Atmel Corporation, a global leader in the development and fabrication of advanced semiconductor solutions, has unveiled the availability of the new highly-integrated and low-power ATA6285 and ATA6286 microcontroller-transmitter ICs. The new ICs have sensor interface for tire pressure monitoring (TPMS) sensor gauge systems.
The new devices include all necessary building blocks to support the measurement and calibration of simple capacitive pressure and motion sensors, plus the complete RF transmission functionality. These are the first such devices on the market.
The new ICs enable the development of cost-effective applications by allowing the system designer to freely choose simple, low-cost, non-calibrated sensors. These capacitive sensors can be calibrated easily and with minimum effort by the customer's firmware, within the integrated AVR microcontroller. As a result, the external sensors can be less sophisticated and smaller. This also makes the new ICs well-suited for sensor manufacturers, who wish to develop their own integrated sensor modules.
The single-package devices combine Atmel's ATA5756 and ATA5757 RF transmitters with Atmel's well-known, low-power, ATmega AVR 8-bit Flash microcontroller family. The new ICs are designed to control and transmit data gained from capacitive pressure and motion sensors. Their high functionality, such as integrated temperature sensor with shut-down mode, 90-kHz slow-oscillation mode for timer wake-up in sleep mode, and LF input with several header options, makes them a fit for pressure sensor systems.
The new devices are optimised to ensure low current consumption–in sleep mode is as low as 0.5 microamps. The maximum sleep-mode current consumption is 0.85 microamps at 85 degrees C in 90-kHz slow-oscillation mode, whereas the current consumption during sensor measurement is as low as 200 microamps, which is about 10 times less than piezo-resistive sensor solutions. In transmission mode, the typical current consumption is 8.5 mA at 6 dBm. The programmable, integrated 125-kHz wake-up receiver channel consumes less then 1.7 microamps in active listening mode.
The ATA6285 operates at 315 MHz, whereas the ATA6286 is used for 433 MHz operation. Both devices are suited for ASK and FSK transmission with a data rate of typically 10 kBaud in Manchester mode. The parts can be operated at 2V to 3.6V from a single Li-cell power supply at an operation temperature of -40 degrees C to +125 degrees C, and a storage temperature of -40 degrees C to +150 degrees C.