Document
LM9822 3 Channel 42-Bit Color Scanner Analog Front End
May 1999
N
LM9822 3 Channel 42-Bit Color Scanner Analog Front End
General Description
The LM9822 is a high performance Analog Front End (AFE) for image sensor processing systems. It performs all the analog and mixed signal functions (correlated double sampling, color specific gain and offset correction, and analog to digital conversion) necessary to digitize the output of a wide variety of CIS and CCD sensors. The LM9822 has a 14 bit 6MHz ADC.
Key Specifications
• Output Data Resolution • Pixel Conversion Rate • Analog Supply Voltage • I/O Supply Voltage • Power Dissipation (typical)
14 Bits 6MHz 5V±5% 3.3V±10% or 5V±5% 375mW
Features
• 6 million pixels/s conversion rate • Digitally programmed gain and offset for red, green and blue
color balancing
• Correlated Double Sampling for lowest noise from CCD
sensors
• Compatible with CCD and CIS type image sensors • InternalVoltage Reference Generation • TT.