TMP121 TMP123 SBOS273C − JUNE 2003 − REVISED FEBRUARY 2005 1.5°C Accurate Digital Temperature Sensor with SPI Interface FEATURES D DIGITAL OUTPUT: SPI-Compatible Interface D RESOLUTION: 12-Bit + Sign, 0.0625°C D ACCURACY: ±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 D D D D OPERATION TO 150°C D POWER-SUPPLY TEMPERATURE D D D D D NOTEBOOK COMPUTERS CELL PHONES BATTERY MANAGEMENT OFFICE MACHINES 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 MONITORING COMPUTER PERIPHERAL THERMAL PROTECTION DESCRIPTION Temperature Temperature NC 1 Diode Temp. Sensor Control Logic 6 SO GND 1 Diode Temp. Sensor Control Logic 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. Copyright 2003−2005, Texas Instruments Incorporated ! ! www.ti.com "#$# "#$% 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. (2) Input voltage rating applies to all TMP121 and TMP123 input 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. voltages. ORDERING INFORMATION(1) PRODUCT PACKAGE-LEAD PACKAGE DESIGNATOR SOT23-6 DBV TMP121 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 SOT23-6 TMP121(1) GND 2 V+ 3 6 SO GND 1 5 CS NC 2 4 SCK V+ 3 SOT23−6 NC = No Connection(2) 2 6 SO 5 CS 4 SCK 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. T123 1 T121 NC TMP123(1) "#$# "#$% 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 CONDITIONS MIN TYP MAX UNIT TEMPERATURE INPUT +125 °C −25°C to +85°C ±0.5 ±1.5 °C −40°C to +125°C ±1.0 ±2.0 °C −40°C to +150°C ±1.5 +0.3 °C/V Range −40 Accuracy (temperature error) vs Supply −0.3 0.1 °C ±0.0625 Resolution °C DIGITAL INPUT/OUTPUT Input Logic Levels: VIH VIL Input Current, SO, SCK, CS 0.7(V+) IIN V 0V ≤ VIN ≤ V+ 0.3(V+) V ±1 µA 0.4 V Output Logic Levels: VOL SO VOH SO ISINK = 3mA ISOURCE = 2mA (V+)−0.4 V Resolution 12 Input Capacitance, SO, SCK, CS 2.5 Bits pF Conversion Time 12-Bit 240 320 ms Conversion Period(1) 12-Bit 480 640 ms POWER SUPPLY Operating Range Quiescent Current Shutdown Current (TMP121) Shutdown Current (TMP123) 5.5 V IQ Serial Bus Inactive 2.7 35 50 µA ISD ISD Serial Bus Inactive 0.1 1 µA Serial Bus Inactive 0.1 3 µA TEMPERATURE RANGE Specified Range −40 +125 °C Operating Range −55 +150 °C Storage Range −60 +150 Thermal Resistance qJA SOT23-6 Surface-Mount 200 °C °C/W (1) Period indicates time between conversion starts. 3 "#$# "#$% www.ti.com SBOS273C − JUNE 2003 − REVISED FEBRUARY 2005 TYPICAL CHARACTERISTICS At TA = +25°C and V+ = 5.0V, unless otherwise noted. SHUTDOWN CURRENT vs TEMPERATURE QUIESCENT CURRENT vs TEMPERATURE 1.0 50 0.9 V+ = 5V 0.8 40 0.7 30 V+ = 2.7V ISD (µA) IQ (µA) 0.6 0.5 0.4 0.3 0.2 20 0.1 0.0 Serial Bus Inactive −0.1 −60 −40 −20 10 −60 −40 −20 0 20 40 60 80 100 120 140 0 20 40 60 80 100 120 140 Temperature (_ C) Temperature (_ C) CONVERSION TIME vs TEMPERATURE TEMPERATURE ACCURACY vs TEMPERATURE 400 2.0 300 Temperature Error (_C) Conversion Time (ms) 1.5 V+ = 5V 200 V+ = 2.7V 1.0 0.5 0.0 −0.5 −1.0 −1.5 12−Bit Resolution 100 −60 −40 −20 0 20 40 60 Temperature (_ C) 4 80 100 120 140 3 Typical Units 12−Bit Resolution −2.0 −60 −40 −20 0 20 40 60 80 100 120 140 160 Temperature (_ C) "#$# "#$% www.ti.com SBOS273C − JUNE 2003 − REVISED FEBRUARY 2005 APPLICATIONS INFORMATION The TMP121 and TMP123 are 12-bit plus sign read-only digital temperature sensors optimal for thermal management and thermal protection applications. The TMP121 and the TMP123 communicate through a serial interface that is SPI-compatible. Temperature is converted to a 12-bit plus sign data word with 0.0625°C resolution. The TMP121 and TMP123 are specified for a temperature range of −40°C to +125°C, with operation extending from −55°C to +150°C. The TMP121 and TMP123 are optimal for low power applications, with a 0.5s conversion period for reduced power consumption. The TMP121 and TMP123 are specified for a supply voltage range of 2.7V to 5.5V, and also feature a hardware shutdown to provide additional power savings. The TMP121 and TMP123 require no external components for operation, though a 0.1µF supply bypass capacitor is recommended. Figure 1 shows typical connections for the TMP121 and TMP123. V+ V+ 0.1µF 0.1µF 3 SCK 4 SO 6 3 1 NC(1) TMP121 5 SCK 4 SO 6 2 5 D15 D14 D13 D12 D11 D10 D9 D8 T12 T11 T10 T9 T8 T7 T6 T5 D7 D6 D5 D4 D3 D2 D1 D0 T4 T3 T2 T1 T0 0 Z Z Table 1. Temperature Register TEMPERATURE (°C) DIGITAL OUTPUT(1) (BINARY) HEX 150 0100 