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TMP122

TMP124

SBOS272B – JUNE 2003 – REVISED DECEMBER 2003

www.ti.com

DESCRIPTION

The TMP122 and TMP124 are SPI-compatible temperature

sensors available in SOT23-6 and SO-8 packages. Requir-

ing only a pull-up resistor for complete function, the TMP122

and TMP124 temperature sensors are capable of measuring

temperatures within 2°C of accuracy over a temperature

range of –40°C to +125°C, with operation up to 150°C.

Programmable resolution, programmable set points and shut

down function provide versatility for any application. Low

supply current and a supply range from 2.7V to 5.5V make

the TMP122 and TMP124 excellent candidates for low-

power applications.

The TMP122 and TMP124 are ideal for extended thermal

measurement in a variety of communication, computer, con-

sumer, environmental, industrial, and instrumentation appli-

cations.

FEATURES

● DIGITAL OUTPUT: SPI-Compatible Interface

● PROGRAMMABLE RESOLUTION:

9- to 12-Bits + Sign

● ACCURACY:

±1.5°C from –25°C to +85°C (max)

±2.0°C from –40°C to +125°C (max)

● LOW QUIESCENT CURRENT: 50µA

● WIDE SUPPLY RANGE: 2.7V to 5.5V

● TINY SOT23-6 AND SO-8 PACKAGES

● OPERATION TO 150°C

● PROGRAMMABLE HIGH/LOW SETPOINTS

Copyright © 2003, Texas Instruments Incorporated

1.5°C Accurate Programmable

Digital Temperature Sensors

with SPI™ Interface

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.

APPLICATIONS

● POWER-SUPPLY TEMPERATURE MONITORING

● COMPUTER PERIPHERAL THERMAL PROTECTION

● NOTEBOOK COMPUTERS

● CELL PHONES

● BATTERY MANAGEMENT

● OFFICE MACHINES

● THERMOSTAT CONTROLS

● ENVIRONMENTAL MONITORING and HVAC

● ELECTROMECHANICAL DEVICE TEMPERATURE

Diode

Temp.

Sensor

∆Σ

A/D

Converter

OSC

Control

Logic

Serial

Interface

Config

and Temp

Register

TMP122

Temperature

GND

ALERT

1

2

3

6

5

4

V+

SO/I

CS

SCK

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

Diode

Temp.

Sensor

∆Σ

A/D

Converter

OSC

Control

Logic

Serial

Interface

Config

and Temp

Register

TMP124

Temperature

SCK

SO/I

1

2

3

8

7

6

NC

V+

CS

NC

45

GND

ALERT

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Summary of content (19 pages)

