MLX90308 データシートの表示（PDF） - Melexis Microelectronic Systems

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MLX90308

Programmable Sensor Interface

Melexis Microelectronic Systems  

MLX90308

Programmable Sensor Interface

Compensation Trade-Offs

A compromise must be made between temperature

compensation and pressure correction. The EEPROM

space where the signal coefficients are stored is

shared with the temperature coefficients, with the

result that an EEPROM byte can be used either for a

temperature coefficient or for a signal coefficient, but

not both. Table 6 presents the possibilities among the

maximum number of temperature gaps and the

maximum number of signal gaps.

Table 5. PNB_TNB Bit Definition;

Temperature Gaps

# of Temperature Gaps

Fixed (1)

2 Gaps

3 Gaps

4 Gaps

4 LSB of PNB_TNB

0

5

8

11 (B hex)

Table 4. PNB_TNB Bit Definition;

Pressure Gaps

# of Pressure Gaps

Fixed

1

2

3

4

5

4MSB of PNB_TNB Value

15 (F hex)

14 (E hex)

12 (C hex)

10 (A hex)

8

6

Table 6. Temperature

& Signal Limitations

Maximum number of

temperature gaps

Maximum number of

signal gaps

Fixed Gain and

fixed Offset

5 Gaps

2 Gaps

3 Gaps

3 Gaps

2 Gaps

4 Gaps

Fixed signal

Figure 4. Signal

Linearity Correction

Output

MLX90308

PC5

PC4

PC3

PC2

PC1

3901090308

Rev 007

0

P2 P3 P4 P5

Page 12

May/12

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