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LM95221

Texas Instruments
Part Number LM95221
Manufacturer Texas Instruments
Description Dual Remote Diode Digital Temperature Sensor
Published Jan 11, 2022
Detailed Description LM95221 www.ti.com SNIS134B – MAY 2004 – REVISED MARCH 2013 LM95221 Dual Remote Diode Digital Temperature Sensor with...
Datasheet PDF File LM95221 PDF File

LM95221
LM95221

Overview
LM95221 www.
ti.
com SNIS134B – MAY 2004 – REVISED MARCH 2013 LM95221 Dual Remote Diode Digital Temperature Sensor with SMBus Interface Check for Samples: LM95221 FEATURES 1 •2 Accurately Senses Die Temperature of Remote ICs or Diode Junctions • Remote Diode Fault Detection • On-board Local Temperature Sensing • Remote Temperature Readings – 0.
125°C LSb – 10-bits Plus Sign or 11-bits Programmable Resolution – 11-bits Resolves Temperatures Above 127°C • Local Temperature Readings – 0.
25°C – 9-bits Plus Sign • Status Register Support • Programmable Conversion Rate Allows User Optimization of Power Consumption • Shutdown Mode One-shot Conversion Control • SMBus 2.
0 Compatible Interface, Supports TIMEOUT • 8-pin VSSOP Package KEY SPECIFICATIONS • Local Temperature Accuracy – TA = 0°C to 85°C ± 3.
0°C (max) • 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) APPLICATIONS • Processor/Computer System Thermal Management (e.
g.
Laptop, Desktop, Workstations, Server) • Electronic Test Equipment • Office Electronics 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 ded...


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