Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

LM95221 Datasheet(PDF) 8 Page - Texas Instruments

Click here to check the latest version.
Part # LM95221
Description  Dual Remote Diode Digital Temperature Sensor with SMBus Interface
Download  25 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM95221 Datasheet(HTML) 8 Page - Texas Instruments

Back Button LM95221 Datasheet HTML 4Page - Texas Instruments LM95221 Datasheet HTML 5Page - Texas Instruments LM95221 Datasheet HTML 6Page - Texas Instruments LM95221 Datasheet HTML 7Page - Texas Instruments LM95221 Datasheet HTML 8Page - Texas Instruments LM95221 Datasheet HTML 9Page - Texas Instruments LM95221 Datasheet HTML 10Page - Texas Instruments LM95221 Datasheet HTML 11Page - Texas Instruments LM95221 Datasheet HTML 12Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 25 page
background image
LM95221
SNIS134B – MAY 2004 – REVISED MARCH 2013
www.ti.com
FUNCTIONAL DESCRIPTION
The LM95221 is a digital sensor that can sense the temperature of 3 thermal zones using a sigma-delta analog-
to-digital converter. It can measure its local die temperature and the temperature of two diode connected
MMBT3904 transistors using a
ΔVbe temperature sensing method. The 2-wire serial interface, of the LM95221, is
compatible with SMBus 2.0 and I2C. Please see the SMBus 2.0 specification for a detailed description of the
differences between the I2C bus and SMBus.
The temperature conversion rate is programmable to allow the user to optimize the current consumption of the
LM95221 to the system requirements. The LM95221 can be placed in shutdown to minimize power consumption
when temperature data is not required. While in shutdown, a 1-shot conversion mode allows system control of
the conversion rate for ultimate flexibility.
The remote diode temperature resolution is eleven bits and is programmable to 11-bits unsigned or 10-bits plus
sign. The least-significant-bit (LSb) weight for both resolutions is 0.125°C. The unsigned resolution allows the
remote diodes to sense temperatures above 127°C. Local temperature resolution is not programmable and is
always 9-bits plus sign and has a 0.25°C LSb.
The LM95221 remote diode temperature accuracy will be trimmed for the thermal diode of a Prescott processor
and the accuracy will be ensured only when using this diode.
Diode fault detection circuitry in the LM95221 can detect the presence of a remote diode: whether D+ is shorted
to VDD, D- or ground, or whether D+ is floating.
The LM95221 register set has an 8-bit data structure and includes:
1. Most-Significant-Byte (MSB) Local Temperature Register
2. Least-Significant-Byte (LSB) Local Temperature Register
3. MSB Remote Temperature 1 Register
4. LSB Remote Temperature 1 Register
5. MSB Remote Temperature 2 Register
6. LSB Remote Temperature 2 Register
7. Status Register: busy, diode fault
8. Configuration Register: resolution control, conversion rate control, standby control
9. 1-shot Register
10. Manufacturer ID
11. Revision ID
CONVERSION SEQUENCE
The LM95221 takes approximately 66 ms to convert the Local Temperature, Remote Temperature 1 and 2, and
to update all of its registers. Only during the conversion process the busy bit (D7) in the Status register (02h) is
high. These conversions are addressed in a round robin sequence. The conversion rate may be modified by the
Conversion Rate bits found in the Configuration Register (03h). When the conversion rate is modified a delay is
inserted between conversions, the actual conversion time remains at 66ms (26 ms for each remote and 14 ms
for local). Different conversion rates will cause the LM95221 to draw different amounts of supply current as
shown in Figure 7.
8
Submit Documentation Feedback
Copyright © 2004–2013, Texas Instruments Incorporated
Product Folder Links: LM95221


Similar Part No. - LM95221

ManufacturerPart #DatasheetDescription
logo
National Semiconductor ...
LM95221 NSC-LM95221 Datasheet
282Kb / 16P
   Dual Remote Diode Digital Temperature Sensor with SMBus Interface
LM95221CIMM NSC-LM95221CIMM Datasheet
282Kb / 16P
   Dual Remote Diode Digital Temperature Sensor with SMBus Interface
LM95221CIMMX NSC-LM95221CIMMX Datasheet
282Kb / 16P
   Dual Remote Diode Digital Temperature Sensor with SMBus Interface
More results

Similar Description - LM95221

ManufacturerPart #DatasheetDescription
logo
National Semiconductor ...
LM95221 NSC-LM95221 Datasheet
282Kb / 16P
   Dual Remote Diode Digital Temperature Sensor with SMBus Interface
LM95231 NSC-LM95231 Datasheet
464Kb / 4P
   TruTherm Precision Dual Remote Diode Temperature Sensor with SMBus Interface
logo
List of Unclassifed Man...
G766 ETC1-G766 Datasheet
248Kb / 13P
   Remote Temperature Sensor with SMBus Serial Interface
logo
Maxim Integrated Produc...
MAX1618 MAXIM-MAX1618 Datasheet
430Kb / 20P
   Remote Temperature Sensor with SMBus Serial Interface
19-1495; Rev 1; 10/99
logo
National Semiconductor ...
LM95214 NSC-LM95214 Datasheet
794Kb / 38P
   Quad Remote Diode and Local Temperature Sensor with SMBus Interface
logo
Texas Instruments
LM95231 TI-LM95231_15 Datasheet
1Mb / 30P
[Old version datasheet]   Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm??Technology
logo
National Semiconductor ...
LM95231 NSC-LM95231_06 Datasheet
704Kb / 20P
   Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technology
logo
Texas Instruments
LM95214 TI-LM95214_15 Datasheet
1Mb / 44P
[Old version datasheet]   Quad Remote Diode and Local Temperature Sensor with SMBus Interface
logo
Maxim Integrated Produc...
MAX1617A MAXIM-MAX1617A_12 Datasheet
343Kb / 20P
   Remote/Local Temperature Sensor with SMBus Serial Interface
Rev 1; 10/12
logo
Global Mixed-mode Techn...
G767 GMT-G767 Datasheet
393Kb / 14P
   Remote/Local Temperature Sensor with SMBus Serial Interface
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com