TLE4998P3 Datasheet, PDF (14/34 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor

TLE4998P
Electrical, Thermal and Magnetic Parameters
Calculation of the Junction Temperature
The total power dissipation P_TOT of the chip increases its temperature above the ambient
temperature.
The power multiplied by the total thermal resistance R_thJA (Junction to Ambient) leads
to the final junction temperature. R_thJA is the sum of the addition of the values of the two
components Junction to Case and Case to Ambient.
R_thJA = R_thJC + R_thCA
T_J = T_A + ∆T
∆T = R_thJA x P_TOT = R_thJA x ( V_DD x I_DD + V_OUT x I_OUT )
I_DD , I_OUT > 0, if direction is into IC
Example TLE4998P4 (assuming no load on Vout):
– V_DD = 5 V
– I_DD = 8 mA
– ∆T = 240 [K/W] x (5 [V] x 0.008 [A] + 0 [VA] ) = 9.6 K
For moulded sensors, the calculation with R_thJC is more adequate.
Magnetic Parameters
Table 6
Magnetic Characteristics
Parameter
Symbol Limit Values
Unit Notes
min. typ. max.
Sensitivity
S¹⁾
± 0.2 -
±6
%/mT ²⁾³⁾
Temperature
TC
coefficient of sensitivity
-150 0
150 ppm/ ⁴⁾
°C
See Figure 5
Magnetic field range MFR ± 50 ± 100⁵⁾ ± 200 mT
Programmable ⁶⁾
Integral nonlinearity Inl
- 0.1 -
0.1
%MFR ⁷⁾⁹⁾
Magnetic offset
Magnetic offset drift
Magnetic hysteresis
B_OS
∆B_OS
B_HYS
- 400 0
-5 -
0
-
400 µT
8)9)
5
µT / °C Error band ⁹⁾
10
µT
10)
1) _{Defined as ∆DYPWM / ∆B}
2) _{Programmable in steps of 0.024%}
3) _{@ VDD = 5V and TJ = 25°C}
4) _{For any 1}st _{and 2}nd _{order polynomial, coefficient within definition in chapter 8}
Data Sheet
14
V 1.0, 2008-07