描述 Description

The PLL1707 are low cost, phase-locked loop (PLL) multiclock generators. The PLL1707 and PLL1708 can generate four system clocks from a 27-MHz reference input frequency. The clock outputs of the PLL1707 can be controlled by sampling frequency-control pins and those of the PLL1708 can be controlled through serial-mode control pins. The device gives customers both cost and space savings by eliminating external components and enables customers to achieve the very low-jitter performance needed for high performance audio DACs and/or ADCs. The PLL1707 and PLL1708 are ideal for MPEG-2 applications which use a 27-MHz master clock such as DVD recorders, HDD recorders, DVD add-on cards for multimedia PCs, digital HDTV systems, and set-top boxes.

特性 Features

? 27-MHz Master Clock Input
? Generated Audio System Clock (PLL1707):
? SCKO0: 768 fS (fS = 44.1 kHz)
? SCKO1: 768 fS, 512 fS (fS = 48 kHz)
? SCKO2: 256 fS (fS = 32, 44.1, 48, 64, 88.2, 96 kHz)
? SCKO3: 384 fS (fS = 32, 44.1, 48, 64, 88.2, 96 kHz)

? Generated Audio System Clock (PLL1708):
? SCKO0: 768 fS (fS = 44.1 kHz)
? SCKO1: 768 fS, 512 fS, 384 fS , 256 fS (fS = 48 kHz)
? SCKO2: 256 fS (fS = 16, 22.05, 24, 32, 44.1, 48, 64, 88.2, 96 kHz)
? SCKO3: 384 fS (fS = 16, 22.05, 24, 32, 44.1, 48, 64, 88.2, 96 kHz)

? Zero PPM Error Output Clocks
? Low Clock Jitter: 50 ps (Typical)
? Multiple Sampling Frequencies (PLL1707):
? fS = 32, 44.1, 48, 64, 88.2, 96 kHz

? Multiple Sampling Frequencies (PLL1708):
? fS = 16, 22.05, 24, 32, 44.1, 48, 64, 88.2, 96 kHz

? 3.3-V Single Power Supply
? PLL1707: Parallel Control PLL1708: Serial Control
? Package: 20-Pin SSOP (150 mil), Lead-Free Product
? APPLICATIONS
? HDD + DVD Recorders
? DVD Recorders
? HDD Recorders
? DVD Players
? DVD Add-On Cards for Multimedia PCs
? Digital HDTV Systems
? Set-Top Boxes

The PLL1707 and PLL1708 use the same die and they are electrically identical except for mode control.