TLE493D-P3I8 has an SPI interface and arrives in 3 x 3mm VSON, while TLE493D-W3B6 and TLE493D-P3B6 have I2C interfaces and have 2.8 x 2.9 TSOP6 packaging – TLE493D-P3B6 is the more accurate of the two.
“The sensors [are] developed according to ISO26262 and provide built-in diagnosis functions to support functional safety applications,” according to the company. Also, they “offer low matching drift over their lifetime – X/Y<1.7%, X-Y/Z=6.75%. Additionally, the system’s power consumption is low due to its wake-up mode”.
This matching drift is over -40 to 105°C, and is not true of the TLE493D-W3B6 which has the reduced performance of 1.9% and 10% respectively – that is the difference between the two TSOP-I2C parts. Full operational range is -40 to +125°C and 2.8 to 5.5V.
The above accuracy is after corrections have been applied by the host MCU using the sensor temperature (also available over the serial link) and equations provided in the data sheet.
Power consumption is a few mA operating, which drops to ≤1μA in deep sleep.
Generally, the MCU initiates each sample, which can be done at several kHz. To save power, the host can set the sensor to a self-sampling (16, 31, 125Hz or 1kHz) low-power mode, and the host can then sleep. If upper and lower thresholds for each magnetic axis in the sensor are crossed, the sensor initiates a hardware interrupt to wake the host – this is the ‘wake-up’ mode mentioned above.
To allow sensing at different distances, each sensor can be set into three sensitivity mode: ±50, ±100 or ±160mT.
Use is expected measuring mechanical angles and linear position associated with valves or pedals – including in the engine compartment – and controlling infotainment and navigation systems. Industrial and consumer applications are also envisaged.
Find the data sheets on these Infineon web pages:
TLE493D-W3B6
TLE493D-P3B6
TLE493D-P3I8
The same company released a set of ISO 26262 ASIL-B magnetic switch ICs in April
