參數(shù)資料
型號(hào): TVP3026-220APCE
廠商: Texas Instruments, Inc.
英文描述: Video Interface Palette
中文描述: 視頻接口面板
文件頁(yè)數(shù): 101/107頁(yè)
文件大?。?/td> 513K
代理商: TVP3026-220APCE
E–1
Appendix E
Crystal Selection
This section provides typical crystal specifications for the reference crystal used with the TVP3026. The
recommended reference frequency is the common 14.31818 MHz. The hard-wired VGA frequencies
assume this reference frequency. Other reference frequencies can be used as indicated below, but the VGA
frequencies will be incorrect.
The specifications below are commonly specified by crystal manufacturers. Frequency calibration tolerance
is a measurement of how close the mean output frequency is to the target frequency. The accuracy of this
parameter is not critical in video display systems. Small errors in the mean frequency are undetectable on
the display, but
.
produce slight changes in the horizontal and vertical scan rates.
The oscillator circuit in the TVP3026 is of the pierce oscillator type and is therefore designed for a
parallel-resonant crystal. For the TVP3026A, a series resonant crystal is also acceptable, but results in a
250–500 ppm increase in mean frequency. For the TVP3026B, use of a series-resonant crystal will not result
in an increase in mean frequency.
Frequency stability is a critical factor for video display systems. This is a measurement of frequency
deviations about the mean (jitter). Frequency stability determines the degree to which the crystal contributes
to on-screen jitter.
Table E–1. Typical Crystal Specifications
PARAMETER
MIN
TYP
MAX
UNITS
Frequency
14.31818
MHz
Frequency calibration tolerance
1%
Frequency stability
50
ppm
Equivalent series resistance
35
相關(guān)PDF資料
PDF描述
TVP3026-220BMDN Video Interface Palette
TVP3026-250AMDN Video Interface Palette
TVP3026-250APCE Video Interface Palette
TVP3026-250BMDN Video Interface Palette
TVP3026-135AMDN Video Interface Palette
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TVP3026-220BMDN 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette
TVP3026-220BPCE 制造商:Rochester Electronics LLC 功能描述:- Bulk
TVP3026-220MDN 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video DAC with Color Palette (RAMDAC)
TVP3026-220PCE 制造商:Rochester Electronics LLC 功能描述:- Bulk
TVP3026-230CPCE 制造商:Rochester Electronics LLC 功能描述:- Bulk