AW5005 datasheet
October 2013 V1.2
Copyright © 2013 SHANGHAI AWINIC TECHNOLOGY CO., LTD
Page 16 of 19
APPLICATION INFORMATIONS
1.1 EN control
The AW5005 includes an internal
switch to turn off the entire chip:
apply logic high to EN to turn on,
and a logic low to shut down.
1.2 List of components
1. The AW5005 requires only one ex-
ternal inductor for input matching. If
the device/phone manufacturers
implement very good power supply
filtering on their boards, the bypass
capacitor mentioned in this applica-
tion circuit may be optional. With
the capacitor we can get better
performance like a little higher gain
etc. The value is optimized for the
best gain, noise figure, return loss
performance. Typical value of in-
ductor is 9.1nH, capacitor is 1nF.
For schematics see Figure2.
2. The output of AW5005 is internally
matched to 50 ohm and a DC
blocking capacitor is integrated
on-chip, thus no external compo-
nent is required at the output.
3. The AW5005 should be placed
close to the GPS antenna with the
input-matching inductor. Use 50-
ohm microstrip lines to connect RF
INPUT and RF OUTPUT. Bypass
capacitor should be located close to
the device. For long Vcc lines, it
may be necessary to add more
decoupling capacitors. Proper
grounding of the GND pins is very
important.
Table6 lists the recommended inductor types and values; Table 7 lists the recommended
capacitor types and values. Table6: list of inductor
Table7: list of capacitor