LM9820CCWMX ,LM9810/20 10/12-Bit Image Sensor Processor Analog Front EndBlock DiagramMCLKSampCLKOSADC ClockR10/12 bit6MM 0 to 2V6MHzU D5-D0Samplerx3 UOS PGAGXADCVSIG XOSBD ..
LM9820CCWMX ,LM9810/20 10/12-Bit Image Sensor Processor Analog Front EndGeneral DescriptionThe LM9810 and LM9820 are high performance Analog Front
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LM9810CCWM-LM9820CCWM-LM9820CCWMX
LM9810/20 10/12-Bit Image Sensor Processor Analog Front End
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General DescriptionThe LM9810 and LM9820 are high performance Analog Front
Ends (AFEs) for image sensor processing systems. The
LM9810/20 performs all the analog and mixed signal functions
(correlated double sampling, color specific gain and offset cor-
rection, and analog to digital conversion) necessary to digitize
the output of a wide variety of CIS and CCD sensors. The
LM9810 has a 10 bit 6MHz ADC, and the LM9820 has a 12 bit
6MHz ADC. The LM9810 and LM9820 are pin-for-pin and func-
tionally compatible.
Applications Color Flatbed Document Scanners Color Sheetfed Scanners Multifunction Imaging Products Digital Copiers General Purpose Linear CCD Imaging
Features 6 million pixels/s conversion rate Digitally programmed gain and offset for red, green and blue
pixels Correlated Double Sampling for lowest noise TTL/CMOS input/output compatible
Key Specifications Output Data Resolution 10/12 Bits Pixel Conversion Rate 6MHz Supply Voltage 5V±5% Power Dissipation 300mW
LM9810/20 10/12-Bit Image Sensor Processor Analog Front End
Connection DiagramsVREF+
OSR
RefBypass
VREFMID
VREF-
OSG
SampCLK
AGND
OSB
LM9810
LM9820DGND
MCLK
D2 (SCLK)
D1 (Latch)
D0 (SDI)
NewLine111
Ordering Information
Commercial (0°C ≤ TA ≤ +70°C) PackageLM9810CCWM
LM9810CCWMX
LM9820CCWM
LM9820CCWMX
20 Pin Wide SOIC
20 Pin Wide SOIC, Tape & Reel
20 Pin Wide SOIC
20 Pin Wide SOIC, Tape & Reel
July 1998
LM9810
/20 10/
12-Bi
t Imag
oces
sor An
og
Fro
t End©1997,1998 National Semiconductor Corporation
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
