AK1548 Datasheet, PDF (4/42 Pages) Asahi Kasei Microsystems – 8GHz Low Noise Integer-N Frequency Synthesizer

[AK1548]
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
“Hi-Z”
Note 1) “Power Down” means the state of [PDN]=”Low” after power on.
Note 2) The exposed pad at the center of the backside should be connected to ground.
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
MS1364-E-00
4
2012/1