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Application
Capacitance
220uF x 2
Voltage regulating capacitors
1uF, 100nF
Digital signal noise
700/800 MHz, 850/900MHz
39pF, 33pF
frequency band
1500/1700/1800/1900MHz,
18pF, 10pF,
2100/2300MHz,
8.2pF, 6.8pF,
2500/2600MHz,
3.3pF
3500/3700MHz, 5GHz
frequency band
Table 3-3 Filter capacitor design for power supply
A stable power supply ensures the normal operation of AIW-356 DQ-JK1 module. Make sure
that the ripple of the power supply less than 300mV in design. Ensure the power source
voltage should be not lower than 3.135V when in MAX consumption mode, otherwise the
module may shut down or restart. The power supply requirement is shown in the following
Figure 3-3:
Figure 3-3 Power supply requirement
Description
To reduce power fluctuations of the
module in operation, use low-ESR
capacitors.
For LDO or DC/DC power supply, the
capacitance should be no less than
440uF. For battery power supply, the
capacitance can
be reduced to 100 uF to 200uF.
Filter out the interference generated
from the clock and digital signals
Filter out low frequency band RF
interference
Filter out medium/high frequency band
RF interference
23
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