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ZSC31015EAG1-R 数据表(PDF) 16 Page - Renesas Technology Corp |
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ZSC31015EAG1-R 数据表(HTML) 16 Page - Renesas Technology Corp |
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16 / 53 page ![]() © 2016 Integrated Device Technology, Inc 16 November 14, 2016 ZSC31015 Datasheet ) Tco T B _ Offset Raw _ BR ( ) Tcg T 1 ( B _ Gain ZB ) ZB SOT 25 . 1 ( ZB BR )] Tco T SOT ( T B _ Offset Raw _ BR [ ) Tcg T 1 ( B _ Gain BR ] Tco T B _ Offset Raw _ BR [ )] Tcg T SOT ( T 1 [ B _ Gain BR B _ Gain / BR Raw _ BR If the SOT applies to correcting the bridge reading, then the correction formula for the bridge reading is represented as a two-step process as follows: (1) (2) Where: BR = Corrected Bridge reading that is output as digital or analog on the SIG TM pin ZB = Intermediate result in the calculations BR_Raw = Raw Bridge reading from ADC T_Raw = Raw Temp reading converted from PTAT signal or external diode Gain_B = Bridge Gain term Offset_B = Bridge Offset term Tcg = Temperature Coefficient Gain Tco = Temperature Coefficient Offset T = (T_Raw – T SETL) TSETL = T_Raw reading at which low calibration was performed (typically 25°C) SOT = Second-Order Term Note For solving equation (1) the following condition must be met: If this condition is not met, the analog Pre-Amp Gain must be set to a smaller value because a negative Offset_B is not supported. If the SOT applies to correcting the 2 nd order behavior of Tco, then the formula for bridge correction is as follows: (3) If the SOT applies to correcting the 2 nd order behavior of Tcg, then the formula for bridge correction is as follows: (4) The bandgap reference gives a very linear PTAT signal, so temperature correction can always simply be accomplished with a linear gain and offset term. |
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