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WM8148 Datasheet(PDF) 7 Page - Wolfson Microelectronics plc

Part # WM8148
Description  12-bit/12MSPS CCD/CIS Analogue Front End/Digitiser
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8148 Datasheet(HTML) 7 Page - Wolfson Microelectronics plc

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WM8148
Production Data
WOLFSON MICROELECTRONICS LTD
PD Rev 4.0 April 1999
7
INPUT VIDEO SAMPLING (EXTERNAL VSMP)
MCLK
VSMP
INPUT
VIDEO
t
PER
t
VSMPSU
t
VSMPH
t
VSU
t
VH
t
RSU
t
RH
Figure 1 Input Video Timing (External VSMP)
TEST CONDITIONS
AVDD = 4.75 to 5.25V, DVDD1 and DVDD2 = 2.97 to 5.25V, AGND = DGND = 0V, TA = 0 to 70
°C, MCLK = 48MHz unless
otherwise stated (AVDD denotes the voltage applied to all AVDD pins).
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
MCLK period
(dependent on mode selected)
tPER
20.8
ns
MCLK duty cycle
45
55
%
VSMP set-up time
tVSMPSU
2ns
VSMP hold time
tVSMPH
5ns
Video level set-up time
tVSU
10
ns
Video level hold time
tVH
10
ns
Reset level set-up time
tRSU
10
ns
Reset level hold time
tRH
10
ns
Notes: 1.
tVSU and tRSU denote the set-up time required from when the input video signal has settled.
2.
The reset sample point may be relative to either the rising or the falling edge of MCLK, depending on the setting of
control bits RESREF[3:0].
3.
Parameters are measured at 50% of the rising/falling edge.


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