AW5007ASTR

Feb 2018 V1.2

www.awinic.com.cn

9

Copyright © 2014 SHANGHAI AWINIC TECHNOLOGY CO., LTD

APPLICATION INFORMATION

EN Control

AW5007A supports earphone. When baseband detects earphone inserting, GPIO will pull down, cutting

off AW5007A to avoid unnecessary power consumption.

Choice of components

Take Figure 1 for example:

Filter block near PIFA antenna is composed of L6 and C3. These two components can be removed for

Dipole antenna. Typical value of L6 is 120 nH and of C3 is 22 pF.

Filter block of FM signal is composed of C1 and L1. GSM signal could go through and FM signal will be

blocked. GSM antenna

π-type matching circuit is composed of C2, L3 and L2, adjustable based on GSM

antenna characteristics. Typically C1 is 22 pF and L1 is 120 nH.

Matching circuit of FM signal path is composed of C4, L4, L5 and L7. FM signal could go through and

GSM signal will be blocked. Typically L4 is 100 nH, L5 is 68 nH and L7 is 33 nH.

C5 is supply filtering capacitor. C6 is DC-blocking capacitor. Both are 47 nF typically.

Only when supporting earphone antenna application, C7 is added with the value of 47 nF.

Following tables show recommended inductor/capacitor types and values.

CHOICE OF INDUCTOR

PART No.

TYP.

Q(min)

Frequency

MFR

SIZE

LQG15HS33NJ02

33nH

8

100MHz

Murata

0402

LQG15HS68NJ02

68nH

8

100MHz

0402

LQG15HSR12J02

120nH

8

100MHz

0402

LQG15HSR10J02

100nH

8

100MHz

0402

SDCL1005C33NJTDF

33nH

8

100MHz

Sunlord

0402

SDCL1005C68NJTDF

68nH

8

100MHz

0402

SDCL1005CR12JTDF

120nH

8

100MHz

0402

SDCL1005CR10JTDF

100nH

8

100MHz

0402

CHOICE OF INDUCTOR

PART No.

TYP.

Voltage

MFR

SIZE

GRM1555C1H220JA01

22pF

25V

Murata

0402

GRM1555C1H390JA01

39pF

25V

0402

GRM155R71C473KA01

47nF

16V

0402