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LM95221 Datasheet(PDF) 1 Page - Texas Instruments |
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LM95221 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 25 page LM95221 www.ti.com SNIS134B – MAY 2004 – REVISED MARCH 2013 LM95221 Dual Remote Diode Digital Temperature Sensor with SMBus Interface Check for Samples: LM95221 1 FEATURES APPLICATIONS 2 • Accurately Senses Die Temperature of Remote • Processor/Computer System Thermal ICs or 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 Sign or 11-bits Programmable The LM95221 is a dual remote diode temperature Resolution sensor in an 8-lead VSSOP package. The 2-wire – 11-bits Resolves Temperatures Above serial interface of the LM95221 is 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 be a – 9-bits Plus Sign thermal diode as found in Pentium and AMD processors or can simply be a diode connected • Status Register Support MMBT3904 transistor. The LM95221 resolution • Programmable Conversion Rate Allows User format for remote temperature readings can be Optimization of 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 have a resolution TIMEOUT of 9-bits plus sign. • 8-pin VSSOP Package The 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°C to 85°C ± 3.0°C (max) accuracy of ±1°C is factory trimmed for a series resistance of 2.7 ohms and 1.008 non-ideality factor. • Remote Diode Temperature Accuracy – TA = 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 V • Supply Current 2 mA (Typ) 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2004–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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