ADT7320
±0.25°C Accurate, 16-Bit Digital SPI Temperature Sensor
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Overview
Features and Benefits
- Low power
Power saving 1 sample per second (SPS) mode
700 µW typical at 3.3 V in normal mode
7 µW typical at 3.3 V in shutdown mode - Easy Implementation
Low Power - SPI-compatible interface
- Wide operating ranges
Temperature range: −40°C to +150°C
Voltage range: 2.7 V to 5.5 V - Programmable interrupts
Critical overtemperature interrupt
Overtemperature/undertemperature interrupt - See datasheet for additional features
Product Details
The ADT7320 is a high accuracy digital temperature sensor that offers breakthrough performance over a wide industrial temperature range, housed in a 4 mm × 4 mm LFCSP package. It contains an internal band gap reference, a temperature sensor, and a 16-bit analog-to-digital converter (ADC) to monitor and digitize the temperature to a resolution of 0.0078°C. The ADC resolution, by default, is set to 13 bits (0.0625°C). The ADC resolution is a user programmable mode that can be changed through the serial interface.
The ADT7320 is guaranteed to operate over supply voltages from 2.7 V to 5.5 V. Operating at 3.3 V, the average supply current is typically 210 μA. The ADT7320 has a shutdown mode that powers down the device and offers a shutdown current of typically 2.0 μA at 3.3 V. The ADT7320 is rated for operation over the −40°C to +150°C temperature range.
The CT pin is an open-drain output that becomes active when the temperature exceeds a programmable critical temperature limit. The INT pin is also an open-drain output that becomes active when the temperature exceeds a programmable limit. The INT pin and CT pin can operate in either comparator or interrupt mode.
PRODUCT HIGHLIGHTS
- Ease of use, no calibration or correction required by the user.
- Low power consumption.
- Excellent long term stability and reliability.
- High accuracy for industrial, instrumentation, and medical applications.
- Packaged in a 16-lead RoHS-compliant, 4 mm x 4 mm LFCSP package.
APPLICATIONS
- RTD and thermistor replacement
- Thermocouple cold junction compensation
- Medical equipment
- Industrial controls and test
- Food transportation and storage
- Environmental monitoring and HVAC
- Laser diode temperature controls
Product Categories
Markets and Technologies
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- In Vitro Diagnostics
- Life Sciences & Medical Instrumentation
- Therapy Devices
- CT-Imaging
- Vital Signs Monitoring
- Electrocardiogram (ECG) Measurement
- Electroencephalogram (EEG) Measurement
- Non-Invasive Blood Pressure (NIBP)
- Respiration Rate Measurement
- Oxygen Saturation (SpO2) Measurement
- Body Composition, Hydration, Bioimpedance Analysis
- Insulin Pump
- Activity Tracking & Fall Detection
- Wearable Health Monitor
- Temperature Measurement
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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AN-892: Temperature Measurement Theory and Practical Techniques (Rev. 0)2/14/2015PDF733 kB
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UG-138: Evaluating the ADT7320/ADT7420 Temperature Sensors12/21/2012PDF927 kB
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ADT7320/ADT7420: Digital Temperature Sensors FAQ5/10/2011PDF657 kB
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CN-0172: High Accuracy Multichannel Thermocouple Measurement Solution3/22/2013PDF319 kB
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"Home" Is Where the Heart Is5/1/2013
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Two Ways to Measure Temperature Using Thermocouples Feature Simplicity, Accuracy, and Flexibility10/1/2010 Analog Dialogue
Software & Systems Requirements
Mbed Support
WIKI
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Tools & Simulations
IBIS Models
Reference Designs (2)
Design Resources
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PCN-PDN Information
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ADT7320 Discussions
Sample & Buy
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.