PAGE 1
TMP122 TMP124 SBOS272B – JUNE 2003 – REVISED DECEMBER 2003 1.5°C Accurate Programmable Digital Temperature Sensors with SPI™ Interface FEATURES DESCRIPTION ● DIGITAL OUTPUT: SPI-Compatible Interface ● PROGRAMMABLE RESOLUTION: 9- to 12-Bits + Sign ● ACCURACY: ±1.5°C from –25°C to +85°C (max) ±2.0°C from –40°C to +125°C (max) ● LOW QUIESCENT CURRENT: 50µA ● WIDE SUPPLY RANGE: 2.7V to 5.
PAGE 2
ELECTROSTATIC DISCHARGE SENSITIVITY ABSOLUTE MAXIMUM RATINGS(1) Power Supply, V+ .................................................................................. 7V Input Voltage(2) ....................................................................... –0.3V to 7V Input Current ..................................................................................... 10mA Operating Temperature Range ...................................... –55°C to +150°C Storage Temperature Range .............................
PAGE 3
ELECTRICAL CHARACTERISTICS At TA = –40°C to +125°C, and V+ = 2.7V to 5.5V, unless otherwise noted. TMP122, TMP124 PARAMETER CONDITION TEMPERATURE INPUT Range Accuracy (Temperature Error) –0.
PAGE 4
TYPICAL CHARACTERISTICS At TA = +25°C, and V+ = 5.0V, unless otherwise noted. QUIESCENT CURRENT vs TEMPERATURE SHUTDOWN CURRENT vs TEMPERATURE 70 1.0 0.9 0.8 60 0.7 0.6 ISD (µA) IQ (µA) V+ = 5V 50 0.5 0.4 0.3 V+ = 2.7V 0.2 40 0.1 0.0 Serial Bus Inactive –0.1 30 –60 –40 –20 0 20 40 60 80 100 120 140 –60 –40 –20 0 Temperature (°C) 20 40 60 80 100 120 140 Temperature (°C) TEMPERATURE ACCURACY vs TEMPERATURE CONVERSION TIME vs TEMPERATURE 2.
PAGE 5
APPLICATIONS INFORMATION COMMUNICATING WITH THE TMP122 The TMP122/TMP124 converts continuously. If CS is brought low during a conversion the conversion process continues, but the last completed conversion is available at the output register. Communication with the TMP122/TMP124 is initiated by pulling CS low. The first 16 clocks of data transfer will return temperature data from the temperature sensors. The 16-bit data word is clocked out sign bit first, followed by the MSB.
PAGE 6
CS CS 16-Bit READ SO/I 16-Bit WRITE/ Embedded Address ... SCK SO/I (Continued) D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 1 Z Z T12 T11 T10 T9 T8 T7 T6 T5 T4 T3 T2 T1 T0 1 0/1(1) 0 CS ... SCK SO/I NOTE: (1) 0 indicates TLOW register, 1 indicates THIGH register. FIGURE 3. READ followed by WRITE COMMAND to TLOW/THIGH Register. CS CS 16-Bit READ SO/I SCK 16-Bit WRITE/ Embedded Address ... SO/I (Continued) ...
PAGE 7
READ ADDRESS REGISTER Figure 7 shows the internal register structure of the TMP122/TMP124. Table III describes the addresses of the registers available. The READ address register uses the two bits to identify which of the data registers should respond to a read command. Following a complete 16-bit read, the READ address register is reset to the default power-up state of P1/P0 equal 0/0.
PAGE 8
THERMOSTAT MODE (TM1/TM0) HIGH AND LOW LIMIT REGISTERS The Thermostat Mode bits of the TMP122/TMP124 indicate to the device whether to operate in Comparator Mode, Interrupt Mode or Interrupt Comparator Mode. For more information on Comparator and Interrupt Mode, see text HIGH and LOW limit registers. The bit assignments for thermostat mode are described in Table VII. Power on default is comparator mode.
PAGE 9
CONVERTER RESOLUTION (R1/R0) The Converter Resolution Bits control the resolution of the internal Analog-to-Digital (A/D) converter. This allows the user to maximize efficiency by programming for higher resolution or faster conversion time. Table XI identifies the Resolution Bits and the relationship between resolution and conversion time. The TMP122/TMP124 have a default resolution of 12 bits. R1 R0 RESOLUTION CONVERSION TIME (typical) 0 0 1 1 0 1 0 1 9 Bits (0.5°C) plus sign 10 Bits (0.
PAGE 10
SCK t5 t1 t3 CS t6 SO/I FIGURE 10. Output Data Timing Diagram. SCK SCK CS CS SO/I SO/I t7 t7 FIGURE 11. High Impedance Output Timing Diagram. SCK SCK t2 t2 t4 t4 CS CS SO/I SO/I FIGURE 12. Input Data Timing Diagram. 10 TMP122, TMP124 www.ti.
PAGE 11
PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 10-Jun-2014 (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line.
PAGE 13
PACKAGE MATERIALS INFORMATION www.ti.com 8-Jul-2011 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) TMP122AIDBVR SOT-23 DBV 6 3000 178.0 9.0 TMP122AIDBVT SOT-23 DBV 6 250 178.0 9.0 Pack Materials-Page 1 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3.23 3.17 1.37 4.0 8.0 Q3 3.23 3.17 1.37 4.0 8.
PAGE 14
PACKAGE MATERIALS INFORMATION www.ti.com 8-Jul-2011 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TMP122AIDBVR SOT-23 DBV 6 3000 180.0 180.0 18.0 TMP122AIDBVT SOT-23 DBV 6 250 180.0 180.0 18.
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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.