參數(shù)資料
型號: SM320VC33HFGM150
廠商: TEXAS INSTRUMENTS INC
元件分類: 數(shù)字信號處理
英文描述: 32-BIT, 75 MHz, OTHER DSP, CQFP164
封裝: NCTB, CERAMIC, MO-113AA, QFP-164
文件頁數(shù): 19/56頁
文件大小: 669K
代理商: SM320VC33HFGM150
SM320VC33, SMJ320VC33
DIGITAL SIGNAL PROCESSOR
SGUS034E - FEBRUARY 2001 - REVISED OCTOBER 2002
26
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251-1443
phase-locked loop (PLL) circuit timing
phase-locked loop characteristics using EXTCLK or on-chip crystal oscillator
PARAMETER
MIN
MAX
UNIT
Fpllin
Frequency range, PLL input
5*
15*
MHz
Fpllout
Frequency range, PLL output
25*
75*
MHz
Ipll
PLL current, CVDD supply
2*
mA
Ppll
PLL power, CVDD supply
5*
mW
PLLdc
PLL output duty cycle at H1
45*
55*
%
PLLJ
PLL output jitter, Fpllout = 25 MHz
400*
ps
PLLLOCK
PLL lock time in input cycles
1000
cycles
* Not production tested
Duty cycle is defined as 100*t1/(t1+t2)%
To ensure clean internal clock references, the minimal low and high pulse durations must be maintained. At high
frequencies, this may require a fast rise and fall time as well as a tightly controlled duty cycle. At lower
frequencies, these requirements are less restrictive when in x1 and x0.5 modes. The PLL, however, must have
an input duty cycle of between 40% and 60% for proper operation.
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