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LM76 データシート(PDF) 4 Page - Texas Instruments |
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LM76 データシート(HTML) 4 Page - Texas Instruments |
4 / 22 page LM76 SNIS109E – JANUARY 2000 – REVISED MARCH 2013 www.ti.com Temperature-to-Digital Converter Characteristics Unless otherwise noted, these specifications apply for +VS = +5.0 Vdc ±10% for the LM76CHM-5. (1). Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = +25°C, unless otherwise noted. Typical(2) LM76CNM-3 LM76CHM-5 Units Parameter Conditions Limits(3) Limits(3) (Limit) TA = +70°C to +100°C ±1.0 TA = −20°C to +85°C for ±1.5 LM76CHM-5 Accuracy(1) TA = −10°C to +45°C ±1.0 TA = +25°C ±0.5 13 Bits Resolution See(4) 0.0625 °C Temperature Conversion Time See(5) 400 500 1000 ms I2C Inactive 0.25 mA I2C Active 0.25 0.5 0.45 mA (max) Shutdown Mode: 5 µA Quiescent Current 12 18 µA (max) TA = +85°C 8 µA (max) TA = +25°C 12 µA (max) THYST Default Temperature See(6)(7) 2 °C TLOW Default Temperature See(7) 10 °C THIGH Default Temperature See(7) 64 °C TCRIT Default Temperature See(7) 80 °C (1) The LM76 will operate properly over the +VS supply voltage range of 3V to 5.5V for the LM76CNM-3 and the LM76CHM-5. The LM76CNM-3 is tested and specified for rated accuracy at the nominal supply voltage of 3.3V. Accuracy of the LM76CNM-3 will degrade 0.2°C for a ±1% variation in +VS from the nominal value. The LM76CHM-5 is tested and specified for a rated accuracy at the nominal supply voltage of 5.0V. Accuracy of the LM76CHM-5 will degrade 0.08°C for a ±1% variation in +VS from the nominal value. (2) Typicals are at TA = 25°C and represent most likely parametric norm. (3) Limits are ensured to AOQL (Average Outgoing Quality Level). (4) 12 bits + sign, two's complement (5) This specification is provided only to indicate how often temperature data is updated. The LM76 can be read at any time without regard to conversion state (and will yield last conversion result). If a conversion is in process it will be interrupted and restarted after the end of the read. (6) Hysteresis value adds to the TLOW setpoint value (e.g.: if TLOW setpoint = 10°C, and hysteresis = 2°C, then actual hysteresis point is 10+2 = 12°C); and subtracts from the THIGH and T_CRIT setpoints (e.g.: if THIGH setpoint = 64°C, and hysteresis = 2°C, then actual hysteresis point is 64 −2 = 62°C). For a detailed discussion of the function of hysteresis refer to TEMPERATURE COMPARISON, and Figure 6. (7) Default values set at power up. 4 Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LM76 |
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