Altec gsm socket al7024s Manuale Utente

AL7020S, AL7024S Designer’s Guide 

 

Doc. No. DG_7024E 

Altec Electronic AG  

Seite 26 / 32 

 
6.  Locate cables and connectors so as to avoid coupling from high frequency circuits. 
 
7.  If a mulilayer board design is used, make no cuts in the ground or power planes 

and be sure the ground plane covers all traces. 

 
8.  Minimize the number of through-hole connections on traces carrying high 

frequency signals. 

 
9.  Avoid right angle turns on high frequency traces. Forty-five degree corners are 

good, however, radius turns are better 

 

 

Pins 26 and 41 are for grounding. Connect all of them to the same ground-layer or a 
big ground-area on your board. The ground-area should completely cover the area 
below and around the module and the regulator. Make the connections as wide as 
possible. For better RF-perfomance, connect the metal-housing to ground, very near 
the ground-pins of the module. 

 
 

 

A power supply with 5.0V DC +/- 5% (5V models) and a minimum power of 1.5A  is 
strictly required to supply this module. The supply-regulator should be placed as close 
to the module as possible (about 5cm or nearer). The 5V-trace between regulator and 
module should be at least 2.5mm wide or better an entire layer. 
 
 

 Important: 
 
 The module draws up to 1.3A max. for 577µs every 4,6ms at GSM transmit level 
 PCL5 (2W). Therefore a regulator with fast transient response and good load   
 regulation is strongly recommended.    
 

 
 
 

 

 
 
 

Peak 1.3 A 

Current 
Measurement 
@ PCL 5