LM95245

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±0.75°C remote & local temperature sensor with SMBus, beta compensation for 45nm d

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Product details

Parameters

Local sensor accuracy (Max) (+/- C) 2 Product type Remote Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 2.7 Interface type I2C, SMBus, 2-Wire Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 670 Temp resolution (Max) (bits) 11 Features One-shot conversion, ALERT Remote channels (#) 1 Addresses 3 Rating Catalog open-in-new Find other Digital temperature sensors

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Digital temperature sensors

Features

  • Remote and Local Temperature Channels
  • Targeted for Intel 45nm Processor Diodes
  • Two Formats: −128°C to +127.875°C and 0°C to 255.875°C
  • Digital Filter for Remote Channel
  • Programmable TCRIT and OS Thresholds
  • Programmable Shared Hysteresis Register
  • Diode Fault Detection
  • Mask, Offset, and Status Registers
  • SMBus 2.0 Compatible Interface, Supports TIMEOUT
  • Programmable Conversion Rate for Best Power Consumption
  • Three-Level Address Pin
  • Standby Mode One-Shot Conversion Control
  • Pin-for-Pin Compatible With the LM95235 and LM86, LM89, LM99
  • 8-Pin VSSOP and SOIC Packages

Key Specifications

  • Supply Voltage 3.0 to 3.6 V
  • Supply Current, Conv. Rate = 1 Hz 350 µA (typ)
  • Remote Diode Temperature Accuracy
    • TA = 25°C to 85°C; TD = 50°C to 105°C, ±0.75 °C (max)
    • TA = 25°C to 85°C; TD = 40°C to 125°C, ±1.5 °C (max)
  • Local Temperature Accuracy
    • TA = 25°C to 100°C, ±2.0 °C (max)
  • Conversion Rate, Both Channels 16 to 0.4 Hz

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Description

The LM95245 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) interface and TruTherm technology that can monitor the temperature of a remote diode as well as its own temperature. The LM95245 can be used to very accurately monitor the temperature of external devices such as microprocessors. TruTherm technology allows the LM95245 to precisely monitor thermal diodes found in 90 nm and smaller geometry processes. The LM95245 is specifically targeted for Intel processors on 45nm process. LM95245 reports temperature in two different formats for +127.875°C/-128°C range and 0°C/255°C range. The LM95245 T_CRIT and OS outputs are asserted when either unmasked channel exceeds its programmed limit and can be used to shutdown the system, to turn on the system fans, or as a microcontroller interrupt function. The current status of the T_CRIT and OS pins can be read back from the status registers via the SMBus interface. All limits have a shared programmable hysteresis register.

The remote temperature channel of the LM95245 has a programmable digital filter. The LM95245 is targeted for a typical Intel® processor on a 45 nm, 65 nm or 90nm process, and has an offset register for maximum flexibility and best accuracy.

The LM95245 has a three-level address pin to connect up to 3 devices to the same SMBus master, that is shared with the OS output. The LM95245 has a programmable conversion rate register and a standby mode to save power. One conversion can be triggered in standby mode by writing to the one-shot register.

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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 Precision Diode Digital Temp Sensor w/TruTherm BJT Comp Tech for 45nm Process datasheet (Rev. G) Mar. 22, 2013
Technical articles How to choose the right thermistor for your temperature sensing application Feb. 12, 2020
Technical articles How to enable thermal safety for automotive infotainment and cluster systems Oct. 15, 2019
Technical articles Driving industrial innovation with small-size sensors Sep. 12, 2019
Technical articles How sensor technology is evolving to meet cold chain needs Jun. 18, 2018

Design & development

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

Software development

DRIVERS & LIBRARIES Download
Linux Driver for LM95245
LM95245SW-LINUX The Linux driver supports the LM95245 series of Remote and Local Temp Sensors. 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:
  • (...)
DRIVERS & LIBRARIES Download
Eval Board Software For Hardware Monitors And Digital Temperature Sensors
SENSOREVAL SensorEval
SensorEval software supports the latest TI temperature sensor and hardware monitor evaluation boards via USB interface. It also allows access to sensors mounted directly on motherboards that support Intel chip sets.

  • Download SensorEval Software and Manual
  • Windows XP support is offered for (...)

Design tools & simulation

SIMULATION MODELS Download
SNIM006.ZIP (25 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

Ordering & quality

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