The ATA 5283 is an ultra low power ASK receiver IC. According to the manufacturer, Atmel, the device provides the industry's best trade off in terms of minimum current consumption and maximum sensitivity. Furthermore, it is the smallest available device for 125°C applications, such as tyre pressure monitoring.
The IC is designed for use in tyre pressure monitoring modules where it wakes up the TPM module and enables data programming during production and tyre change during service. Remote triggering and programming is usually done in a distance of about 2 m. Due to this, TPM systems are not based on short-distance triggering solutions but on LF receivers. The ATA5283 operates in the range of 2,0 to 4,2 V over temperatures of -40 to 125°C. It can withstand environmental temperatures on battery supply up to 175°C for short intervals.
To comply with automotive manufacturers' standards, a TPM module must have a minimum lifetime of 10 years. Since the integrated battery cannot be replaced, low current consumption is a must. The LF receiver ATA5283 is constantly in standby listening mode and monitors for a signal originating from the car or from a base station. The device switches off the TPM module when it is not needed and wakes up the module only if a valid preamble has been detected. The device's current consumption in listening mode with a sensitivity of 1 mV r.m.s. is as low as 1 µA typ, says Atmel, while competing products have a current consumption at least three times higher - a combination unique in industry.
Another key requirement in TPM applications is small outline and low weight. Since the high speed of a car wheel causes enormous centrifugal forces, a TPM module needs to be very small and may not exceed a weight of 35 g.
The ATA5283 supports ASK modulation (PWM, Manchester and Bi-Phase) with a data baud rate up to 4 Kbit/s. The data communication to the microcontroller occurs via a serial interface. In addition to data reception and decoding, the serial data interface can also be used to program set-up information into the microcontroller during production.
For more information contact Arrow Altech Distribution, 011 923 9600, EBV-Electrolink, 021 421 5350, Memec SA, 011 897 8600.
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