WM8148 Wolfson Microelectronics Ltd., WM8148 Datasheet - Page 8
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WM8148
Manufacturer Part Number
WM8148
Description
WM8148 : 12-BIT/12 MSPS Ccd/cis Analogue Front End/digitiser
Manufacturer
Wolfson Microelectronics Ltd.
Datasheet
1.WM8148.pdf
(43 pages)
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WM8148
INPUT VIDEO SAMPLING (INTERNAL VSMP)
Figure 2 Input Video Timing (Internal VSMP)
TEST CONDITIONS
AVDD = 4.75 to 5.25V, DVDD1 and DVDD2 = 2.97 to 5.25V, AGND = DGND = 0V, T
otherwise stated (AVDD denotes the voltage applied to all AVDD pins).
Notes: 1. t
WOLFSON MICROELECTRONICS LTD
PARAMETER
MCLK period
MCLK duty cycle
VSMP output propagation delay
SDO output propagation delay
Video level set-up time
Video level hold time
Reset level set-up time
Reset level hold time
OUTPUT
OUTPUT
2. The reset sample point may be relative to either the rising or the falling edge of MCLK, depending on the setting of
3. Parameters are measured at 50% of the rising/falling edge.
VSMP,
VIDEO
M C L K
SDO,
control bits RESREF[3:0].
VSU
and t
RSU
denote the set-up time required from when the input video signal has settled.
t
V S M P P D
t
S D O P D
t
P E R
SYMBOL
t
t
VSMPPD
SDOPD
t
t
t
PER
VSU
t
RSU
t
RH
VH
t
V S M P P D
t
S D O P D
t
TEST CONDITIONS
V S U
C
C
LOAD
LOAD
t
V H
= 10pF
= 10pF
20.8
MIN
45
10
10
10
10
A
= 0 to 70 C, MCLK = 48MHz unless
t
R S U
TYP
15
20
t
R H
MAX
55
25
35
PD Rev 4.0 April 1999
Production Data
UNITS
ns
ns
ns
ns
ns
ns
ns
%
8
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