© Semiconductor Components Industries, LLC, 2017
February, 2017 − Rev. 5
1 Publication Order Number:
AX−SFEU/D
AX-SFEU, AX-SFEU-API
Ultra-Low Power,
AT Command / API Controlled,
Sigfox
)
Compliant
Transceiver IC for Up-Link
and Down-Link
OVERVIEW
Circuit Description
AX−SFEU and AX−SFEU−API are ultra−low power
single chip solutions for a node on the Sigfox network with
both up− and down−link functionality. The AX−SFEU chip
is delivered fully ready for operation and contains all the
necessary firmware to transmit and receive data from the
Sigfox network in Europe. It connects to the customer
product using a logic level RS232 UART. AT commands are
used to send frames and configure radio parameters.
The AX−SFEU−API variant is intended for customers
wishing to write their own application software based on the
AX−SF−LIB−1−GEVK library.
Features
Functionality and Ecosystem
• Sigfox up−link and down−link functionality controlled
by AT commands or API
• The AX−SFEU and AX−SF−API ICs are part of a
whole development and product ecosystem available
from ON Semiconductor for any Sigfox requirement.
Other parts of the ecosystem include
♦ Ready to go development kit
DVK−SFEU−[API]−1−GEVK including a 2 year
Sigfox subscription
♦ Sigfox Ready
®
certified reference design for the
AX−SFEU and AX−SFEU−API ICs
♦ AX−SF10−MINI21−868−B1 and
AX−SF10−ANT21−868−B1, Sigfox compliant SMT
modules based on AX−SFEU with 50 W pads or chip
antenna. Not available for AX−SFEU−API
General Features
• QFN40 5 mm x 7 mm package
• Supply range 1.8 V* − 3.6 V
• −40°C to 85°C
• Temperature sensor
• Supply voltage measurements
*The device is operational from 1.8 V to 3.6 V. However, a supply
voltage below 2.0 V is considered an extreme condition.
Details see Table 4.
• 10 GPIO pins
♦ 4 GPIO pins with selectable voltage measure
functionality, differential (1 V or 10 V range) or
single ended (1 V range) with 10 bit resolution
♦ 2 GPIO pins with selectable sigma delta DAC
output functionality
♦ 2 GPIO pins with selectable output clock
♦ 3 GPIO pins selectable as SPI master interface
♦ Integrated RX/TX switching with differential
antenna pins
Power Consumption
• Ultra−low Power Consumption:
♦ Charge required to send a Sigfox OOB packet at
14 dBm output power: 0.28 C
♦ Deepsleep mode current: 100 nA
♦ Sleep mode current: 1.3 mA
♦ Standby mode current: 0.5 mA
♦ Continuous radio RX−mode at 869.525 MHz :
10 mA
♦ Continuous radio TX−mode at 868.130 MHz
19 mA @ 0 dBm
49 mA @ 14 dBm
High Performance Narrow−band Sigfox RF Transceiver
• Receiver
♦ Carrier frequency 869.525 MHz
♦ Data−rate 600 bps FSK
♦ Sensitivity
−126 dBm @ 600 bps, 869.525 MHz, GFSK
♦ 0 dBm maximum input power
• Transmitter
♦ Carrier frequency 868.13 MHz
♦ Data−rate 100 bps PSK
♦ High efficiency, high linearity integrated power
amplifier
♦ Maximum output power 14 dBm
♦ Power level programmable in 1 dBm steps
Applications
Sigfox networks up−link and down−link.
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