AK2401 Datasheet, PDF (10/103 Pages) Asahi Kasei Microsystems – Direct Conversion Transceiver

[AK2401]
6.3. Handling of Unused Pins
Unused I/O pins must be connected appropriately.
 In the case of that PLL SYNTHESIZER is not used
No. Pin Name Type
Handling
Note
5
BIAS2
AI
Open
11 SYNVSS G Connect to VSS
12 SYNVDD P Supply Voltage
13
CPVDD
P Supply Voltage
14
CP
AO
15
SWIN
AI
16
CPZ
AI
Open

Open
Including the case of not using fast lock function
Refer to “13.7.5 Lock Detection”
Including the case of not using fast lock function
47
LD
DO
Open
Including the case of not using lock detection function
* The power must be supplied to the SYNVDD/CPVDD pin even when not using the PLL SYNTHESIZER.
* In the case of not using PLL SYNTHESIZER, RDOC can not be used. Use of an external PLL is not
recommended.
 In the case of that DAC is not used
No. Pin Name Type
Handling
Note
1 DA_SCLK DI Connect to VSS
3
DA_SDI
DI Connect to VSS
6
SMFOUT AO
Open
7
DACVDD P Supply Voltage
52
DA_FS
DI Connect to VSS
* The power must be supplied to the DACVDD pin even when not using the DAC.
 In the case of that DRIVER AMP is not used
No. Pin Name Type
Handling
Note
19 RFOUT_P AO
20 RFOUT_N AO
Open
Open
In the case of single-ended output, connect unused
pin to VDD.
21
LOVDD
P Supply Voltage
* The power must be supplied to the LOVDD pin even when not using the DRIVER AMP.
 In the case of that the corresponding function is not used
No. Pin Name Type
Handling
Note
33 AOUT_P AO
34 AOUT_N AO
42 AGC_KEEP DI
Open
Open
“L” fixed
017003093-E-00
10
2017/3