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TLE4998C3C Datasheet, PDF (9/42 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor | |||
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TLE4998C3C
General
interface is further described in Chapter 12. The output stage is an open-drain driver
pulling the output pin to low only. Therefore, the high level needs to be obtained by an
external pull-up resistor. This output type has the advantage that the receiver may use
an even lower supply voltage (e.g. 3.3 V). In this case the pull-up resistor must be
connected to the given receiver supply.
The IC is produced in BiCMOS technology with high voltage capability, and it also has
reverse-polarity protection.
Digital signal processing using a 16-bit DSP architecture together with digital
temperature compensation guarantee excellent long-time stability compared to analog
compensation methods.
While the overall resolution is 16 bits, some internal stages work with resolutions up to
20 bits.
2.3
Principle of Operation
⢠A magnetic flux is measured by a Hall-effect cell
⢠The output signal from the Hall-effect cell is converted from analog to digital
⢠The chopped Hall-effect cell and continuous-time A/D conversion ensure a very low
and stable magnetic offset
⢠A programmable low-pass filter to reduce noise
⢠The temperature is measured and A/D converted, too
⢠Temperature compensation is done digitally using a second-order function
⢠Digital processing of output value is based on zero field and sensitivity value
⢠The output value range can be clamped by digital limiters
⢠The final output value is represented by the data nibbles of the SPC protocol
Data Sheet
9
Rev 1.1, 2009-09
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