AK2401 Datasheet, PDF (78/103 Pages) Asahi Kasei Microsystems – Direct Conversion Transceiver

[AK2401]
LPMODE: Receiving Analog Circuit (LNA, MIXER, PGA, AAF) Operation Mode
Select an operation mode of receiving analog circuit (LNA, MIXER, PGA, AAF). Refer to “10.1.1 LNA”
and “10.1.2 MIXER+PGA+AAF+ADC” for receiving performance.
0: Normal Power Mode
1: Low Power Mode
15.12. <0x15~0x16>PGA GAIN
Address
D7
D6
D5
D4
D3
D2
D1
D0
R/W
0x15
X
X
PGAGAIN_I[5:0]
R/W
Initial value
0
0
0
0
0
0
0x16
X
X
PGAGAIN_Q[5:0]
Initial value
0
0
0
0
0
PGAGAIN_I[5:0]: Ich PGA Gain Setting
PGAGAIN_Q[5:0]: Qch PGA Gain Setting
Set Ich/Qch PGA gain independently.
R/W
0
 AGCOFF bit= “1” <Address0x1F>
AGC function is OFF and the PGA gain settings are valid.
 AGCOFF bit= “0” <Address0x1F>
AGC starts operation with the default value set by PGAGAIN_I[5:0] bits. Normally, PGAGAIN_I bit
and PGAGAIN_Q bit should be set to “000000”.
PGAGAIN_I , PGAGAIN_Q
[5]
[4]
[3]
[2]
[1]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
・・・
0
1
1
0
1
0
1
1
1
0
0
1
1
1
0
・・・
1
0
1
1
1
1
1
0
0
0
1
1
0
0
0
1
1
0
0
1
1
1
0
0
1
1
1
0
1
0
1
1
0
1
0
1
1
0
1
1
1
1
0
1
1
1
1
1
X
X
(X: Do not care)
Gain
Unit
[0]
0
28 (default)
1
27
0
26
1
25
・・・
1
1
0
0
1
-1
・・・
1
-19
dB
0
-20
1
0
1
0
1
Do Not Use
0
1
X
017003093-E-00
78
2017/3