WM8148 Wolfson Microelectronics Ltd., WM8148 Datasheet - Page 14

• Manufacturer Part Number: WM8148
• Description: WM8148 : 12-BIT/12 MSPS Ccd/cis Analogue Front End/digitiser
• Manufacturer: Wolfson Microelectronics Ltd.

WM8148
SYSTEM INFORMATION
WOLFSON MICROELECTRONICS LTD
Figure 13 shows a system block diagram for a typical application. The CCD image sensor contains
three parallel linear arrays of sensor elements (sensitive to Red, Green, and Blue light respectively).
The Red, Green and Blue output signals are each applied to the RINP, GINP and BINP channel inputs
respectively of the WM8148. Each of these channels provide gain adjust, for compensation of sensor
sensitivity and offset adjust for nulling out d.c. offset voltages. The outputs of these three channels are
time multiplexed into a single 12-bit resolution ADC. The digital output is then transferred to a digital
ASIC or other digital processor. The corrected data can then be compressed if required before being
output to a data storage device or a monitor.
Figure 13 System Diagram
O
S
E
N
S
R
R
G
B
B U F F E R
B U F F E R
B U F F E R
S E N S O R T I M I N G
R I N P
G I N P
B I N P
WM8148
C O N T R O L I / F
C L O C K S
D A T A
PD Rev 4.0 April 1999
S Y S T E M
Production Data
ASIC
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