Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsTMP112AIDRLT

TMP1

FEATURES DESCRIPTION

APPLICATIONS

Population

-0.50

0.42

-0.34

-0.26

-0.18

0.10

-0.02

0.06

0.14

0.22

0.30

TemperatureError( C)°

TMP112

www.ti.com

......................................................................................................................................................... SBOS473B – MARCH 2009 – REVISED JUNE 2009

High-Accuracy, Low-Power, Digital Temperature Sensor

With SMBus™/Two-Wire Serial Interface in SOT563

• TINY SOT563 PACKAGE

The TMP112 is a two-wire, serial output temperature

sensor available in a tiny SOT563 package. Requiring

• ACCURACY:

no external components, the TMP112 is capable of

0.5 ° C (max) from 0 ° C to +65 ° C

reading temperatures to a resolution of 0.0625 ° C.

1.0 ° C (max) from – 40 ° C to +125 ° C

The TMP112 slope-specification allows users to

• LOW QUIESCENT CURRENT:

calibrate for higher accuracy.

10 µ A Active (max), 1 µ A Shutdown (max)

The TMP112 features both SMBus and two-wire

• SUPPLY RANGE: 1.4V to 3.6V

interface compatibility, and allows up to four devices

• RESOLUTION: 12 Bits

on one bus. It also features an SMBus alert function.

• DIGITAL OUTPUT: Two-Wire Serial Interface

The TMP112 is ideal for extended temperature

measurement in communication, computer,

consumer, environmental, industrial, and

• PORTABLE AND BATTERY-POWERED

instrumentation applications. It is specified for

APPLICATIONS

operation over a temperature range of – 40 ° C to

+125 ° C.

• POWER-SUPPLY TEMPERATURE

MONITORING

TEMPERATURE ERROR AT +25 ° C

• COMPUTER PERIPHERAL THERMAL

PROTECTION

• NOTEBOOK COMPUTERS

• BATTERY MANAGEMENT

• OFFICE MACHINES

• THERMOSTAT CONTROLS

• ELECTROMECHANICAL DEVICE

TEMPERATURES

• GENERAL TEMPERATURE MEASUREMENTS:

Industrial Controls

Test Equipment

Medical Instrumentation

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 SMBus is a trademark of Intel, Inc.

