Digital Temperature Sensor

www.DataSheet4U.com TMP105 Chip-Scale Package SLLS648B − FEBRUARY 2005 − REVISED JANUARY 2006 Digital Temperature Sensor with Two-Wire Interface FEATURES D D D D D D D SUPPORTS 1.8V I2C BUS TWO ADDRESSES DIGITAL OUTPUT: Two-Wire Serial Interface RESOLUTION: 9- to 12-Bits, User-Selectable ACCURACY: ±2.0°C (max) from −25°C to +85°C ±3.0°C (max) from −40°C to +125°C LOW QUIESCENT CURRENT: 50µA, 1.5µA Standby NO POWER-UP SEQUENCE REQUIRED, I2C PULLUPS CAN BE ENABLED PRIOR TO V+ DESCRIPTION The TMP105 is a two-wire, serial output temperature sensor available in a WCSP package. Requiring no external components, the TMP105 is capable of reading temperatures with a resolution of 0.0625°C. The TMP105 features a Two-Wire interface that is SMBus-compatible, with the TMP105 allowing up to two devices on one bus. The TMP105 features an SMBus Alert function. The TMP105 is ideal for extended temperature measurement in a variety of communication, computer, consumer, environmental, industrial, and instrumentation applications. The TMP105 is specified for operation over a temperature range of −40°C to +125°C. APPLICATIONS D CELL PHONES D COMPUTER PERIPHERAL THERMAL D D D D PROTECTION NOTEBOOK COMPUTERS BATTERY MANAGEMENT THERMOSTAT CONTROLS ENVIRONMENTAL MONITORING AND HVAC YZC LEAD FREE 2 X 3 ARRAY (TOP VIEW) Temperature A1 Diode Temp. Sensor Control Logic A2 SDA GND SDA 1,65 mm 1,50 mm A1 B1 C1 A2 B2 C2 GND ALERT A0 V+ C1 OSC Config. and Temp. Register C2 A0 SCL B1 ∆Σ A/D Converter Serial Interface B2 ALERT SCL V+ 1,15 mm 1,00 mm (Bump Side Down) Note: Pin A1 is marked with a ’0” for Pb−free (YZC) TMP105 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  2005−2006, Texas Instruments Incorporated www.ti.com TMP105 www.ti.com SLLS648B − FEBRUARY 2005 − REVISED JANUARY 2006 ABSOLUTE MAXIMUM RATINGS(1) Power Supply, V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0V Input Voltage(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5V to 7.0V Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA Operating Temperature Range . . . . . . . . . . . . . . . −55°C to +127°C Storage Temperature Range . . . . . . . . . . . . . . . . . −60°C to +130°C Junction Temperature (TJ max) . . . . . . . . . . . . . . . . . . . . . . +150°C ESD Rating: Human Body Model (HBM)(3) . . . . . . . . . . . . . . . . . . . . . 2000V Charged-Device Model (CDM)(4) . . . . . . . . . . . . . . . . . . . . 500V Machine Model (MM)(5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200V (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 TMP105 input voltages. (3) HBM testing has been tested to TI specifications JEDEC JESD22-A114C.01. (4) CDM testing has been tested to TI specifications JEDEC EIA/JESD22-A115A. (5) MM testing has been tested to TI specifications JEDEC JESD22-C101C. 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) PACKAGE Wafer chip-scale package (YZC) PART NUMBER TMP105YZC SYMBOL EY (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. PIN ASSIGNMENTS WCSP-6 PACKAGE (TOP VIEW) SDA SCL V+ A1 B1 A2 B2 C2 GND ALERT A0 C1 (Bump Side Down) NOTE: Pin 1 is determined by orienting the package marking as indicated in the diagram. 2 TMP105 www.ti.com SLLS648B − FEBRUARY 2005 − REVISED JANUARY 2006 ELECTRICAL CHARACTERISTICS At TA = −40°C to +125°C, and V+ = 2.6V to 3.3V, unless otherwise noted. TMP105 PARAMETER TEMPERATURE INPUT Range Accuracy (Temperature Error) vs Supply Resolution(1) DIGITAL INPUT/OUTPUT Input Capacitance Input Logic Levels: VIH VIL Leakage Input Current, IIN Input Voltage Hysteresis Output Logic Levels: VOL SDA VOL ALERT Resolution Conversion Time IOL = 3mA IOL = 4mA Selectable 9-Bit 10-Bit 11-Bit 12-Bit Timeout Time POWER SUPPLY Operating Range Quiescent Current Shutdown Current TEMPERATURE RANGE Specified Range Operating Range Thermal Resistance (1) Specified for 12-bit resolution. qJA −40 −55 240 +125 +127 °C °C °C/W IQ ISD Serial Bus Inactive Serial Bus Active, SCL Freq = 400kHz Serial Bus Inactive Serial Bus Active, SCL Freq = 400kHz 2.6 50 100 1.5 60 3 3.3 85 V µA µA µA µA 25 0 0 0.15 0.15 9 to 12 27.5 55 110 220 54 37.5 75 