AK1546 Datasheet, PDF (4/39 Pages) Asahi Kasei Microsystems – 3GHz Low Noise Integer-N Frequency Synthesizer

[AK1546]
4. Pin Functional Description and Assignments
1. Pin Functions
No. Name I/O
Pin Functions
1 CPVSS G Charge pump ground
2 TEST1 DI Test pin 1
3 AVSS G Analog ground
4 RFINN AI Complementary input to the RF Prescaler
5 RFINP AI Input to the RF Prescaler
6 AVDD P Power supply for analog blocks
7 VREF1 AO Connect reference voltage capacitor for LDO
8 REFIN AI Reference signal input
9 PVSS G Peripherals ground
10 TEST2 DI Test pin 2
11 PDN DI Power down
12 CLK DI Serial clock input
13 DATA DI Serial data input
14
LE
DI Load enable input
15
LD
DO Lock detect output
16 PVDD P Power supply for peripherals
17 VREF2 AO Connect reference voltage capacitor
18 CPVDD P Power supply for charge pump
19 BIAS AIO Resistance pin for setting charge pump current
20
CP
AO Charge pump output
Power down
(Note 1)
Remarks
Internal pull-down,
Schmidt trigger input
“Low”
“Low”
“Low”
Internal pull-down,
Schmidt trigger input
Schmidt trigger input
Schmidt trigger input
Schmidt trigger input
Schmidt trigger input
“Hi-Z”
Note 1) “Power Down” means the state of [PDN]=”Low” after power on.
The following table shows the meaning of abbreviations used in the “I/O” column.
AI: Analog input pin
AO: Analog output pin AIO: Analog I/O pin DI: Digital input pin
DO: Digital output pin P: Power supply pin
G: Ground pin
MS1388-E-00
4
2012/3