VSP2260

VSP2260 VSP 226 0 www.ti.com CCD SIGNAL PROCESSOR for DIGITAL CAMERAS FEATURES q CCD SIGNAL PROCESSING: Correlated Double Sampling (CDS) Programmable Black Level Clamping q PROGRAMMABLE GAIN AMPLIFIER (PGA): –6dB to +42dB Gain Ranging q 10-BIT DIGITAL DATA OUTPUT: Up to 20MHz Conversion Rate No Missing Codes q 79dB SIGNAL-TO-NOISE RATIO q PORTABLE OPERATION: Low Voltage: 2.7V to 3.6V Low Power: 83mW (typ) at 3.0V Stand-By Mode: 6mW CLPDM SHP SHD SLOAD SCLK SDATA DESCRIPTION The VSP2260 is a complete mixed-signal processing IC for digital cameras, providing signal conditioning and Analog-to-Digital (A/D) conversion for the output of a CCD array. The primary CCD channel provides Correlated Double Sampling (CDS) to extract video information from the pixels, –6dB to +42dB gain range with digital control for varying illumination conditions, and black level clamping for an accurate black level reference. Input signal clamping and offset correction of the input CDS are also performed. The stable gain control is linear in dB. Additionally, the black level is quickly recovered after gain change. The VSP2260Y is available in an LQFP-48 package and operates from a single +3V/+3.3V supply. RESET ADCCK DRVDD VCC Serial Interface Input Clamp Timing Control CCDIN Correlated Double Sampling (CDS) Programmable Gain Amplifier (PGA) –6dB to +42dB AnalogtoDigital Converter Output Latch 10-Bit Digital Output B[9:0] CCD Output Signal Preblanking Optical Black (OB) Level Clamping Re...