1.
General Product Description
1.1
Overview
The Atmel® ATA5830 is a highly integrated, low power UHF ASK/FSK RF-transceiver. The Atmel ATA5830 is partitioned into
several sections; an RF frontend, a digital baseband, and a low power 8 bit AVR microcontroller. The product is designed for the
ISM frequency bands in the ranges of 310 to 318MHz, 418 to 477MHz and 836 to 928MHz. External part count is kept to a
minimum due to the very high level of integration in this device. By combining outstanding RF performance with highly
sophisticated baseband signal processing, robust wireless communication can be easily achieved. The receive path uses a low-
IF architecture with an integrated double quadrature receiver and digitized IF processing. This results in high image rejection
and excellent blocking performance. The transmit path uses a closed loop fractional-N modulator with gaussian shaping and
pre-emphasis functionality for high data rates. In addition, the highly flexible and configurable baseband signal processing
allows the transceiver to operate in several scanning, wake-up and automatic self polling scenarios. For example, during polling
the IC can seek certain message content (IDs) and save valid telegram data in the FIFO buffer for later retrieval. The device
possess two receive paths that enable parallel search for two telegrams with different modulations, data rates, wake-up
conditions, etc. The highly configurable and autonomous scanning capability enables polling of up to five application channels
such as 3-channel RKE, TPMS, PEG. The configuration of the transceiver is stored in a 512 byte EEPROM. The SPI allows for
external control and reconfiguration of the device. The internal microcontroller and 6 KB Flash can be used to add customer
extensions to the Atmel firmware. The debug wire and ISP interface are available for programming purposes.
1.2
Target Applications
The transceiver is designed to be used in the following application areas:
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Remote Keyless Entry System (RKE)
Passive Entry Go System (PEG)
Tire Pressure Monitoring System (TPM,TPMS)
Remote Start System (RS)
Remote Control System, e.g. garage door open
Smart RF applications
Telemetering Systems
Three applications with a total of 5 channels are supported by the Atmel firmware for autonomous self polling.
1.3
Main Extended Features of the Atmel ATA5830
1.3.1 RF Performance
The Atmel ATA5830 provides high sensitivity and programmable transmit power up to 14dBm. The high image rejection and
outstanding blocking performance enable a robust application against interferer with a low cost design. In addition, the
programmable channel filter bandwidth provides flexibility to adapt to various system requirements.
1.3.2 Automatic Self Polling and Multi Channel Capability
The autonomous self polling supports the automatic scanning for three different applications such as Remote Keyless Entry
(RKE), Tire Pressure Monitoring System (TPMS) and Remote Start (RS) using one IC. Additionally multi channel systems with
up to three frequencies can be scanned. This means five frequencies can be scanned in the autonomous polling scheme; three
for RKE, one for TPMS and one for RS. The configuration of each application is independent of the others. This is possible
because of the flexibility in the digital baseband and two different baseband receiving paths. The IC can immediately scan all
applications upon power-up without the need for any initial configuration by an external microcontroller.
1.3.3 Wake-up Scenario and ID Scanning
The powerful baseband signal processing is designed to offload these time consuming tasks from the host controller. This
allows the transceiver to discard unwanted telegrams and limit external microcontroller wake up to valid telegrams only. Up to 7
criteria can be used to determine the telegram validity from carrier check on the lowest level to start of frame ID pattern match at
the highest level.
Atmel ATA5830/ATA5830N [Summary DATASHEET]
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