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TMP101NA250G4 Scheda tecnica(PDF) 5 Page - Texas Instruments |
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TMP101NA250G4 Scheda tecnica(HTML) 5 Page - Texas Instruments |
5 / 19 page TMP100 TMP101 SBOS231G − JANUARY 2002 − REVISED NOVEMBER 2007 www.ti.com 5 APPLICATIONS INFORMATION The TMP100 and TMP101 are digital temperature sensors optimal for thermal management and thermal protection applications. The TMP100 and TMP101 are I2C and SMBus interface-compatible and are specified over a temperature range of −55 °C to +125°C. The TMP100 and TMP101 require 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 and Figure 2. TMP101 0.1 µF V+ GND 2 5 3 4 ADD0 (Input) ALERT (Output) 1 6 SCL SDA To I2C Controller NOTE: (1) SCL, SDA and ALERT require pull−up resistors for I2C bus applications. Figure 1. Typical Connections of the TMP101 TMP100 0.1 µF V+ GND 2 5 3 4 ADD0 (Input) ADD1 (Input) 1 6 SCL SDA To I2C Controller NOTE: (1) SCL and SDA require pull−up resistors for I2C bus applications. Figure 2. Typical Connections of the TMP100 The die flag of the lead frame is connected to pin 2. The sensing device of the TMP100 and TMP101 is the chip itself. Thermal paths run through the package leads as well as the plastic package. The lower thermal resistance of metal causes the leads to provide the primary thermal path. The GND pin of the TMP100 or TMP101 is directly connected to the metal lead frame, and is the best choice for thermal input. To maintain the accuracy in applications requiring air or surface temperature measurement, care should be taken to isolate the package and leads from ambient air temperature. A thermally-conductive adhesive will assist in achieving accurate surface temperature measurement. POINTER REGISTER Figure 3 shows the internal register structure of the TMP100 and TMP101. The 8-bit Pointer Register of the TMP100 and TMP101 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 TMP100 and TMP101. Power-up Reset value of P1/P0 is 00. I/O Control Interface SCL SDA Temperature Register Configuration Register T LOW Register T HIGH Register Pointer Register Figure 3. Internal Register Structure of the TMP100 and TMP101 Table 1. Pointer Register Type P7 P6 P5 P4 P3 P2 P1 P0 0 0 0 0 0 0 Register Bits Table 2. Pointer Addresses of the TMP100 and TMP101 Registers 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) TEMPERATURE REGISTER The Temperature Register of the TMP100 or TMP101 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. The first 12 bits are used to indicate temperature with all remaining bits |
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