WM8144-12

Analogue Supply Voltage . AGND - 0.3 V, AGND +7 V
Digital Supply Voltage. . . . DGND - 0.3 V, DGND +7 V
Digital Inputs . . . . . . . . .DGND - 0.3 V, DVDD + 0.3 V
Digital Outputs. . . . . . . .DGND - 0.3 V, DVDD + 0.3 V
Reference inputs . . . . . . AGND - 0.3 V, AVDD + 0.3 V
RINP, GINP, BINP . . . . . . AGND - 0.3 V, AVDD + 0.3 V
Operating temperature range, TA . .. . 0oC to +70oC
Storage Temperature . . . . . . . . . . -50oC to +150oC
Lead Temperature (soldering, 10 sec) .  . . . +260oC

WM8144-12 integrates the analogue signal conditioning required by CCD sensors with a 12-bit ADC and optional pixel-by-pixel image compensation. WM8144-12 requires minimal external circuitry and provides a cost effective sensor-to-digital domain system solution.

Each analogue conditioning channel provides reset level clamp, CDS, fine offset level shifting and gain amplification. The three channels are multiplexed into the ADC. Output from the ADC can either be direct or passed through a digital post-processing function. The postprocessing provides compensation for variations in offset and shading on a pixel-by-pixel basis.

The flexible output architecture of the WM8144-12 allows twelve-bit data to be accessed either on a twelve-bit bus or via a timemultiplexed eight-bit bus. The WM8144-12 can be configured for pixel-by-pixel or line-by-line multiplexing operation. Reset level clamp and/or CDS features can be optionally bypassed. Device configuration is either by a simple serial or eight-bit parallel interface.