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ZSSC3240CC1B Datasheet(PDF) 57 Page - Renesas Technology Corp |
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ZSSC3240CC1B Datasheet(HTML) 57 Page - Renesas Technology Corp |
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57 / 64 page  ZSSC3240 Datasheet Nov.27.20 Page 57 S = [ [ ZSP 2 23 ∙ [[ SOT_sens 2 21 ∙ |ZSS|] -225 225-1 + 2 23] -225 225-1 ]-225 225-1 + 2 23+ SENS_shift ]0 224-1 Equation 18 6.6.3.2. Temperature Signal Correction Temperature is measured either internally by the ZSSC3240 or through an additional external element or by means of a combination of ZSSC3240-internal and external temperature sensing capabilities; see sections 6.2.3 and 6.2.4. Temperature correction contains both linear gain and offset terms as well as a second-order term to correct for any nonlinearities. For temperature, second-order compensation for nonlinearity is always parabolic. The correction equation terms are as follows: T Corrected temperature sensor reading output via digital interface; range [0HEX to FFFFFFHEX] Gain_T Gain coefficient for temperature; range [-7FFFFFHEX to 7FFFFFHEX] T_Raw Raw temperature reading after AZ correction; range [-7FFFFFHEX to 7FFFFFHEX] Offset_T Offset coefficient for temperature; range [-7FFFFFHEX to 0x7FFFFFHEX] SOT_T Second-order term for temperature source nonlinearity; range [-7FFFFFHEX to 7FFFFFHEX] T_Shift Shift for post-calibration/post-assembly offset compensation [-7FFFFFHEX to 7FFFFFHEX] The correction formula is best represented as a two-step process as follows: Simplified: ZT = 4 ∙ Gain_T 223 ∙ ( T_Raw + 4 ∙ Offset_T) + 223 (delimited to positive number range) Equation 19 T = ZT 223 ∙ ( 4 × SOT_T 223 ∙ ZT + 223)+ T_shift (delimited to positive number range) Equation 20 Complete: ZT = [[ Gain_T 2 21 ∙ [T_Raw + 4 ∙ Offset_T ] -225 225-1] -225 225-1 + 2 23] 0 225-1 Equation 21 T = [ ZT 2 23 ∙ [[ SOT_T 2 21 ∙ ZT ] -225 225-1 + 2 23] -225 225-1 + T_shift ]0 224-1 Equation 22 |
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