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MAX6646 - +145C Precision SMBus-Compatible Remote/ Local Sensors

Description

The MAX6646/MAX6647/MAX6649 are precise, twochannel digital temperature sensors.

The devices accurately measure the temperature of their own die and a remote PN junction, and report the temperature in digital form using a 2-wire serial interface.

Features

  • o Dual Channel: Measures Remote and Local Temperature o 0.125°C Resolution o High Accuracy ±1°C (max) from +60°C to +145°C (Remote), and ±2°C (max) from +60°C to +100°C (Local) o Measures High-Ideality Thermal Diodes Up to +170°C (Apparent) +145°C (Real) o Two Alarm Outputs: ALERT and OVERT o Programmable Under/Overtemperature Alarm Temperature Thresholds o Programmable Conversion Rate o SMBus-Compatible Interface o SMBus Timeout MAX6646/MAX6647/MAX6649 Ordering Information PART TEMP RANGE PIN.

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Datasheet preview – MAX6646

Datasheet Details

Part number MAX6646
Manufacturer Maxim
File Size 168.12 KB
Description +145C Precision SMBus-Compatible Remote/ Local Sensors
Datasheet download datasheet MAX6646 Datasheet
Additional preview pages of the MAX6646 datasheet.

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Full PDF Text Transcription

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19-2540; Rev 1; 7/03 +145°C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms General Description The MAX6646/MAX6647/MAX6649 are precise, twochannel digital temperature sensors. The devices accurately measure the temperature of their own die and a remote PN junction, and report the temperature in digital form using a 2-wire serial interface. The remote PN junction is typically the emitter-base junction of a commoncollector PNP on a CPU, FPGA, or ASIC. 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 MAX6646/MAX6647/MAX6649 include an SMBus timeout.
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