150 300 74 0.4 0.4 V V Bits ms ms ms ms ms 0V ≤ VIN ≤ 6V SCL and SDA Pins 100 1.2 −0.5 6.0 0.6 1 V V µA mV 3 pF −25°C to +85°C −40°C to +125°C Selectable −40 ±0.5 ±1.0 0.2 0.0625 +125 ±2.0 ±3.0 ±0.5 °C °C °C °C/V °C CONDITION MIN TYP MAX UNITS 3 TMP105 www.ti.com SLLS648B − FEBRUARY 2005 − REVISED JANUARY 2006 TYPICAL CHARACTERISTICS At TA = +25°C and V+ = 2.8V, unless otherwise noted. QUIESCENT CURRENT vs TEMPERATURE 100 V+ = 2.6V Shutdown Current (µA) 80 2.5 2.0 3.0 SHUTDOWN CURRENT vs TEMPERATURE IQ (µA) 60 V+ = 3.3V 1.5 1.0 0.5 V+ = 2.6V 0 40 20 0 −50 −25 0 25 50 75 100 125 Temperature (_ C) −50 −25 0 25 50 75 100 125 Temperature (_C) CONVERSION TIME vs TEMPERATURE 225 2.0 1.5 Temperature Error (_ C) 220 Conversion Time (ms) V+ = 2.6V 215 1.0 0.5 0.0 −0.5 −1.0 −1.5 12−Bit Resolution 200 −50 −25 0 25 50 75 100 125 Temperature (_C) −2.0 −55 TEMPERATURE ACCURACY vs TEMPERATURE 210 V+ = 3.3V 205 3 typical units 12−bit resolution. −35 −15 5 25 45 65 85 105 125 130 Temperature (_ C) QUIESCENT CURRENT WITH BUS ACTIVITY vs TEMPERATURE 500 450 400 350 IQ (µA) 300 250 200 150 100 50 0 1k 10k 100k Frequency (Hz) +25_C −55_C 1M 10M +125_ C 4 TMP105 www.ti.com SLLS648B − FEBRUARY 2005 − REVISED JANUARY 2006 APPLICATIONS INFORMATION The TMP105 is a digital temperature sensor that is optimal for thermal management and thermal protection applications. The TMP105 is Two-Wire and SMBus interface-compatible, and is specified over a temperature range of −40°C to +125°C. The TMP105 requires no external components for operation except for pull-up resistors on SCL, SDA, and ALERT, although a 0.1µF bypass capacitor is recommended, as shown in Figure 1. Pointer Register Temperature Register Configuration Register SCL I/O Control Interface SDA TLOW Register V+ THIGH Register 0.1µF C1 To Two−Wire Controller SCL SDA B1 TMP105 A1 A2 C2 B2 A0 ALERT (Output) Figure 2. Internal Register Structure of the TMP105 P1 P0 0 1 0 1 REGISTER Temperature Register (Read Only) Configuration Register (Read/Write) TLOW Register (Read/Write) THIGH Register (Read/Write) GND NOTE: SCL, SDA, and ALERT pins require pull−up resistors. 0 0 1 1 Figure 1. Typical Connections of the TMP105 The sensing device of the TMP105 is the chip itself. Thermal paths run through the package leads. The lower thermal resistance of metal causes the leads to provide the primary thermal path. 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. Table 2. Pointer Addresses of the TMP105 TEMPERATURE REGISTER The Temperature Register of the TMP105 is a 12-bit, read-only register that stores the output of the most recent conversion. Two bytes must be read to obtain data, and are described in Table 3 and Table 4. Note that byte 1 is the most significant byte; byte 2 is the least significant byte (sent in this order). The first 12 bits are used to indicate temperature, with all remaining bits equal to zero. The least significant byte does not have to be read if that information is not needed. Data format for temperature is summarized in Table 5. Following power-up or reset, the Temperature Register will read 0°C until the first conversion is complete. POINTER REGISTER Figure 2 shows the internal register structure of the TMP105. The 8-bit Pointer Register of the devices is used to address a given data register. The Pointer Register uses the two LSBs to identify which of the data registers should respond to a read or write command. Table 1 identifies the bits of the Pointer Register byte. Table 2 describes the pointer address of the registers available in the TMP105. Power-up reset value of P1/P0 is 00. D7 T11 D6 T10 D5 T9 D4 T8 D3 T7 D2 T6 D1 T5 D0 T4 Table 3. Byte 1 of Temperature Register D7 T3 D6 T2 D5 T1 D4 T0 D3 0 D2 0 D1 0 D0 0 P7 0 P6 0 P5 0 P4 0 P3 0 P2 0 P1 P0 Register Bits Table 1. Pointer Register Byte Table 4. Byte 2 of Temperature Register 5 TMP105 www.ti.com SLLS648B − FEBRUARY 2005 − REVISED JANUARY 2006 TEMPERATURE (°C) 128 127.9375 100 80 75 50 25 0.25 0 −0.25 −25 −55 DIGITAL OUTPUT (BINARY) 0111 1111 1111 0111 1111 1111 0110 0100 0000 0101 0000 0000 0100 1011 0000 0011 0010 0000 0001 1001 0000 0000 0000 0100 000