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LM92 Datasheet(PDF) 4 Page - Texas Instruments |
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LM92 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 25 page LM92 SNIS110D – MARCH 2000 – REVISED MARCH 2013 www.ti.com Electrical Characteristics Temperature-to-Digital Converter Characteristics Unless otherwise noted, these specifications apply for +VS= +2.7V to +5.5V for LM92CIM . Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA= TJ= +25°C, unless otherwise noted. Typical(1) Limits(2) Unit Parameter Conditions (Limit) Accuracy (This is a summary. For more T A = +30°C, +VS = 3.3V to 4.0V ±0.33 detailed information please see (3)) T A = 10°C or +50°C, +VS = 3.3V to ±0.50 4.0V T A = −10 °C or +85°C, +VS = 3.3V ±1.00 °C (max) to 4.0V T A = +125°C, +VS = 4.0V ±1.25 T A = −25°C to 150°C, +VS = 4.0V ±1.50 Resolution (4) 13 Bits 0.0625 °C Linearity (5) ±0.5 °C (max) Offset Error of Transfer Function (6) +VS = 4.0V °C (max) Offset Error of Transfer Function Supply 2.7V ≤ +VS< 3.6V °C/V (max) Sensitivity 3.6V ≤ +VS≤ 5.5V °C/V (max) Temperature Conversion Time (7) 500 1000 ms Quiescent Current I2C Inactive 0.35 mA I2C Active 0.35 0.625 mA (max) Shutdown Mode 5 µA T HYST Default Temperature (8) (9)2 °C T LOW Default Temperature (9) 10 °C T HIGH Default Temperature (9) 64 °C T C Default Temperature (9) 80 °C (1) Typical values are at TA = 25 °C and represent most likely parametric norm. (2) Limits are guaranteed to TI's AOQL (Average Outgoing Quality Level). (3) The limits found in Table 1 supersede the limits shown in the Electrical Characteristics Table. The Accuracy specification includes errors due to linearity, offset and gain. The accuracy specification includes effects of self heating with negligible digital output loading. Pull-up resistors should be maximized (10k typical recommended), so that self heating due to digital output loading is negligible. (4) Limits at intermediate temperatures can be calculated using a straight line interpolation as shown in Figure 2 and Figure 3. (5) Linearity Error is defined as the worse case difference of an actual reading to that of a calculated reading derived from the straight line whose endpoints are measured at 30°C and 125°C for the range of 30°C to 125°C or whose endpoints are measured at 30°C and −25°C for the range of 30°C to −25°. (6) Offset Error calibration should be done at 30°C. The residual error of the transfer function is then equivalent to the Accuracy Limit minus the Offset Limit. This does not take into account the power supply sensitivity of the offset error. Nor, does it take into account the error introduced by the calibration system used. (7) This specification is provided only to indicate how often temperature data is updated. The LM92 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. (8) 12 bits + sign, two's complement (9) Default values set at power up. Figure 2. Accuracy vs Temperature with +Vs = 5V 4 Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LM92 |
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