3 All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (25 pages)

PAGE 1
TMP112 TM P1 12 www.ti.com ......................................................................................................................................................... SBOS473B – MARCH 2009 – REVISED JUNE 2009 High-Accuracy, Low-Power, Digital Temperature Sensor With SMBus™/Two-Wire Serial Interface in SOT563 0.30 0.22 0.14 0.06 -0.02 • -0.10 • • • • • TEMPERATURE ERROR AT +25°C -0.
PAGE 2
TMP112 SBOS473B – MARCH 2009 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com 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.
PAGE 3
TMP112 www.ti.com ......................................................................................................................................................... SBOS473B – MARCH 2009 – REVISED JUNE 2009 ELECTRICAL CHARACTERISTICS At TA = +25°C and VS = +1.4V to +3.6V, unless otherwise noted. TMP112 PARAMETER CONDITIONS MIN +25°C, VS = 3.3V –0.5 0°C to +65°C, VS = 3.3V –0.5 –40°C to +125°C –1.0 TYP MAX UNIT +125 °C +0.3 °C +0.
PAGE 4
TMP112 SBOS473B – MARCH 2009 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS At TA = +25°C and V+ = 3.3V, unless otherwise noted. ACCURACY vs SUPPLY -0.250 -0.225 -0.200 -0.175 -0.150 -0.125 -0.100 -0.075 -0.050 -0.025 0 0.025 0.050 0.075 0.100 0.125 0.150 0.175 0.200 0.225 0.250 0.30 0.22 0.14 0.06 -0.02 -0.10 -0.18 -0.26 -0.34 -0.
PAGE 5
TMP112 www.ti.com ......................................................................................................................................................... SBOS473B – MARCH 2009 – REVISED JUNE 2009 TYPICAL CHARACTERISTICS (continued) At TA = +25°C and V+ = 3.3V, unless otherwise noted. CONVERSION TIME vs TEMPERATURE 40 Conversion Time (ms) 38 36 34 32 30 1.4V Supply 28 26 3.6V Supply 24 22 20 -60 -40 -20 0 20 40 60 80 100 120 140 160 Temperature (°C) Figure 7.
PAGE 6
TMP112 SBOS473B – MARCH 2009 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com APPLICATION INFORMATION The TMP112 is a digital temperature sensor that is optimal for thermal-management and thermal-protection applications. A block diagram of the TMP112 is shown in Figure 8.
PAGE 7
TMP112 www.ti.com ......................................................................................................................................................... SBOS473B – MARCH 2009 – REVISED JUNE 2009 POINTER REGISTER TEMPERATURE REGISTER Figure 11 shows the internal register structure of the TMP112. The 8-bit Pointer Register of the device is used to address a given data register.
PAGE 8
TMP112 SBOS473B – MARCH 2009 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com Table 5. 12-Bit Temperature Data Format (1) (1) TEMPERATURE (°C) DIGITAL OUTPUT (BINARY) HEX 128 0111 1111 1111 7FF 127.9375 0111 1111 1111 7FF 100 0110 0100 0000 640 80 0101 0000 0000 500 75 0100 1011 0000 4B0 50 0011 0010 0000 320 25 0001 1001 0000 190 0.
PAGE 9
TMP112 www.ti.com ......................................................................................................................................................... SBOS473B – MARCH 2009 – REVISED JUNE 2009 CONFIGURATION REGISTER CONVERSION RATE The Configuration Register is a 16-bit read/write register used to store bits that control the operational modes of the temperature sensor. Read/write operations are performed MSB first.
PAGE 10
TMP112 SBOS473B – MARCH 2009 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com POLARITY (POL) CONVERTER RESOLUTION (R1/R0) The Polarity bit allows the user to adjust the polarity of the ALERT pin output. If POL = 0, the ALERT pin becomes active low, as shown in Figure 13. For POL = 1, the ALERT pin becomes active high, and the state of the ALERT pin is inverted.
PAGE 11
TMP112 www.ti.com ......................................................................................................................................................... SBOS473B – MARCH 2009 – REVISED JUNE 2009 Both operating modes are represented in Figure 13. Table 10 and Table 11 describe the format for the THIGH and TLOW registers. Note that the most significant byte is sent first, followed by the least significant byte.
PAGE 12
TMP112 SBOS473B – MARCH 2009 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com reads from the same register are desired, it is not necessary to continually send the Pointer Register bytes, because the TMP112 remembers the Pointer Register value until it is changed by the next write operation.
PAGE 13
TMP112 www.ti.com ......................................................................................................................................................... SBOS473B – MARCH 2009 – REVISED JUNE 2009 NOISE The TMP112 is a very low-power device and generates very low noise on the supply bus. Applying an RC filter to the V+ pin of the TMP112 can further reduce any noise that the TMP112 might propagate to other components.
PAGE 14
TMP112 SBOS473B – MARCH 2009 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com TWO-WIRE TIMING DIAGRAMS t(LOW) tF tR t(HDSTA) SCL t(HDSTA) t(HIGH) t(SUSTO) t(SUSTA) t(HDDAT) t(SUDAT) SDA t(BUF) P S S P Figure 15.
PAGE 15
TMP112 www.ti.com .........................................................................................................................................................
PAGE 16
TMP112 SBOS473B – MARCH 2009 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com CALIBRATING FOR IMPROVED ACCURACY There are many temperature monitoring applications that require better than 0.5°C accuracy over a limited temperature range.
PAGE 17
TMP112 www.ti.com .........................................................................................................................................................
PAGE 18
TMP112 SBOS473B – MARCH 2009 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com USING THE SLOPE SPECIFICATIONS WITH A 1-POINT CALIBRATION The initial accuracy assurance at +25°C with the slope regions provides an accuracy that is high enough for most applications; however, if higher accuracy is desired, this increase can be achieved with a 1-point calibration at +25°C.
PAGE 19
TMP112 www.ti.com ......................................................................................................................................................... SBOS473B – MARCH 2009 – REVISED JUNE 2009 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (March 2009) to Revision B ..................................................................................................
PAGE 20
PACKAGE OPTION ADDENDUM www.ti.
PAGE 21
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TMP112AIDRLR SOT DRL 6 4000 180.0 9.5 1.78 1.78 0.69 4.0 8.0 Q3 TMP112AIDRLR SOT DRL 6 4000 180.0 8.4 1.98 1.78 0.69 4.0 8.0 Q3 TMP112AIDRLT SOT DRL 6 250 180.0 8.4 1.98 1.78 0.69 4.0 8.
PAGE 22
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TMP112AIDRLR SOT DRL 6 4000 180.0 180.0 30.0 TMP112AIDRLR SOT DRL 6 4000 202.0 201.0 28.0 TMP112AIDRLT SOT DRL 6 250 202.0 201.0 28.0 TMP112AIDRLT SOT DRL 6 250 180.0 180.0 30.
PAGE 23
PAGE 24
PAGE 25
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.