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WM8196SCDS 参数 Datasheet PDF下载

WM8196SCDS图片预览
型号: WM8196SCDS
PDF下载: 下载PDF文件 查看货源
内容描述: (8 + 8)位输出16位CIS / CCD AFE /数字转换器 [(8 + 8) Bit Output 16-bit CIS/CCD AFE/Digitiser]
分类和应用: 转换器光电二极管
文件页数/大小: 32 页 / 364 K
品牌: WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
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DESCRIPTION
The WM8196 is a 16-bit analogue front end/digitiser IC
which processes and digitises the analogue output signals
from CCD sensors or Contact Image Sensors (CIS) at pixel
sample rates of up to 12MSPS.
The device includes three analogue signal processing
channels each of which contains Reset Level Clamping,
Correlated Double Sampling and Programmable Gain and
Offset adjust functions. Three multiplexers allow single
channel processing. The output from each of these
channels is time multiplexed into a single high-speed 16-bit
Analogue to Digital Converter. The digital output data is
available in 8 or 4-bit wide multiplexed format.
An internal 4-bit DAC is supplied for internal reference level
generation. This may be used during CDS to reference CIS
signals or during Reset Level Clamping to clamp CCD
signals. An external reference level may also be supplied.
ADC references are generated internally, ensuring optimum
performance from the device.
Using an analogue supply voltage of 5V and a digital
interface supply of either 5V or 3.3V, the WM8196 typically
only consumes 300mW when operating from a single
5V supply.
WM8196
(8 + 8) Bit Output 16-bit CIS/CCD AFE/Digitiser
FEATURES
16-bit ADC
12MSPS conversion rate
Low power – 320mW typical
5V single supply or 5V/3.3V dual supply operation
Single or 3 channel operation
Correlated double sampling
Programmable gain (8-bit resolution)
Programmable offset adjust (8-bit resolution)
Programmable clamp voltage
8 or 4-bit wide multiplexed data output formats
Internally generated voltage references
28-lead SSOP package
Serial control interface
APPLICATIONS
Flatbed and sheetfeed scanners
USB compatible scanners
Multi-function peripherals
High-performance CCD sensor interface
BLOCK DIAGRAM
VRLC/VBIAS
VSMP
MCLK
AVDD
DVDD1 DVDD2
VRT VRX VRB
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CL
R
S
V
S
TIMING CONTROL
R
G
B
M
U
X
8
WM8196
VREF/BIAS
OFFSET
DAC
+
PGA
8
OEB
+
I/P SIGNAL
POLARITY
ADJUST
M
U
X
16-
BIT
ADC
DATA
I/O
PORT
OP[0]
OP[1]
OP[2]
OP[3]
OP[4]
OP[5]
OP[6]
OP[7]/SDO
RINP
RLC
M
U
X
CDS
R
G
B
M
U
X
GINP
RLC
CDS
8
+
OFFSET
DAC
PGA
8
+
I/P SIGNAL
POLARITY
ADJUST
BINP
RLC
CDS
8
+
OFFSET
DAC
PGA
8
+
I/P SIGNAL
POLARITY
ADJUST
RLC
DAC
4
CONFIGURABLE
SERIAL
CONTROL
INTERFACE
SEN
SCK
SDI
RLC/ACYC
AGND1
AGND2
DGND
WOLFSON MICROELECTRONICS plc
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Production Data, March 2007, Rev 4.3
Copyright
©2007
Wolfson Microelectronics plc