參數(shù)資料
型號: WM8199
廠商: Wolfson Microelectronics
英文描述: 20MSPS 16-bit CCD Digitiser
中文描述: 20MSPS 16位數(shù)字化儀防治荒漠化公約
文件頁數(shù): 9/30頁
文件大小: 358K
代理商: WM8199
WM8199
Production Data
w
PD Rev 3.2 November 2003
9
INPUT VIDEO SAMPLING
MCLK
VSMP
INPUT
VIDEO
t
PER
t
VSMPSU
t
VSMPH
t
VSU
t
VH
t
RSU
t
RH
t
MCLKL
t
MCLKH
Figure 3 Input Video Timing
Note:
1.
See Page 14 (Programmable VSMP Detect Circuit) for video sampling description.
Test Conditions
AVDD = DVDD1 = 5.0V, DVDD2 = 3.3V, AGND = DGND = 0V, T
A
= 25
°
C unless otherwise stated.
PARAMETER
MCLK period
SYMBOL
t
PER
TEST CONDITIONS
MIN
25
TYP
MAX
UNITS
ns
MCLK high period
t
MCLKH
11.3
14.1
ns
MCLK low period
t
MCLKL
11.3
14.1
ns
VSMP set-up time
t
VSMPSU
5
ns
VSMP hold time
t
VSMPH
3
ns
Video level set-up time
t
VSU
11
ns
Video level hold time
t
VH
4
ns
Reset level set-up time
t
RSU
11
ns
Reset level hold time
t
RH
4
ns
Notes:
1.
2.
t
VSU
and t
RSU
denote the set-up time required after the input video signal has settled.
Parameters are measured at 50% of the rising/falling edge.
OUTPUT DATA TIMING
MCLK
OP[7:0]
t
PD
Figure 4 Output Data Timing
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