ADT7420
RECOMMENDED FOR NEW DESIGNS±0.25°C Accurate, 16-Bit Digital I2C Temperature Sensor
- Part Models
- 2
- 1ku List Price
- Starting From $3.82
Part Details
- 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
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
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Technical Articles 3
Frequently Asked Question 1
Video 4
3rd Party Solutions 1
Device Drivers 1
Analog Dialogue 2
Webcast 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADT7420UCPZ-R2 | 16-Lead LFCSP (4mm x 4mm) | ||
| ADT7420UCPZ-RL7 | 16-Lead LFCSP (4mm x 4mm) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jul 29, 2016 - 16_0026 Qualify TeamQuest Technology, Inc. for Burn-in and Life Test of Military and Aerospace Devices |
||
| ADT7420UCPZ-R2 | PRODUCTION | |
|
May 11, 2014 - 13_0231 Assembly Transfer of Select 4x4 and 5x5mm LFCSP Products to STATS ChipPAC China. |
||
| ADT7420UCPZ-R2 | PRODUCTION | |
| ADT7420UCPZ-RL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
FPGA/HDL 1
Mbed Support 3
Device Drivers 1
Evaluation Software 0
Can't find the software or driver you need?
Tools & Simulations
Linduino 3
IBIS Model 1
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
Evaluation Kits
±0.1°C, ±0.25°C & ±0.5°C Accurate Temperature Sensor Evaluation Platform
Resources
+/-0.25 degree Celsius Temperature Measurement PMOD Board
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