the ADT7420 and ADT7320 digital temperature sensors are plug-in ready and require no additional signal conditioning or calibration. The offerings are available with I²C (ADT7420) or SPI (ADT7320) digital interfaces, which allow system designers to easily integrate the devices into data acquisition, optical communications, environmental control systems, medical equipment, or food and pharmaceutical temperature monitors.

About the 16-Bit Digital Temperature Sensors
ADI’s new digital temperature sensors are guaranteed to operate over supply voltages from 2.7 V to 5.5 V with an operating temperature range of –40°C to +150˚C. Operating at 3.3 V, the supply current is 210 μA (typical). The sensors include a low-power one-sample-per-second mode that draws only 46 μA (typical) at 3.3 V and also offer a shutdown mode that reduces supply current to just 2 μA. Additional programmable options include over/under-temperature and critical-temperature indicators.

Availability, Pricing and Complementary Parts
The ADT7420 and ADT7320 digital temperature sensors are sampling now and complement other Analog Devices components, including the ADuC7061 low-power, precision analog microcontroller.

Product Sampling Accuracy/Interface Price Each
Per 1,000
ADT7320 NOW ±0.25°C SPI $2.35 16-lead LFCSP
(lead frame chip scale package)
ADT7420 NOW ±0.25°C I²C $2.35 16-lead LFCSP

For more information, please visit: or Or download the ADT7320 data sheet, ADT7420 data sheet.

About Analog Devices

Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 100,000 customers, representing virtually all types of electronic equipment. Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices is included in the S&P 500 Index.

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Editor's Contact Information:

Linda Kincaid

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