Triple Remote and Local Temperature Sensor with SMBus, I2C Interface and ACPI Compatible

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Product details

Parameters

Local sensor accuracy (Max) (+/- C) 3 Type Remote Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 3 Interface type I2C, SMBus, 2-Wire Supply voltage (Max) (V) 3.6 Supply current (Max) (uA) 800 Temp resolution (Max) (bits) 8 Features ALERT Remote channels (#) 3 Addresses 9 Rating Catalog open-in-new Find other Digital temperature sensors

Package | Pins | Size

SSOP (DBQ) 16 29 mm² 4.9 x 6 open-in-new Find other Digital temperature sensors

Features

  • Accurately senses die temperature of 3 remote ICs, or diode junctions
  • On-board local temperature sensing
  • SMBus and I2C compatible interface, supports SMBus 1.1 TIMEOUT
  • Two interrupt outputs: INT# and T_CRIT_A#
  • Register readback capability
  • 7 bit plus sign temperature data format, 1 °C resolution
  • 2 address select pins allow connection of 9 LM83s on a single bus

Key Specifications

[Solid_Square] Supply Voltage 3.0V to 3.6V
[Solid_Square] Supply Current 0.8mA (max)
[Solid_Square] Local Temp Accuracy (includes quantization error)
0°C to +85°C ±3.0°C (max)
[Solid_Square] Remote Diode Temp Accuracy (includes quantization error)
+25°C to +100°C ±3°C (max)
0°C to +125°C ±4°C (max)

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Description

The LM83 is a digital temperature sensor with a 2 wire serial interface that senses the voltage and thus the temperature of three remote diodes using a Delta-Sigma analog-to-digital converter with a digital over-temperature detector. The LM83 accurately senses its own temperature as well as the temperature of three external devices, such as Pentium II® Processors or diode connected 2N3904s. The temperature of any ASIC can be detected using the LM83 as long as a dedicated diode (semiconductor junction) is available on the die. Using the SMBus interface a host can access the LM83's registers at any time. Activation of a T_CRIT_A# output occurs when any temperature is greater than a programmable comparator limit, T_CRIT. Activation of an INT# output occurs when any temperature is greater than its corresponding programmable comparator HIGH limit.

The host can program as well as read back the state of the T_CRIT register and the four T_HIGH registers. Three state logic inputs allow two pins (ADD0, ADD1) to select up to 9 SMBus address locations for the LM83. The sensor powers up with default thresholds of 127°C for T_CRIT and all T_HIGHs. The LM83 is pin for pin and register compatible with the LM84 as well as the Maxim MAX1617 and the Analog Devices ADM1021.


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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet Triple-Diode Input & Local Digital Temp Sensor w/Two-Wire Interface datasheet (Rev. A) May 03, 2004
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Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
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Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Software development

DRIVER OR LIBRARY Download
Linux Driver for LM83
LM83SW-LINUX The Linux driver supports the LM83 series of System Hardware Monitors. The Linux driver supports communication through the I2C bus and interfaces with the Hardware Monitoring sub-system.
Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:
  • lm83
  • lm82
(...)

CAD/CAE symbols

Package Pins Download
SSOP (DBQ) 16 View options

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