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TMP20AIDCKR 데이터시트(PDF) 8 Page - Texas Instruments |
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TMP20AIDCKR 데이터시트(HTML) 8 Page - Texas Instruments |
8 / 18 page R (1) 1nF TMP20 MSP430 C (1) TMP20 MSP430 Vset Vref VCC VCC VCC - + Vout Vtemp Vtrip R110k TEMP V2 5 GND T GND VOUT V+ 2 4 5 TMP20 + - + REF U1 TLV3021 Analog Temperature Switch V trip 80C = Input voltage(V) 25.00 35.00 45.00 55.00 65.00 75.00 85.00 95.00 1 .00 05 1 .00 15 1 .00 25 0.00 1.25 2.50 3.75 5.00 TripPoin 80C t = TMP20 SBOS466 – DECEMBER 2009 www.ti.com OUTPUT DRIVE and CAPACITIVE LOADS TINA-TI (FREE DOWNLOAD SOFTWARE) When used in noisy environments, adding a capacitor from the output to ground with a series resistor filters Using TINA-TI SPICE-Based Analog Simulation the TMP20 output; this configuration is illustrated in Program with the TMP20 Figure 11. The TMP20 can directly drive up to 1nF of TINA is a simple, powerful, and easy-to-use circuit load capacitance while sourcing and sinking 600 μA. simulation program based on a SPICE engine. Under this condition, capacitive loads in the range of TINA-TI is a free, fully functional version of the TINA 1nF to 10 μF require a 150Ω series output resistor to software, preloaded with a library of macromodels in achieve a stable temperature measurement. The addition to a range of both passive and active output impedance of the TMP20 is 10 Ω (typical) models. It provides all the conventional dc, transient, when sinking current and less than 1 Ω when sourcing and frequency domain analysis of SPICE as well as current, as shown in Figure 1. additional design capabilities. Available as a free download from the Analog eLab Design Center, TINA-TI offers extensive post-processing capability that allows users to format results in a variety of ways. Virtual instruments offer users the ability to select input waveforms and probe circuit nodes, voltages, and waveforms, creating a dynamic quick-start tool. Figure 12 and Figure 13 show example TINA-TI circuits for the TMP20 that can be used to develop, modify, and assess the circuit design for specific applications. Links to download these simulation files are given below. NOTE: These files require that either the TINA (1) A series resistor, R, may be required depending upon the software (from DesignSoft) or TINA-TI software be amount of capacitance, C, and the amount of source/sink current installed. Download the free TINA-TI software from drawn from the output of the TMP20. the TINA-TI folder. Figure 11. TMP20 Output Filtering Note: The TMP20 TINA model is preliminary only. Figure 12. Analog Temperature Switch To download a compressed file that contains the TINA-TI simulation file for this circuit, click the following link: Analog Temperature Switch. 8 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): TMP20 |
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