AFE FOR CCD/CIS SIGNAL PROCESSOR
GENERAL DESCRIPTION
The samsung analog front end(AFE) for CCD/CIS
image
signal
is
an
integrated
analog
signal
processor for color image signal.
The AFE converts CCD/CIS output signal to digital
data.
The
AFE
includes
three-channel
circuit,
CDS(Correlated
Double
Sampler)
BW1222L
FEATURES
鈥?10-bit 6MSPS A/D Converter
鈥?Integrated Triple Correlated Double
Sampler
鈥?3-Channel 2 MSPS Color Mode
鈥?Analog Programmble Gain Amplifier
鈥?Internal Voltage Reference
鈥?Wide clamp level controllability for
CIS signal
鈥?No Missing Code Guaranteed
鈥?Microcontroller-Compatible Control
Interface
鈥?Operation by 3.3V Power Supply
鈥?CMOS Low Power Dissipation
PGA(Programmable Gain Amplifier), and 10-bit
analog to digital converter with reference generator.
A parallel data bus provides a simple interface to
8-bit microcontroller.
APPLICATIONS
鈥?Color and B/W Scanner
鈥?Digital Copiers
鈥?Facsimile
鈥?General Purpose CCD/CIS imager
KEY SPECIFICATION
鈥?Resolution: 10-bit
鈥?Conversion Rate: 6 MHz(2 MHz*3)
鈥?Supply Voltage: 3.3 V 鹵 5%
鈥?Power Dissipation: 250 mW(Typical)
FUNCTIONAL BLOCK DIAGRAM
RED
CDS
PGA
REF
GREEN
CDS
INPUT OFFSET
REGISTER
D[9:0]
PGA
MUX
ADC
MPU
BLUE
CDS
PGA
GAIN
REGISTER
PORT
Ver 1.4 (Oct., 1998)
No responsibility is assumed by SEC for its use nor for any infringements of patents
or other rights of third parties that may result from its use. The content of this
datasheet is subject to change without any notice.
SAMSUNG ELECTRONICS Co. LTD