MAX6642
±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
Industry's Smallest ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
Top
Overview
Features and Benefits
- Integrated Temperature Sensor Enables Simultaneous Dual Temperature (Remote and Local) Measurements
- Remote Accuracy ±1°C
- Local Accuracy ±2°C from +60°C to +100°C
- Measures Remote Temperature up to +150°C
- 0.25°C Resolution
- Dual Zone Monitoring Automates Over-Temperature Alarms
- Programmable Remote/Local Temperature Thresholds
- ALERT Output
- Small Footprint
- 3mm x 3mm TDFN Package with Exposed Pad
- Low Thermal Mass Reduces Measurement Latency
- SMBus/I2C Address Hardwired
Product Details
The MAX6642 precise, two-channel digital temperature sensor accurately measures the temperature of its own die and a remote PN junction and reports the temperature data over a 2-wire serial interface. The remote PN junction is typically a substrate PNP transistor on the die of a CPU, ASIC, GPU, or FPGA. The remote PN junction can also be a discrete diode-connected small-signal transistor.
The 2-wire serial interface accepts standard system management bus (SMBus™), Write Byte, Read Byte, Send Byte, and Receive Byte commands to read the temperature data and to program the alarm thresholds. To enhance system reliability, the MAX6642 includes an SMBus timeout. The temperature data format is 10 bits with the least significant bit (LSB) corresponding to +0.25°C. The active-low ALERT output asserts when the local or remote overtemperature thresholds are violated. A fault queue can be used to prevent the active-low ALERT output from setting until two consecutive faults have been detected.
Measurements can be done autonomously or in a single-shot mode.
Remote accuracy is ±1°C maximum error between +60°C and +100°C. The MAX6642 operates from -40°C to +125°C, and measures remote temperatures between 0°C and +150°C. The MAX6642 is available in a 6-pin TDFN package with an exposed pad.
Applications
- Desktop Computers
- Graphic Cards
- Notebook Computers
- Servers
- Test and Measurement Equipment
- Thin Clients
- Workstations
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
-
MAX6642 Reliability Data1/12/2023PDF59K
-
MAX5860/MAX5862 Thermal Model Considerations7/7/2015
-
Migrating to the MAX6642 from Other Thermal Diode Temperature Sensors11/4/2005
-
Selecting Temperature Sensors for System Measurement and Protection7/8/2004
-
Compensating for Ideality Factor and Series Resistance Differences between Thermal-Sense Diodes9/5/2002
-
Understanding Multidrop Address Assignments for Thermal Sensors3/28/2014
-
Overview of Sensor Signal Paths5/12/2010
-
Thermal Management Handbook5/4/2010
-
Extended-Range Temperature-Sensing ICs4/27/2004
Tools & Simulations
Software Development
Design Resources
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.
Support & Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.