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TMP451 数据表(PDF) 4 Page - Texas Instruments |
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TMP451 数据表(HTML) 4 Page - Texas Instruments |
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4 / 34 page  TMP451-Q1 SLOS877 – OCTOBER 2014 www.ti.com 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) MIN NOM MAX UNIT Supply voltage 1.7 3.3 3.6 V TA Operating free-air temperature –40 125 °C 6.4 Thermal Information DQF THERMAL METRIC UNIT 8 PINS RθJA Junction-to-ambient thermal resistance 171.3 RθJC(top) Junction-to-case (top) thermal resistance 81.4 RθJB Junction-to-board thermal resistance 137.9 °C/W ψJT Junction-to-top characterization parameter 3.9 ψJB Junction-to-board characterization parameter 140 6.5 Electrical Characteristics At TA = –40°C to 125°C and V+ = 3.3 V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNIT TEMPERATURE ERROR TA = 0°C to 70°C ±0.25 ±1 °C TELOCAL Local temperature sensor TA = –40°C to 125°C ±1 ±2 °C TA = 0°C to 70°C, TD = –55°C to 150°C ±0.25 ±1 °C TEREMOTE Remote temperature sensor(1) TA = –40°C to 100°C, TD = –55°C to 150°C ±1 ±2 °C TA = –40°C to 125°C, TD = –55°C to 150°C ±2 ±4 °C Remote temperature sensor versus supply V+ = 1.7 V to 3.6 V ±0.1 ±0.25 °C/V (local or remote) TEMPERATURE MEASUREMENT Conversion time One-Shot mode, local and remote total 31 34 ms Local temperature sensor resolution 12 Bits Remote temperature sensor resolution 12 Bits Remote sensor source current, high Series resistance 1 k Ω max 120 μA Remote sensor source current, medium 45 μA Remote sensor source current, low 7.5 μA η Remote transistor ideality factor TMP451-Q1 optimized ideality factor 1.008 SMBus INTERFACE VIH High-level input voltage 1.4 V VIL Low-level input voltage 0.45 V Hysteresis 200 mV SMBus output low sink current 6 mA VOL Low-level output voltage IO = 6 mA 0.15 0.4 V Logic input current 0 V ≤ VI ≤ 3.6 V –1 1 μA SMBus input capacitance 3 pF SMBus clock frequency 0.01 2.5 MHz SMBus timeout 20 25 30 ms SCL falling edge to SDA valid time 1 μs DIGITAL OUTPUTS ( THERM, ALERT/THERM2 ) VOL Low-level output voltage IO = 6 mA 0.15 0.4 V IOH High-level output leakage current VO = V+ 1 μA (1) Tested with less than 5- Ω effective series resistance and 100-pF differential input capacitance. 4 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Product Folder Links: TMP451-Q1 |
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