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Features
+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
Description The LM98501 is a CCD signal processor for electronic cameras. The processor provides a common interface to a number 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.
Key Specification
| ■ Maximum Input Level
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1.0V peak-peak
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| ■ CDS Sampling Rate
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27 MSPS
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| ■ PGA Gain Steps
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256 Steps
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| ■ PGA Gain Range
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0.0 dB-32.0 dB
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| ■ ADC Resolution
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10-Bit
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| ■ ADC Sampling Rate
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27 MSPS
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| ■ *Signal-to-Noise Ratio
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68 dB @ 0 dB Gain, 1.0V Input
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| ■ Power Dissipation
AV+ = DV+ = DV+ I/O = 3.0V
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195 mW (typical)
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| ■ Operating Temperature
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0°C to 70°C
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*20 log10 (VIN/RMS Output Noise)
Applications
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
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