AK1590 Datasheet, PDF (1/36 Pages) Asahi Kasei Microsystems – 1GHz Delta-Sigma Fractional-N Frequency Synthesizer

[AK1590]
AK1590
1GHz Delta-Sigma Fractional-N Frequency Synthesizer
1. Overview
AK1590 is a Delta-Sigma Fractional-N PLL (Phase Locked Loop) frequency synthesizer with a frequency switching
function, covering a wide range of frequencies from 60 to 1000MHz. This product consists of an 18-bit Delta-Sigma
modulator, a low-noise phase frequency comparator, a highly accurate charge pump, a reference divider, dual-module
prescaler (P/P+1) and frequency offset adjustable circuits.
2. Features
 Operating frequency:
60 to 1000MHz
 Programmable charge pump current:
In a normal operating scheme, the charge pump current can be set
in 8 steps, in the range from 20 to 168μA.
In a Fast Lockup scheme, the charge pump current can be set in
8 steps, in the range from 0.8 to 2.3mA.
 Supply Voltage:
2.7 to 5.5 V (PVDD pin)
 Separate power supply for the charge pump: PVDD to 5.5V (CPVDD pin)
 On-chip power-saving features
 Frequency offset adjustable function:
No glitch operation for AFC(Automatic Frequency Control) and
DFM(Digital Frequency Modulation);
When the offset adjustable register is accessed, INT and NUM are
recalculated internally.
 General-purpose output:
Two general-purpose output ports to control peripheral parts
 Low phase noise:
-201dBc/Hz
 Low consumption current:
2.5mA typ
 Package:
24pin QFN (0.5mm pitch, 4mm4mm0.7mm)
 Operating temperature:
-40 to +85°C
MS1478-E-01
1
2013/2