Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsTMP125AIDBVR

FEATURES

D DIGITAL OUTPUT: SPI-Compatible Interface

D RESOLUTION: 10-Bit, 0.25°C

D ACCURACY:

±2.0°C (max) from −25°C to +85°C

±2.5°C (max) from −40°C to +125°C

D LOW QUIESCENT CURRENT: 50µA (max)

D WIDE SUPPLY RANGE: 2.7V to 5.5V

D TINY SOT23-6 PACKAGE

D OPERATION FROM −40°C to +125°C

APPLICATIONS

D BASE STATION EQUIPMENT

D COMPUTER PERIPHERAL THERMAL

PROTECTION

D NOTEBOOK COMPUTERS

D DATA ACQUISITION SYSTEMS

D TELECOM EQUIPMENT

D OFFICE MACHINES

TMP125 RELATED PRODUCTS

FEATURES PRODUCT

2°C Digital Temp Sensors with Two-Wire Interface TMP100/101

1.5°C Digital Temp Sensors with Two-Wire Interface TMP75/175

1.5°C Digital Temp Sensors with SPI TMP121/123

1.5°C Programmable Digital Temp Sensors with SPI TMP122/124

DESCRIPTION

The TMP125 is an SPI-compatible temperature sensor

available in the tiny SOT23-6 package. Requiring no

external components, the TMP125 is capable of

measuring temperatures within 2°C of accuracy over a

temperature range of −25°C to +85°C and 2.5°C of

accuracy over −40°C to +125°C. Low supply current, and

a supply range from 2.7V to 5.5V, make the TMP125 an

excellent candidate for low-power applications.

The TMP125 is ideal for extended thermal measurement

in a variety of communication, computer, consumer,

environmental, industrial, and instrumentation

applications.

Diode

Te mp .

Sensor

∆Σ

A/D

Converter

OSC

Control

Logic

Serial

Interface

Config.

and Temp.

TMP125

Temperature

GND 1

V+

SCK

TMP125

SBOS323A − DECEMBER 2004 − REVISED JUNE 2005

2°C Accurate Digital Temperature Sensor

with SPI Interface

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          

 !     !   

www.ti.com

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.

SPI is a registered trademark of Motorola. All other trademarks are the property of their respective owners.

Summary of content (12 pages)

PAGE 1
TMP125 SBOS323A − DECEMBER 2004 − REVISED JUNE 2005 2°C Accurate Digital Temperature Sensor with SPI Interface FEATURES DESCRIPTION D DIGITAL OUTPUT: SPI-Compatible Interface D RESOLUTION: 10-Bit, 0.25°C D ACCURACY: The TMP125 is an SPI-compatible temperature sensor available in the tiny SOT23-6 package. Requiring no external components, the TMP125 is capable of measuring temperatures within 2°C of accuracy over a temperature range of −25°C to +85°C and 2.5°C of accuracy over −40°C to +125°C.
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" #$% www.ti.com SBOS323A − DECEMBER 2004 − REVISED JUNE 2005 This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ABSOLUTE MAXIMUM RATINGS(1) Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7V Input Voltage(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.
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" #$% www.ti.com SBOS323A − DECEMBER 2004 − REVISED JUNE 2005 ELECTRICAL CHARACTERISTICS At TA = −40°C to +125°C and VS = +2.7V to 5.5V, unless otherwise noted. TMP125 PARAMETER CONDITIONS MIN TYP MAX UNIT TEMPERATURE INPUT +125 °C −25°C to +85°C ±0.5 ±2.0 °C −40°C to +125°C ±1.0 ±2.5 Range −40 Accuracy (temperature error) °C Resolution 10 Bits Temperature Measurement Noise 0.1 LSB DIGITAL INPUT/OUTPUT Input Logic Levels: VIH VIL Input Current, SI, SCK, CS 0.
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" #$% www.ti.com SBOS323A − DECEMBER 2004 − REVISED JUNE 2005 TYPICAL CHARACTERISTICS At TA = −40°C to +125°C and VS = +2.7V to 5.5V, unless otherwise noted. CONVERSION TIME vs TEMPERATURE QUIESCENT CURRENT vs TEMPERATURE 80 45 VS = 5.5V Conversion Time (ms) 40 IQ (µA) VS = 5.5V 75 35 30 70 65 60 55 50 25 Active Conversion Serial Bus Inactive 20 45 5 Typical Units Shown 40 −55 −35 −15 5 25 45 65 85 105 −55 125 −35 −15 5 TEMPERATURE ACCURACY vs TEMPERATURE 2.
PAGE 5
" #$% www.ti.com SBOS323A − DECEMBER 2004 − REVISED JUNE 2005 APPLICATIONS The TMP125 10-bit, read-only digital temperature sensor is optimal for thermal management and thermal protection applications. The TMP125 is specified for a temperature range of −40°C to +125°C, with operation extending down to −55°C. It is specified for a supply voltage range of 2.7V to 5.5V, and also features a hardware shutdown to provide power savings. Quiescent current is reduced to 1µA during analog shutdown.
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" #$% www.ti.com SBOS323A − DECEMBER 2004 − REVISED JUNE 2005 Timing Diagrams The TMP125 is SPI-compatible. Figure 3 and Figure 4 describe the output data of the TMP125. Figure 5, Figure 6, and Figure 7 describe the various timing requirements, with parameters defined in Table 3.
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" #$% www.ti.com SBOS323A − DECEMBER 2004 − REVISED JUNE 2005 SCK SCK t2 t2 t4 t4 CS CS SO SO Figure 5. Input Data Timing Diagram SCK t5 t1 t3 CS t6 SO Figure 6. Output Data Timing Diagram SCK SCK CS CS t7 t7 SI SI Figure 7.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.