PDF TMP105 Data sheet ( Hoja de datos )

Número de pieza	TMP105
Descripción	Digital Temperature Sensor
Fabricantes	Burr-Brown
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No Preview Available ! www.DataSheet4U.com TMP105 Chip-Scale Package SLLS648B − FEBRUARY 2005 − REVISED JANUARY 2006 Digital Temperature Sensor with Two-Wire Interface FEATURES D SUPPORTS 1.8V I2C BUS D TWO ADDRESSES D DIGITAL OUTPUT: Two-Wire Serial Interface D RESOLUTION: 9- to 12-Bits, User-Selectable D ACCURACY: ±2.0°C (max) from −25°C to +85°C ±3.0°C (max) from −40°C to +125°C D LOW QUIESCENT CURRENT: 50µA, 1.5µA Standby D NO POWER-UP SEQUENCE REQUIRED, I2C PULLUPS CAN BE ENABLED PRIOR TO V+ APPLICATIONS D CELL PHONES D COMPUTER PERIPHERAL THERMAL PROTECTION D NOTEBOOK COMPUTERS D BATTERY MANAGEMENT D THERMOSTAT CONTROLS D ENVIRONMENTAL MONITORING AND HVAC YZC LEAD FREE 2 X 3 ARRAY (TOP VIEW) SDA 1,65 mm 1,50 mm SCL V+ A1 A2 GND B1 B2 ALERT C1 C2 A0 1,15 mm 1,00 mm (Bump Side Down) Note: Pin A1 is marked with a ’0” for Pb−free (YZC) 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. Temperature SDA A1 Diode Temp. Sensor Control Logic A2 GND SCL B1 ∆Σ A/D Converter Serial Interface B2 ALERT V+ C1 OSC Config. and Temp. Register C2 A0 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 1 page TMP105 www.ti.com 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. V+ C1 To Two−Wire Controller SCL B1 SDA A1 TMP105 C2 B2 A2 0.1µF A0 ALERT (Output) GND NOTE: SCL, SDA, and ALERT pins require pull−up resistors. 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. 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. SLLS648B − FEBRUARY 2005 − REVISED JANUARY 2006 Pointer Register Temperature Register Configuration Register TLOW Register THIGH Register I/O Control Interface SCL SDA Figure 2. Internal Register Structure of the TMP105 P1 P0 REGISTER 0 0 Temperature Register (Read Only) 0 1 Configuration Register (Read/Write) 1 0 TLOW Register (Read/Write) 1 1 THIGH Register (Read/Write) 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. D7 D6 D5 D4 D3 D2 D1 D0 T11 T10 T9 T8 T7 T6 T5 T4 Table 3. Byte 1 of Temperature Register P7 P6 P5 P4 P3 P2 P1 P0 0 0 0 0 0 0 Register Bits Table 1. Pointer Register Byte D7 D6 D5 D4 D3 D2 D1 D0 T3 T2 T1 T0 0 0 0 0 Table 4. Byte 2 of Temperature Register 5 5 Page www.ti.com TMP105 SLLS648B − FEBRUARY 2005 − REVISED JANUARY 2006 1 SCL 91 9 … SDA 1 Start By Master SCL (Continued) 1 0 0 1 0 0 A0 R/W 0 ACK By TMP105 Frame 1 Two−Wire Slave Address Byte 9 0 0 0 0 0 P1 P0 … ACK By TMP105 Frame 2 Pointer Register Byte 19 SDA (Continued) D7 D6 D5 D4 D3 D2 D1 Frame 3 Data Byte 1 D0 ACK By TMP105 D7 D6 D5 D4 D3 D2 D1 D0 ACK By TMP105 Frame 4 Data Byte 2 Stop By Master Figure 5. Two-Wire Timing Diagram for TMP105 Write Word Format SCL 1 91 9 … SDA 100 0 0 A0 R/W 0 0 0 0 0 0 P1 P0 … Start By Master Frame 1 Two−Wire Slave Address Byte ACK By TMP105 Frame 2 Pointer Register Byte ACK By TMP105 SCL (Continued) 1 91 9 … SDA (Continued) Start By Master 1 0 0 1 0 0 A0 R/W D7 D6 D5 D4 D3 D2 D1 D0 Frame 3 Two−Wire Slave Address Byte ACK By TMP105 From TMP105 Frame 4 Data Byte 1 Read Register … ACK By Master SCL (Continued) 1 9 SDA (Continued) D7 D6 D5 D4 D3 D2 D1 D0 From TMP105 ACK By Master Frame 5 Data Byte 2 Read Register Stop By Master Figure 6. Two-Wire Timing Diagram for Read Word Format 11 11 Page

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