AX−SIGFOX
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6
DC Characteristics
Table 4. SUPPLIES
Conditions for all current and charge values unless otherwise specified are for the hardware configuration described in the AX−Sigfox
Application Note: Sigfox Compliant Reference Design.
Symbol Description Condition Min Typ Max Units
T
AMB
Operational ambient temperature −40 27 85 °C
VDD
IO
I/O and voltage regulator supply
voltage
1.8 3.0 3.6 V
VDD
IO_R1
I/O voltage ramp for reset activation;
Note 1
Ramp starts at VDD_IO ≤ 0.1 V 0.1 V/ms
VDD
IO_R2
I/O voltage ramp for reset activation;
Note 1
Ramp starts at 0.1 V < VDD_IO < 0.7 V 3.3 V/ms
I
DS
Deep sleep mode current AT$P=2 100 nA
I
SLP
Sleep mode current AT$P=1 1.3
mA
I
STDBY
Standby mode current
Note 3
0.5 mA
I
RX_CONT
Current consumption continuous RX AT$SR=1,1,−1 10 mA
Q
SFX_OOB_0
Charge to send a Sigfox out of band
message, 0 dBm
AT$S0 0.12 C
Q
SFX_BIT_0
Charge to send a bit, 0 dBm AT$SB=0 0.08 C
Q
SFX_BITDL_0
Charge to send a bit with downlink
receive, 0 dBm
AT$SB=0,1 0.27 C
Q
SFX_LFR_0
Charge to send the longest possible
Sigfox frame (12 byte) , 0dBm
AT$SF=00112233445566778899aabb 0.14 C
Q
SFX_LFRDL_0
Charge to send the longest possible
Sigfox frame (12 byte) with downlink
receive, 0 dBm
AT$SF=00112233445566778899aabb,1 0.27 C
Q
SFX_OOB_14
Charge to send a Sigfox out of band
message, 14 dBm
AT$S0 0.28 C
Q
SFX_BIT_14
Charge to send a bit, 14 dBm AT$SB=0 0.20 C
Q
SFX_BITDL_14
Charge to send a bit with downlink
receive, 14 dBm
AT$SB=0,1 0.35 C
Q
SFX_LFR_14
Charge to send the longest possible
Sigfox frame (12 byte) , 14 dBm
AT$SF=00112233445566778899aabb 0.39 C
Q
SFX_LFRDL_14
Charge to send the longest possible
Sigfox frame (12 byte) with downlink
receive, 14 dBm
AT$SF=00112233445566778899aabb,1 0.46 C
I
TXMOD0AVG
Modulated Transmitter Current,
Note 2
Pout=0 dBm; average 19.0 mA
I
TXMOD14AVG
Modulated Transmitter Current,
Note 2
Pout=14 dBm; average 49.0 mA
1. If VDD_IO ramps cannot be guaranteed, an external reset circuit is recommended, see the AX8052 Application Note: Power On Reset
2. The output power of the AX−Sigfox can be programmed in 1 dB steps from 0 dBm – 14 dBm. Current consumption values are given for a
matching network that is optimized for 14 dBm output. 0 dBm transmission with typically 10 mA can be achieved with other networks that
are optimized for 0 dBm operation.
3. Internal 20 MHz iscillator, voltage conditioning and supervisory circuit running.