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TMP106YZC Folha de dados(PDF) 5 Page - Burr-Brown (TI) |
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TMP106YZC Folha de dados(HTML) 5 Page - Burr-Brown (TI) |
5 / 16 page TMP106 SLLS672A − OCTOBER 2005 − REVISED JANUARY 2006 www.ti.com 5 APPLICATIONS INFORMATION The TMP106 is a digital temperature sensor that is optimal for thermal management and thermal protection applications. The TMP106 is Two-Wire and SMBus interface-compatible, and is specified over a temperature range of −40 °C to +125°C. The TMP106 requires no external components for operation except for pull-up resistors on SCL, SDA, and ALERT, although a 0.1 µF bypass capacitor is recommended, as shown in Figure 1. TMP106 0.1 µF V+ GND A2 B2 C2 C1 ALERT (Output) A0 B1 A1 SCL SDA To Two−Wire Controller NOTE:SCL,SDA,and ALERT pins require pull−up resistors. Figure 1. Typical Connections of the TMP106 The sensing device of the TMP106 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 TMP106. The 8-bit Pointer Register of the device 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 TMP106. Power-up reset value of P1/P0 is 00. P7 P6 P5 P4 P3 P2 P1 P0 0 0 0 0 0 0 Register Bits Table 1. Pointer Register Byte I/O Control Interface SCL SDA Temperature Register Configuration Register T LOW Register T HIGH Register Pointer Register Figure 2. Internal Register Structure of the TMP106 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 TMP106 TEMPERATURE REGISTER The Temperature Register of the TMP106 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. 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 D7 D6 D5 D4 D3 D2 D1 D0 T3 T2 T1 T0 0 0 0 0 Table 4. Byte 2 of Temperature Register |
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