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

Operational ambient temperature

−40

27

85

°C

I/O and voltage regulator supply

voltage

1.8

3.0

3.6

V

I/O voltage ramp for reset activation;

Note 1

Ramp starts at VDD_IO ≤ 0.1 V

0.1

V/ms

I/O voltage ramp for reset activation;

Note 1

Ramp starts at 0.1 V < VDD_IO < 0.7 V

3.3

V/ms

Deep sleep mode current

AT$P=2

100

nA

Sleep mode current

AT$P=1

1.3

mA

Standby mode current

Note 3

0.5

mA

Current consumption continuous RX

AT$SR=1,1,−1

10

mA

Charge to send a Sigfox out of band

message, 0 dBm

AT$S0

0.12

C

Charge to send a bit, 0 dBm

AT$SB=0

0.08

C

Charge to send a bit with downlink

receive, 0 dBm

AT$SB=0,1

0.27

C

Charge to send the longest possible

Sigfox frame (12 byte) , 0dBm

AT$SF=00112233445566778899aabb

0.14

C

Charge to send the longest possible

Sigfox frame (12 byte) with downlink

receive, 0 dBm

AT$SF=00112233445566778899aabb,1

0.27

C

Charge to send a Sigfox out of band

message, 14 dBm

AT$S0

0.28

C

Charge to send a bit, 14 dBm

AT$SB=0

0.20

C

Charge to send a bit with downlink

receive, 14 dBm

AT$SB=0,1

0.35

C

Charge to send the longest possible

Sigfox frame (12 byte) , 14 dBm

AT$SF=00112233445566778899aabb

0.39

C

Charge to send the longest possible

Sigfox frame (12 byte) with downlink

receive, 14 dBm

AT$SF=00112233445566778899aabb,1

0.46

C

Modulated Transmitter Current,

Note 2

Pout=0 dBm; average

19.0

mA

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.