1011 0000 0000 4B00 125 0011 1110 1000 0000 3E80 25 0000 1100 1000 0000 0C80 0.0625 0000 0000 0000 1000 0008 0 0000 0000 0000 0000 0000 −0.0625 1111 1111 1111 1000 FFF8 −25 1111 0011 1000 0000 F380 −55 1110 0100 1000 0000 E480 CS 1 NC = No Connection GND The Temperature Register of the TMP121 and TMP123 is a 16-bit, signed read-only register that stores the output of the most recent conversion. Up to 16 bits can be read to obtain data and are described in Table 1. The first 13 bits are used to indicate temperature with bits D2 = 0, and D1, D0 in a high impedance state. Data format for temperature is summarized in Table 2. Following power-up or reset, the Temperature Register will read 0°C until the first conversion is complete. (1) The last two bits are high impedance and are shown as 00 in the table. TMP123 CS 2 NC(1) TEMPERATURE REGISTER Table 2. Temperature Data Format COMMUNICATING WITH THE TMP121 GND NOTE: (1) Pins labeled NC should be left floating or connected to GND. Figure 1. Typical Connections of the TMP121 and TMP123 The sensing device of both the TMP121 and TMP123 is the chip itself; the die flag of the lead frame is thermally connected to pin 2 of the TMP121, and of the TMP123. Thermal paths run through the package leads as well as the plastic package, and the lower thermal resistance of metal causes the leads to provide the primary thermal path. The GND pin (pin 2) of the TMP121 and the NC pin (pin 2) of the TMP123 are thermally connected to the metal lead frame, and are the best choice for thermal input. To maintain accuracy in applications requiring air or surface temperature measurement, care should be taken to isolate the package and leads from ambient air temperature. The TMP121 and TMP123 continuously convert temperatures to digital data while CS is high. CS must be high for a minimum of one conversion time (320ms max) to update the temperature data. Reading temperature data from the TMP121 and TMP123 is initiated by pulling CS low, which will cause any conversion in progress to terminate, and place the device into analog shutdown. Quiescent current is reduced to 1µA during analog shutdown. Once CS is pulled low, temperature data from the last completed conversion prior to dropping CS is latched into the shift register and clocked out at SO on the falling SCK edge. The 16-bit data word is clocked out sign bit first, followed by the MSB. Any portion of the 16-bit word can be read before raising CS. The TMP121 and TMP123 typically require 0.25s to complete a conversion and consume 50µA of current during this period. If CS is held high for longer than one conversion time period the TMP121 and TMP123 will go into idle mode for 0.25s, requiring only 20µA of current. A new conversion begins every 0.5s. Figure 2 describes the conversion timing for the TMP121 and TMP123. 5 "#$# "#$% www.ti.com SBOS273C − JUNE 2003 − REVISED FEBRUARY 2005 Timing Diagrams 0.5s 0.25s The TMP121 and TMP123 are SPI-compatible. Figure 4 and Figure 5 describe the various timing requirements, with parameters defined in Table 3. 50µA (active) 20µA (idle) PARAMETER Figure 2. Conversion Time and Period MIN SCK Period t1 t2 100 40 CS to Output Data Delay t3 t4 CS Rising Edge to Output High Impedance t5 SCK Falling Edge to Output Data Delay The serial data of the TMP121 and TMP123 consists of 12-bit plus sign temperature data followed by a confirmation bit and two high impedance bits. Data is transmitted in Binary Two’s Complement format. Figure 3 describes the output data of the TMP121 and TMP123. CS to Rising Edge SCK Set-Up Time D15 D14 D13 D12 D11 D10 D9 Table 3. Timing Description D8 D7 D6 D5 D4 D3 1 Z Z Figure 3. Data READ SCK t3 t1 t2 CS t4 SO Figure 4. Output Data Timing Diagram SCK SCK CS CS t5 t5 SO SO Figure 5. High Impedance Output Timing Diagram 6 ns ns SCK Z UNITS ns 30 CS SO/I MAX 30 ns 30 ns PACKAGE OPTION ADDENDUM www.ti.com 30-Mar-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty TMP121AIDBVR ACTIVE SOT-23 DBV 6 3000 TBD CU NIPDAU Level-1-235C-UNLIM TMP121AIDBVT ACTIVE SOT-23 DBV 6 250 TBD CU NIPDAU Level-1-235C-UNLIM TMP123AIDBVR ACTIVE SOT-23 DBV 6 3000 TBD CU NIPDAU Level-1-240C-UNLIM TMP123AIDBVT ACTIVE SOT-23 DBV 6 250 TBD CU NIPDAU Level-1-240C-UNLIM Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. 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