LM95221 Series

±3°C dual remote & local temperature sensor with beta compensation and SMBus, I2C

Catalog

±3°C dual remote & local temperature sensor with beta compensation and SMBus, I2C

Part	Output Type	Sensing Temperature - Local [Max]	Mounting Type	Resolution	Accuracy - Highest (Lowest)	Sensing Temperature - Remote [Max]	Package / Case	Package / Case [custom]	Package / Case	Test Condition [Max]	Operating Temperature [Max]	Features	Voltage - Supply [Max]	Voltage - Supply [Min]
Texas Instruments LM95221CIMMX/NOPB	SMBus	85 °C	Surface Mount	9 b 10 b	3 °C	85 °C	8-MSOP 8-TSSOP	0.118 in	3 mm	85 °C	115 °C	One-Shot Programmable Resolution Shutdown Mode Standby Mode	3.6 V	3 V
Texas Instruments LM95221CIMMX	SMBus	85 °C	Surface Mount	9 b 10 b	3 °C	85 °C	8-MSOP 8-TSSOP	0.118 in	3 mm	85 °C	115 °C	One-Shot Programmable Resolution Shutdown Mode Standby Mode	3.6 V	3 V
Texas Instruments LM95221CIMM/NOPB	SMBus	85 °C	Surface Mount	9 b 10 b	3 °C	85 °C	8-MSOP 8-TSSOP	0.118 in	3 mm	85 °C	115 °C	One-Shot Programmable Resolution Shutdown Mode Standby Mode	3.6 V	3 V
Texas Instruments LM95221CIMM	SMBus	85 °C	Surface Mount	9 b 10 b	3 °C	85 °C	8-MSOP 8-TSSOP	0.118 in	3 mm	85 °C	115 °C	One-Shot Programmable Resolution Shutdown Mode Standby Mode	3.6 V	3 V

Catalog

±3°C dual remote & local temperature sensor with beta compensation and SMBus, I2C

Key Features

• Accurately Senses Die Temperature of Remote ICs or Diode JunctionsRemote Diode Fault DetectionOn-board Local Temperature SensingRemote Temperature Readings0.125°C LSb10-bits Plus Sign or 11-bits Programmable Resolution11-bits Resolves Temperatures Above 127°CLocal Temperature Readings0.25°C9-bits Plus SignStatus Register SupportProgrammable Conversion Rate Allows User Optimization of Power ConsumptionShutdown Mode One-shot Conversion ControlSMBus 2.0 Compatible Interface, Supports TIMEOUT8-pin VSSOP PackageKey SpecificationsLocal Temperature AccuracyTA= 0°C to 85°C ± 3.0°C (max)Remote Diode Temperature AccuracyTA= 30°C to 50°C, TD = 45°C to 85°C±1.0 °C (Max)TA= 0°C to 85°C, TD = 25°C to 140°C±3.0°C (Max)Supply Voltage 3.0 V to 3.6 VSupply Current 2 mA (Typ)All trademarks are the property of their respective owners.Accurately Senses Die Temperature of Remote ICs or Diode JunctionsRemote Diode Fault DetectionOn-board Local Temperature SensingRemote Temperature Readings0.125°C LSb10-bits Plus Sign or 11-bits Programmable Resolution11-bits Resolves Temperatures Above 127°CLocal Temperature Readings0.25°C9-bits Plus SignStatus Register SupportProgrammable Conversion Rate Allows User Optimization of Power ConsumptionShutdown Mode One-shot Conversion ControlSMBus 2.0 Compatible Interface, Supports TIMEOUT8-pin VSSOP PackageKey SpecificationsLocal Temperature AccuracyTA= 0°C to 85°C ± 3.0°C (max)Remote Diode Temperature AccuracyTA= 30°C to 50°C, TD = 45°C to 85°C±1.0 °C (Max)TA= 0°C to 85°C, TD = 25°C to 140°C±3.0°C (Max)Supply Voltage 3.0 V to 3.6 VSupply Current 2 mA (Typ)All trademarks are the property of their respective owners.

Description

The LM95221 is a dual remote diode temperature sensor in an 8-lead VSSOP package. The 2-wire serial interface of the LM95221 is compatible with SMBus 2.0. The LM95221 can sense three temperature zones, it can measure the temperature of its own die as well as two diode connected transistors. The diode connected transistors can be a thermal diode as found in Pentium and AMD processors or can simply be a diode connected MMBT3904 transistor. The LM95221 resolution format for remote temperature readings can be programmed to be 10-bits plus sign or 11-bits unsigned. In the unsigned mode the LM95221 remote diode readings can resolve temperatures above 127°C. Local temperature readings have a resolution of 9-bits plus sign. The temperature of any ASIC can be accurately determined using the LM95221 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM95221 remote sensor accuracy of ±1°C is factory trimmed for a series resistance of 2.7 ohms and 1.008 non-ideality factor. The LM95221 is a dual remote diode temperature sensor in an 8-lead VSSOP package. The 2-wire serial interface of the LM95221 is compatible with SMBus 2.0. The LM95221 can sense three temperature zones, it can measure the temperature of its own die as well as two diode connected transistors. The diode connected transistors can be a thermal diode as found in Pentium and AMD processors or can simply be a diode connected MMBT3904 transistor. The LM95221 resolution format for remote temperature readings can be programmed to be 10-bits plus sign or 11-bits unsigned. In the unsigned mode the LM95221 remote diode readings can resolve temperatures above 127°C. Local temperature readings have a resolution of 9-bits plus sign. The temperature of any ASIC can be accurately determined using the LM95221 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM95221 remote sensor accuracy of ±1°C is factory trimmed for a series resistance of 2.7 ohms and 1.008 non-ideality factor.