The ATA5282 is the first 3-dimensional LF receiver IC with digital 8-bit RSSI, whereas competing solutions provide analog RSSI outputs, where the microcontroller needs an additional A/D converter for signal decoding. In PEG systems, the RSSI function (measurement of the magnetic field strength) is important for the precise definition of the card's location. A PEG system recognizes by comparing the magnetic field strengths of the various trigger systems if the card is inside or outside of the car. If the card is not recognized to be within the car, the motor will not start. This helps to prevent unintended car start as caused, for example, by playing children. The 8-bit RSSI output, as well as the 3 inputs for 3-dimensional measurement, increase the position preciseness and thus the system safety.
The device allows typical data receiving distances of up to 2.5 m from the external trigger base stations, depending on the corresponding magnetic field strength. The ATA5282's operation voltage is 2 to 4.2 V within an operation temperature range of -40 to +85 degrees C.
Samples of the transceivers ATA5282 in extra small TSSOP8 packages are available now. Pricing starts at 1.05 US$ (10 k).
Footnote
3-D = 3-dimensional
A/D converter = Analog/ Digital converter
ASK = Amplitude Shift Keying
LF = Low Frequency
OOK = On-Off Keying
PEG = Passive Entry Go
RKE = Remote Keyless Entry
RSSI = Receive Signal Strength Indicator
