ZSC31010CEC datasheet(29/43 Pages) IDT

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ZSC31010 Datasheet

January 20, 2016

EEPROM Range

Description

Notes

99:96

{SOT_cfg,

Pamp_Gain}

Bits [99:98] = SOT_cfg

(For more details, see section 3.6.1.)

00 = SOT applies to Bridge

01 = SOT applies to Tcg

10 = SOT applies to Tco

11 = Prohibited

Bits [97:96] = PreAmp Gain

00 => 6

01 => 24 (default setting)

10 => 12

11 => 48

(Only the default gain setting (24) is tested at the factory;

all other gain settings are not guaranteed.)

3.6.

Calibration Math

3.6.1.

Correction Coefficients

All terms are calculated external to the IC and then programmed to the EEPROM through the serial interface.

Table 3.7

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 the following:

Bridge measurement

Temperature coefficient of offset (Tco)

Temperature coefficient of gain (Tcg)

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

Note: There are limitations for the SOT for the bridge measurement and for the SOT for the Tco, which are

explained in section 3.6.2.7.

TSETL

RAW PTAT reference value. (See Technical Note—ZSC31010, ZSC31015, and ZSSC3015 Calibration

Sequence, DLL, and EXE for details.)

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).

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