TLE4997E2 Infineon Technologies, TLE4997E2 Datasheet - Page 27

• Manufacturer Part Number: TLE4997E2
• Description: IC HALL SENSOR LINEAR SSO-3
• Manufacturer: Infineon Technologies
• Type: Linear - Programmabler

Specifications of TLE4997E2

• Sensing Range: -200mt Trip ~ 200mT Release
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 10mA
• Current - Output (max): 1mA
• Output Type: Analog, Ratiometric
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 3-SIP, SSO-3-10
• Operating Supply Voltage: 5 V
• Mounting Style: Through Hole
• Maximum Operating Temperature: + 150 C
• Minimum Operating Temperature: - 40 C
• Maximum Output Current: 30 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: SP000235288

8
The magnetic field strength of a magnet depends on the temperature. This material
constant is specific to different magnet types. Therefore, the TLE4997 offers a second
order temperature compensation polynomial, by which the Hall signal output is multiplied
in the DSP. There are three parameters for the compensation:
• Reference temperature T
• A linear part (1
• A quadratic part (2
The following formula describes the sensitivity dependent on the temperature in relation
to the sensitivity at the reference temperature
For more information, see also the signal processing flow in
The full temperature compensation of the complete system is done in two steps:
1. Pre-calibration in the Infineon final test.
2. Overall System calibration.
Table 16
Parameter
Register size
1
Quantization steps of
Register size
2
Quantization steps of
Register size
Reference temperature
Quantization steps of
1)
2)
3)
Data Sheet
st
nd
The parameters TC1, TC2, T0 are set to maximally flat temperature characteristics
regarding the Hall probe and internal analog processing parts.
The typical coefficients TC1, TC2, T0 of the magnetic circuitry are programmed. This
can be done deterministically, as the algorithm of the DSP is fully reproducible. The
final settings of the TC1, TC2, T0 values are relative to the pre-calibrated values.
Full adjustable range: -2441 to +5355 ppm/°C, can be only used after confirmation by Infineon
Full adjustable range: -15 to +15 ppm/°C², can be only used after confirmation by Infineon
A quantization step of 1°C is handled by algorithm (See Application Note).
order coefficient
order coefficient
Temperature Compensation
TC
TC
T
Temperature Compensation
0
1
2
st
order) TC
TC
S
TC
nd
TC
TC
TC
T
1
0
2
order) TC
T ( )
1
2
Symbol Limit Values Unit
TL
TC
∆ TC
TQ
TC
∆ TC
TR
T
∆ T
0
=
0
1
0
1
2
1
1
2
+
2
TC
min.
-
-1000 2500 ppm/ °C
-
- 4
-
- 48
1
×
15.26
0.119
(
T T
16
27
–
max.
9
8
4
3
64
T
0
0
)
:
+
TC
bit
ppm/ °C
bit
ppm/ °C²
ppm/ °C²
bit
°C
°C
2
×
Temperature Compensation
(
T T
Figure
–
Notes
Unsigned integer values
1)
Unsigned integer values
2)
Unsigned integer values
3)
0
)
2
5.
V 2.08, 2008-09
TLE4997