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FIBOCOM NL668-LA Series Hardware Guide
Page 23 of 61
Power on/off, or for external low current (< 80mA) circuits. leave the signal floating if no use. The logic
level of VDD_EXT is defined as follows:
Table 4-3 VDD_EXT logic level
Parameter
Minimum
Typical
Maximum
Unit
VDD_EXT
1.71
1.8
1.89
V
4.4 Power Consumption
The power consumption of NL668-LA series module measured at 3.8V power supply is shown as follow
table, for USB sleep and USB wakeup AT commands please refer to 6.1.2 section:
Table 4-4 Power consumption
Parameter
Mode
Condition
Average Current Typ. (mA)
I
off
Power off
Module power off
0.03
I
idle
Radio off
GSM
MFRMS=5 (USB sleep)
20
MFRMS=5 (USB
wakeup
)
30
WCDMA
DRX=8 (USB sleep)
20
DRX=8
(USB
wakeup
)
30
LTE FDD
Paging cycle #64 frames (USB sleep)
20
Paging cycle #64 frames
(USB
wakeup
)
30
LTE TDD
Paging cycle #64 frames (USB sleep)
20
Paging cycle #64 frames
(USB
wakeup
)
30
Radio off
AT+CFUN=0,0 (USB sleep)
20
AT+CFUN=0,0
(USB
wakeup
)
30
I
sleep
GSM
MFRMS=5 (USB sleep)
3
WCDMA
DRX=8 (USB sleep)
3
LTE FDD
Paging cycle #64 frames (USB sleep)
4
Paging cycle #128 frames (USB sleep)
3
Paging cycle #256 frames (USB sleep)
3
LTE TDD
Paging cycle #64 frames (USB sleep)
4
Paging cycle #128 frames (USB sleep)
3
Paging cycle #256 frames (USB sleep)
3