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LM98501CCVBH Datasheet

  • LM98501CCVBH

  • 10-Bit, 27 MSPS Camera Signal Processor

  • 493.29KB

  • 24頁(yè)

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LM98501 10-Bit, 27 MSPS Camera Signal Processor
February 2000
LM98501
10-Bit, 27 MSPS Camera Signal Processor
General Description
The LM98501 is a CCD signal processor for electronic cam-
eras. The processor provides a common interface to a num-
ber of different image sensors including CCD, CMOS, and
CIS. Correlated double sampling reduces kTC noise from
the image signal. A fast, temperature stable, 8-bit digitally
programmable
gain
amplifier
enables
pixel-rate
white-balancing. An auxiliary input is provided, allowing for
the selection of an external signal, useful for electronic titling
and video overlay. The 10-bit A/D converter preserves the
image quality with excellent noise performance. The
LM98501 also includes the supporting functions of digital
black level clamp and power down, ideally suited for portable
video applications. This low-power processor is a natural
choice for the most demanding imaging systems.
Features
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+3V single power supply
Low power CMOS design
4-wire serial interface
2.5V data output voltage swing
No missing codes
AUX input with input clamp and programmable gain
Four color gain and offset registers
Digital black level clamp
Small 48-lead LQFP package
Key Specifications
j
Maximum Input Level
j
CDS Sampling Rate
j
PGA Gain Steps
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PGA Gain Range
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ADC Resolution
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ADC Sampling Rate
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*Signal-to-Noise Ratio
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Power Dissipation
Applications
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Digital still camera
Digital video camcorder
Video conferencing
Security camera
Plain paper copier
Flatbed or handheld color scanner
Video processing for x-ray or infrared
Barcode scanner
1.0V peak-peak
27 MSPS
256 Steps
0.0 dB-32.0 dB
10-Bit
27 MSPS
60 dB 0 dB Gain, 1.0V Input
195 mW (typical)
0藲C to 70藲C
AV+ = DV+ = DV+ I/O = 3.0V
j
Operating Temperature
*
20 log
10
(V
IN
/RMS Output Noise)
Typical Digital Camera Block Diagram
DS101292-1
漏 2000 National Semiconductor Corporation
DS101292
www.national.com

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