Document
TMP121 TMP123
SBOS273C − JUNE 2003 − REVISED FEBRUARY 2005
1.5°C Accurate Digital Temperature Sensor with SPI Interface
D DIGITAL OUTPUT: SPI-Compatible Interface D RESOLUTION: 12-Bit + Sign, 0.0625°C www.DataSheet4U.com D ACCURACY: D D D D OPERATION TO 150°C
±1.5°C from −25°C to +85°C (max) LOW QUIESCENT CURRENT: 50µA (max) WIDE SUPPLY RANGE: 2.7V to 5.5V TINY SOT23-6 PACKAGE
FEATURES
DESCRIPTION
The TMP121 and TMP123 are SPI-compatible temperature sensors available in the tiny SOT23-6 package. Requiring no external components, the TMP121 and TMP123 are capable of measuring temperatures within 2°C of accuracy over a temperature range of −40°C to +125°C. Low supply current, and a supply range from 2.7V to 5.5V, make the TMP121 and TMP123 excellent candidates for low-power applications. The TMP121 and TMP123 are ideal for extended thermal measurement in a variety of communication, computer, consumer, environmental, industrial, and instrumentation applications.
APPLICATIONS
D D D D D
D POWER-SUPPLY TEMPERATURE
MONITORING COMPUTER PERIPHERAL THERMAL PROTECTION NOTEBOOK COMPUTERS CELL PHONES BATTERY MANAGEMENT OFFICE MACHINES
Temperature Diode Temp. Sensor Control Logic
Temperature Diode Temp. Sensor Control Logic
NC
1
6
SO
GND
1
6
SO
GND
2
∆Σ A/D Converter
Serial Interface
5
CS
NC
2
∆Σ A/D Converter
Serial Interface
5
CS
V+
3
OSC
Config. and Temp. Register
4
SCK
V+
3
OSC
Config. and Temp. Register
4
SCK
TMP121
TMP123
NC = No Connection(1)
NC = No Connection(1)
(1) Pins labeled NC should be left floating or connected to GND. 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. All 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 Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 2003−2005, Texas Instruments Incorporated
www.ti.com
TMP121 TMP123
www.ti.com SBOS273C − JUNE 2003 − REVISED FEBRUARY 2005
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 . . . . . . . . . . . . . . . . . −60°C to +150°C Junction Temperature (TJ max) . . . . . . . . . . . . . . . . . . . . . . +150°C Lead Temperature (soldering) . . . . . . . . . . . . . . . . . . . . . . . . +300°C (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not supported. www.DataSheet4U.com (2) Input voltage rating applies to all TMP121 and TMP123 input voltages.
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. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
ORDERING INFORMATION(1)
PRODUCT TMP121 PACKAGE-LEAD SOT23-6 PACKAGE DESIGNATOR DBV PACKAGE MARKING T121
TMP123 T123 (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com.
PIN CONFIGURATIONS
Top View
TMP121(1) TMP123(1)
SOT23-6
T121
T123
NC GND V+
1 2 3
6 5 4
SO CS SCK
GND NC V+
1 2 3
6 5 4
SO CS SCK
SOT23−6 NC = No Connection(2)
SOT23−6 NC = No Connection(2)
Pin 1 orientation is determined by package marking. (1) Pin 1 of the SOT23-6 package is determined by orienting the package marking as shown. (2) Pins labeled NC should be left floating or connected to GND.
2
TMP121 TMP123
www.ti.com SBOS273C − JUNE 2003 − REVISED FEBRUARY 2005
ELECTRICAL CHARACTERISTICS
At TA = −40°C to +125°C and V+ = 2.7V to 5.5V, unless otherwise noted. TMP121, TMP123 PARAMETER TEMPERATURE INPUT Range Accuracy (temperature error) −25°C to +85°C −40°C to +125°C −40°C to +150°C vs Supply Resolution DIGITAL INPUT/OUTPUT www.DataSheet4U.com Input Logic Levels: VIH VIL Input Current, SO, SCK, CS Output Logic Levels: VOL SO VOH SO Resolution Input Capacitance, SO, SCK, CS Conversion Time Conversion Period(1) POWER SUPPLY Operating Range Quiescen.