LM95221CIMM NOPB ,Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus, I2C Interface 8-VSSOP 0 to 85Block Diagram3.0V-3.6VLM95221LocalDiode Selector'-6Converter11-Bit or 10-Bit Plus Sign RemoteD+ Te ..
LM95221CIMMX ,Dual Remote Diode Digital Temperature Sensor with SMBus InterfacePin DescriptionsLabel Pin # Function Typical ConnectionD1+ 1 Diode Current Source To Diode Anode. C ..
LM95221CIMMX/NOPB ,Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus, I2C Interface 8-VSSOP 0 to 85FEATURES APPLICATIONS2• Accurately Senses Die Temperature of Remote • Processor/Computer System The ..
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LM95221CIMM NOPB-LM95221CIMMX/NOPB
Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus, I2C Interface 8-VSSOP 0 to 85
LM95221
www.ti.com SNIS134B –MAY 2004–REVISED MARCH 2013
LM95221 Dual Remote Diode Digital Temperature Sensor with SMBus Interface
Checkfor Samples: LM95221
1FEATURES APPLICATIONS Accurately Senses Die Temperatureof Remote • Processor/Computer System Thermal
ICsor Diode Junctions Management (e.g. Laptop, Desktop,
Workstations, Server)• Remote Diode Fault Detection Electronic Test Equipment• On-board Local Temperature Sensing Office Electronics• Remote Temperature Readings 0.125°C LSb DESCRIPTION– 10-bits Plus Signor 11-bits Programmable The LM95221isa dual remote diode temperature
Resolution sensorin an 8-lead VSSOP package. The 2-wire
11-bits Resolves Temperatures Above serial interfaceof the LM95221is compatible with
127°C SMBus 2.0. The LM95221 can sense three
temperature zones,it can measure the temperature
• Local Temperature Readings of its own die as well as two diode connected
– 0.25°C transistors. The diode connected transistors can bea
9-bits Plus Sign thermal diode as found in Pentium and AMD
processors or can simply bea diode connected
• Status Register Support MMBT3904 transistor. The LM95221 resolution
• Programmable Conversion Rate Allows User format for remote temperature readings can be
Optimizationof Power Consumption programmed to be 10-bits plus sign or 11-bits
Shutdown Mode One-shot Conversion Control unsigned.In the unsigned mode the LM95221 remote
diode readings can resolve temperatures above
• SMBus 2.0 Compatible Interface, Supports 127°C. Local temperature readings havea resolution
TIMEOUT of 9-bits plus sign.
• 8-pin VSSOP PackageThe temperature of any ASIC can be accurately
determined using the LM95221 as long as a
KEY SPECIFICATIONS dedicated diode (semiconductor junction)is available
• Local Temperature Accuracy on the target die. The LM95221 remote sensor
TA= 0°Cto 85°C± 3.0°C (max) accuracyof ±1°Cis factory trimmed fora series
resistanceof 2.7 ohms and 1.008 non-ideality factor.
• Remote Diode Temperature Accuracy TD= 45°Cto 85°C TDto 140°C
