AK2401 Datasheet, PDF (8/103 Pages) Asahi Kasei Microsystems – Direct Conversion Transceiver

[AK2401]
6.2. Pin Functions
AI: Analog Input Pin, AO: Analog Output Pin, DI: Digital Input Pin, DO: Digital Output Pin,
P: Power Supply Pin, G: Ground Pin
All digital input pins must not be allowed to float.
No. Pin Name Type PD Status
Function
1 DA_SCLK DI
Hi-Z Serial Data Clock Input for D/A Converter
2
DVSS
G
-
Digital Ground for Interface Circuit.
3
DA_SDI
DI
Hi-Z D/A Converter Serial Data Input
4
TEST1
DI
100kΩ
Pull down
Test Pin. Connect to VSS.
5
BIAS2
AI
-
Resistance Pin for setting charge pump output current
6
SMFOUT AO
Hi-Z Smoothing Filter Output
7
DACVDD P
-
Analog Power Supply for D/A Converter
8
VREF1
AO
-
LDO Reference
Connect a capacitor to stabilize LDO reference voltage
9
TCXOIN
AI
27kΩ
Pull down
Reference Clock Input
10
VREF2
AO
-
Reference Voltage Pin
Connect a capacitor to stabilize reference voltage.
11 SYNVSS G
-
Analog Ground for Synthesizer
12 SYNVDD P
-
Analog Power Supply for Synthesizer
13
CPVDD
P
-
Analog Power Supply for Charge Pump
14
CP
AO
Hi-Z Charge Pump Output
15
SWIN
AI
* 1 Connect a resistor for Fast Lock
16
CPZ
AI
* 1 Connect a capacitor for Loop Filter
17 LODVDD P
-
Analog Power Supply for Local Divider and Local Buffer
18
LOIN
AI
50Ω
Pull down
Local Input
19 RFOUT_P AO Hi-Z * 2 Driver Amplifier Positive Output
20 RFOUT_N AO Hi-Z * 2 Driver Amplifier Negative Output
21
LOVDD
P
-
Analog Power Supply for Local Amplifier and Driver
Amplifier
22
VSS
G
* 3 Ground
23
DEMIN
AI
H-Z MIXER Input
24 DEMVDD P
-
Analog Power Supply for MIXER
25 LNAOUT AO Hi-Z * 2 LNA Output
26
VSS
G
* 3 Ground
27
VSS
G
* 3 Ground
28
LNAIN
AI
100kΩ
Pull down
LNA Input
29 LNACONT AI
Hi-Z LNA Matching Adjustment Pin
30
LNAVDD
P
-
Analog Power Supply for LNA
31
BIAS1
AI
Hi-Z Connect a resistor for current adjustment
32
RXVDD
P
-
Analog Power Supply for PGA, AAF and VREF
33
AOUT_P AO
Hi-Z RX Positive Analog Output
34
AOUT_N AO
Hi-Z RX Negative Analog Output
35
TEST2
DI
100kΩ
Pull down
Test Pin. Connect to VSS.
36
ADVSS
G
-
Ground for A/D converter
37
ADVDD
P
-
Analog Power Supply for A/D converter
38 VCOM_AD AO
VSS
Connect a capacitor to stabilize reference voltage for A/D
converter
017003093-E-00
8
2017/3