User's Manual
Table Of Contents
- Preface
- Introduction
- Mechanical
- HardwareOverview
- HardwareInterface
- ElectricalandEnvironmental
- RFInterface
H380 M.2 Series Module Hardware User Manual page
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5 Hardware Interface
5.1 Power Interface
5.1.1 Power Supply
H380 module requires a 3.135 V~ 4.4V DC power supply to provide 2A current during the GSM
transmitting burst.
Input power supply requirements as listed below:
Parameter Minimum Typical Maximum Unit
+3.3V 3.135 3.3 4.4 V
Note:
1. The ripple of Power supply must be lower than 200mV.
2. Power supply voltage does not drops below 3.135V during the 2G transmitting burst.
The filter capacitor of the supply circuit design are as follows:
Recommended
capacitor
Application Description
300uF Supply capacitor
Reduce power wave in call. The value of capacitor
is more bigger more better.
10nF, 100nF Digital signal noise Filtering interference from clock and digital signal.
8.2pF, 10pF 1800/1900/2100 MHz bands
Filtering the RF reference.
33pF, 39pF 850/900 MHz bands
Filtering the RF reference.
Recommended design: