ADT7420
±0.25°C Accurate, 16-Bit Digital I2C Temperature Sensor
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Overview
Features and Benefits
- High performance
- Temperature accuracy
- ±0.20°C from −10°C to +85°C at 3.0 V
- ±0.25°C from −20°C to +105°C from 2.7 V to 3.3 V
- 16-bit resolution: 0.0078°C
- Temperature accuracy
- Ultralow temperature drift: 0.0073°C
- NIST traceable or equivalent
- Fast first temperature conversion on power-up of 6 ms
- Easy implementation
- No temperature calibration/correction required by user
- No linearity correction required
- 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
- 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
- I2C-compatible interface
- 16-lead, 4 mm × 4 mm LFCSP RoHS-compliant package
Product Details
The ADT7420 is a high accuracy digital temperature sensor offering breakthrough performance over a wide industrial range, housed in a 4 mm × 4 mm LFCSP package. It contains an internal band gap reference, a temperature sensor, and a 16-bit ADC to monitor and digitize the temperature to 0.0078°C resolution. 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 ADT7420 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 ADT7420 has a shutdown mode that powers down the device and offers a shutdown current of typically 2.0 μA at 3.3 V. The ADT7420 is rated for operation over the −40°C to +150°C temperature range.
Pin A0 and Pin A1 are available for address selection, giving the ADT7420 four possible I2C addresses. 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 comparator and interrupt event modes.
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, 4 mm × 4 mm LFCSP RoHS-compliant package.
Applications
- RTD and thermistor replacement
- Thermocouple cold junction compensation
- Medical equipment
- Industrial control and test
- Food transportation and storage
- Environmental monitoring and HVAC
- Laser diode temperature control
Product Categories
Markets and Technologies
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- Point of Care (PoC) Diagnostics
- In Vitro Diagnostics
- Therapy Devices
- CT-Imaging
- Vital Signs Monitoring
- Electrocardiogram (ECG) 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
- Life Sciences & Medical Instrumentation
- 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 (4)
Documentation & Resources
Software & Systems Requirements
Mbed Support
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Linduino code repository on GitHub and instructions on how to use the code.
IBIS Model
Design Resources
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| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| ADT7420UCPZ-R2 | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm) | |
| ADT7420UCPZ-RL7 | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm) | |
| Wafer Fabrication Data |
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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.