ZSSC3123AI2 datasheet(53/63 Pages) IDT

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ZSSC3123 Datasheet

January 26, 2016

Offset

Raw

Gain

Raw

SOT

)

(

6.2

Temperature Signal Compensation

Temperature is measured internally. Temperature correction contains both linear gain and offset terms as well as a second-

order term to correct for any nonlinearity.

Note: The following equation is only meant to show the general form and capabilities of the internal ZSSC3123 temperature

signal conditioning.

(23)

Where:

Symbol

Range

Description

Raw_T

[0,16383]

Raw temperature reading

Gain_T

[-32768,32767]

Gain correction for internal temperature

Offset_T

[-32768,32767]

Offset correction for internal temperature

SOT_T

[-32768,32767]

Second-order correction for internal temperature

[-32768,32767]

Corrected temperature output value

6.3

Limits on Coefficient Ranges

There are range limits on some of the calibration coefficients that will be enforced by the calibration routine provided by IDT.

These limits ensure the integrity of the internal calculations and would only limit the most extreme cases of sensor correction.

Note: For Alarm-only applications, it is critical that the coefficient verification feature of the calibration routine is used since

diagnostics are not reported for the Alarms (see section 3.4 for more details)

Table 6.1 shows the limits for correction for the grade of temperature dependency and 2

nd nonlinearity of this dependency

Table 6.1

Limits on Coefficient Ranges

Coefficient

Correction

Condition

TCO

6060 PPM/K

SOT_TCO

74 PPM/K

TCG

12120 PPM/K

Based on raw temperature values

SOT_TCG

147 PPM/K

Based on raw temperature values

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