LM9810/20 10/12-Bit Image Sensor Processor Analog Front End
July 1998
N
General Description
LM9810/20 10/12-Bit Image Sensor Processor Analog Front End
The 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.
Features
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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
Pixel Conversion Rate
Supply Voltage
Power Dissipation
10/12 Bits
6MHz
5V鹵5%
300mW
Applications
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Color Flatbed Document Scanners
Color Sheetfed Scanners
Multifunction Imaging Products
Digital Copiers
General Purpose Linear CCD Imaging
Connection Diagrams
V
REF-
V
REFMID
V
REF+
RefBypass
OS
R
OS
G
OS
B
AGND
VA
SampCLK
1
2
3
4
5
6
7
8
9
10
LM9810
&
LM9820
20
19
18
17
16
15
14
13
12
11
DGND
VD
MCLK
D5
D4
D3
D2 (SCLK)
D1 (Latch)
D0 (SDI)
NewLine
Ordering Information
Commercial (0擄C
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T
A
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+70擄C)
LM9810CCWM
LM9810CCWMX
LM9820CCWM
LM9820CCWMX
Package
20 Pin Wide SOIC
20 Pin Wide SOIC, Tape & Reel
20 Pin Wide SOIC
20 Pin Wide SOIC, Tape & Reel
TRI-STATE廬 is a registered trademark of National Semiconductor Corporation.
漏1997,1998 National Semiconductor Corporation
1
http://www.national.com
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