AK2401 Datasheet, PDF (77/103 Pages) Asahi Kasei Microsystems – Direct Conversion Transceiver

[AK2401]
TXOLV[1:0]: Driver Amplifier Output Power Setting
Set the output power of driver amplifier. Refer to “10.2. Transmission Characteristics” for details.
TXOLV
[1]
[0]
0
0
0
1
1
0
1
1
TX Output
Power
-6
0
3
6
Unit
dBm
15.11. <0x14>RX
Address
D7
0x14
X
Initial value
D6
D5
D4
D3
D2
D1
D0
R/W
X
TRIMREG RXLPF_
_PH
FC
IQ_SEL
ANA_
PATH
MAIN_
PATH
LPMODE
R/W
0
0
0
0
1
0
TRIMREG_PH: I/Q Orthogonal Phase Calibration Setting
Select either using the calibration result of the factory setting or using setting value of PH_ADJ[4:0] bits
for I/Q orthogonal phase calibration. The calibration result of factory setting is loaded by setting
PFUSE_RDST bit = “1” <Address0z41>. The factory calibration conditions are LOIN Input =900MHz,
0dBm, <Address0x12> DIVSEL[1:0] bit=”01”(divided by 2). Adjust PH_ADJ[4:0] bits If the local input
signal condition is different. Phase unbalancing may be improved. Normally, TRIMREG_PH bit should
be set to “0”.
0: Use Calibration Result of the Factory Setting
1: Use a Value Set by PH_ADJ[4:0] bits <Address0x42>
RXLPF_FC: Cutoff Frequency Setting
Set a cutoff frequency of the gain variable PGA that is composed by first order low-pass filter. Refer
to ”13.5.2 Analog Filter Frequency Characteristics” for frequency characteristics. Refer to “13.8.2
Digital Filter Frequency Characteristics” for recommended settings.
0: Low Cutoff Mode
1: High Cutoff Mode
IQ_SEL: Receiving Analog Baseband Signal Output I/Q Setting
The output receiving analog baseband signal from the AOUT_P and AOUT_N pins when ANA_PATH
bit= “1” is selected.
0: Ich
1: Qch
ANA_PATH: Output Function Enable for Receiving Analog Baseband Signal
Select the output of the AOUT_P and AOUT_N pins. Normally, ANA_PATH bit should be set to “0”.
0: AOUT_P, AOUT_N pins Hi-Z
1: AOUT_P, AOUT_N pins Output Receiving Analog Baseband Signal
MAIN_PATH: Output Setting of Receiving Analog Baseband Signal
Select connection of AAF output and ADC input. Normally, MAIN_PATH bit should be set to “1”.
0: AAF Output ~ ADC Input Not Connected
1: AAF Output ~ ADC Input Connected
017003093-E-00
77
2017/3