The ATA8520E is a Transceiver IC for up- and downlink operation in the EU (ETSI) 868MHz and US (FCC) 902MHz SIGFOX networks. It can be used to provide equipment for the Internet of Things (IoT) and other machine-to-machine communication using an air interface to the SIGFOX proprietary network. Industrial and consumer applications include environmental sensors, smart meters, patient monitors, home automation and building security systems. The ATA8520E incorporates an RF front end for up- and downlink to a SIGFOX base station, a digital baseband and a microcontroller in a single chip. Firmware stored in internal memory supports the chips operations, including handling of the SIGFOX protocol. The SIGFOX ID, PAC code and Encryption key are stored and secured inside the chip. A serial peripheral interface provides for external control and configuration. The single chip solution provide extreme low power consumption. The Supply-voltage range is 2.9V-3.1V (3V operation mode) or 3.3V-5.5V (5V operation mode).

Additional Features

• Fully-integrated, single-chip RF transceiver (SIGFOX™compliant)
• System-on-chip solution including SIGFOX related protocol handling for modem operation
• AVR^® microcontroller core with embedded firmware, SIGFOX, protocol stack and ID/PAC
• Supports up- and downlink operation, i.e., transmit and receive of data telegrams with SIGFOX base stations in EU and US
• The device has to be configured before the first usageOperating frequencies:
• EU: uplink 868.0MHz to 868.6MHz, downlink 869.4MHz to 869.65MHz
• US: uplink and downlink 902MHz to 906MHz
• Low current consumption:
• 32.7mA (EU) / 16.7mA(US) during transmit and
• 10.4mA (EU) / 10.5mA (US) during receive operation
• Typical OFF mode current: 5nA (maximum 600nA at VS= +3.6V andT = +85°C)
• Data rate:
• EU: 100bit/s with DBPSK modulation for uplink and 600bit/s with GFSK modulation for downlink
• US: 600bit/s with DBPSK modulation for uplink and 600bit/s with GFSK modulation for downlink
• SPI interface for data access and transceiver configuration and control Event signal indicates the status of the IC to an external microcontroller
• Power-up (typical 10ms (EU), 30ms (US) from OFF mode to idle mode)
• Supply voltage ranges 1.9V to 3.6V and 2.4V to 5.5V (SIGFOX compliant supply range 3V ±5% and 3.3V to 5.5V)
• Temperature range –40°C to +85°C
• ESD protection at all pins (±4kV HBM, ±200V MM, ±750V FCDM)
• Small 5×5mm QFN32 package/pitch 0.5mm