The ATA5835 is a state of the art ultra-low power smart UHF transceiver based on an 8-bit AVR microcontroller. It is a highly integrated, System on Chip (SoC) consisting of an RF front end, a complex digital baseband and a low-power 8-bit AVR microcontroller, leading to a minimal BOM (Bill of Material) in customer applications. It offers the lowest power consumption in the market.

Outstanding RF performance, along with complex baseband signal processing, provide customers with excellent UHF link robustness thanks to its high sensitivity, blocking and image rejection. Highly configurable baseband processing offers flexibility for customers, such as multiple scanning functions, pattern based wake-up and automatic self-polling scenarios. For example, during polling, the IC can scan for specific message contents (IDs) and save valid telegram data in the FIFO buffer for later retrieval. The device integrates two receive paths that enable a simultaneous search for two telegrams with different modulations, data rates, wake-up conditions, etc. The ATA5835 offers additional flexibility as it enables up to eight different services with three channels each, which can be configured independently and with up to 16 channels polling schemes. A maximum of four service configurations can be placed in the EEPROM; the remaining are located in the SRAM, which allow on-the-fly modifications during IDLEMode via SPI commands or application software.

The ATA5835 includes an integrated antenna switch matrix with three antenna ports allowing triplexer operation (multiband operation for high-end applications) or antenna diversity operations and thus further reduces the external BOM cost. The RF switch can dynamically be configured to connect any antenna port to either the receiver or transmitter while providing excellent RX/TX isolation. The transmit path of the ATA5835 is based on a closed-loop fractional-N modulator with Gaussian shaping and preemphasis functionality that enables high data rates and mitigates EMC emissions. The internal microcontroller is built with 2 Kbytes SRAM and 20 Kbytes user Flash memory to support customer application software, LIN UART, as well as a debugWIRE and ISP interfaces for programming purposes.