ZSC31015EAG1-R datasheet(37/53 Pages) RENESAS

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November 14, 2016

ZSC31015 Datasheet

3.6.

Calibration Math

3.6.1.

Correction Coefficients

All terms are calculated external to the ZSC31015 and then programmed to the EEPROM through the serial

interface.

Table 3.6

Correction Coefficients

Coefficient

Description

Gain_B

Gain term used to compensate span of Bridge reading

Offset_B

Offset term used to compensate offset of Bridge reading

Gain_T

Gain term used to compensate span of Temp reading

Offset_T

Offset term used to compensate offset of Temp reading

SOT

Second Order Term. The SOT can be applied as a second order correction term for one of the following:

Bridge measurement

Temperature coefficient of offset (Tco)

Temperature coefficient of gain (Tcg)

The EEPROM bits 99:98 determine what SOT applies to.

TSETL

RAW_PTAT or ExtTemp reading (upper 7-bits) at low temperature at which calibration was performed

(typically room temperature)

Tcg

Temperature correction coefficient of bridge gain term. This term has an 8-bit magnitude and a sign bit

(Tc_cfg[2].

Tco

Temperature correction coefficient of bridge offset term. This term has an 8-bit magnitude, a sign bit

(Tc_cfg[0]), and a scaling bit (Tc_cfg[1]), which can multiply its magnitude by 8.

3.6.2.

Interpretation of Binary Numbers for Correction Coefficients

BR_Raw should be interpreted as an unsigned number in the set [0, 16383] with a resolution of 1.

T_Raw should be interpreted as an unsigned number in the set [0, 16383], with a resolution of 4.

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