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LM40 데이터시트(PDF) 5 Page - National Semiconductor (TI) |
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LM40 데이터시트(HTML) 5 Page - National Semiconductor (TI) |
5 / 27 page TEMPERATURE-TO-DIGITAL CONVERTER CHARACTERISTICS Parameter Conditions Typical (Note 7) Limits (Note 8) Units (Limits) Diode Source Current (V D+ −VD−) = +0.65 V; High Current 188 280 µA (max) Low Current 11.75 µA Diode Source Current High Current to Low Current Ratio 16 ANALOG TO DIGITAL CONVERTER CHARACTERISTICS Symbol Parameter Conditions Typical (Note 7) Limits (Note 8) Units (Limit) TUE Total Unadjusted Error(Note 11) ±2 %FS (max) Resolution 9 Bits DNL Differential Non-linearity 1 LSB Power Supply Sensitivity ±1 %/V Input Resistance, all analog inputs (total resistance of divider chain) 210 140 k Ω (min) 400 k Ω (max) SWD and ADD DIGITAL INPUT CHARACTERISTICS Symbol Parameter Conditions Typical (Note 7) Limits (Note 8) Units (Limit) V IH SWD Logical High Input Voltage 2.1 V (min) V+ + 0.5 V (max) V IL SWD Logical Low Input Voltage 0.8 V (max) -0.5 V (min) V IH ADD Logical High Input Voltage 90%xV+ V (min) V IL ADD Logical Low Input Voltage 10%xV+ V (max) V HYST Input Hysteresis 300 mV I L SWD and ADD Input Current GND ≤ V IN ≤ V+ ±0.005 ±10 µA (max) SWD Input Current with V+ Open or Grounded GND ≤ V IN ≤ 3.6V, and V+ Open or GND ±0.005 µA C IN Digital Input Capacitance 10 pF SWD DIGITAL OUTPUT CHARACTERISTICS Symbol Parameter Conditions Typical (Note 7) Limits (Note 8) Units (Limit) V OL Open-drain Output Logic “Low” Voltage I OL = 4mA 0.4 V (max) I OL = 50µA 0.2 V (max) I OH Open-drain Output Off Current ±0.005 ±10 µA (max) C OUT Digital Output Capacitance 10 pF AC Electrical Characteristics The following specification apply for V+ = +3.0 V DC to +3.6 VDC, unless otherwise specified. Boldface limits apply for T A =TJ =TMIN=0˚C to TMAX=85˚C; all other limits TA =TJ = 25˚C. The SensorPath Characteristics conform to the SensorPath specification revision 0.98. Please refer to that speciation for further details. Symbol Parameter Conditions Typical (Note 7) Limits (Note 8) Units (Limits) HARDWARE MONITOR CHARACTERISTICS t CONV Total Monitoring Cycle Time (Note 13) All Voltage and Temperature readings (Default) 182 163.8 ms (min) 200.2 ms (max) SensorPath Bus CHARACTERISTICS t f SWD fall time (Note 16) R pull-up=1.25 k Ω ±30%, C L=400 pF 300 ns (max) www.national.com 5 |
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