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WM8144-10CFT/V Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8144-10CFT/V Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 27 page  Lutton Court, Bernard Terrace, Edinburgh EH8 9NX, UK Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176 email: admin@wolfson.co.uk www: http://www.wolfson.co.uk Wolfson Microelectronics © 1997 Wolfson Microelectronics WM8144-10 Production Data October 1997 Rev. 3.0 Integrated 10-bit Data Acquisition system for Imaging Applications Description WM8144-10 integrates the analogue signal conditioning required by CCD sensors with a 10-bit ADC and optional pixel-by-pixel image compensation. WM8144-10 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 post- processing provides compensation for variations in offset and shading on a pixel-by-pixel basis. The flexible output architecture allows ten-bit data to be accessed either on a ten-bit bus or via a time-multiplexed eight-bit bus. The WM8144-10 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. Features Block Diagram • Reset level clamp • Correlated Double Sampling (CDS) • Fine offset level shifting • Programmable Gain Amplification • 10-Bit ADC with maximum 6 MSPS • Digital post-processing for pixel-by-pixel image compensation • Simple clocking scheme • Control by serial or parallel interface • Time-multiplexed eight-bit data output mode • 48 pin TQFP package • Pin compatible with WM8144-12 Applications • Document scanners • CCD sensor interfaces • Contact image sensor (CIS) interfaces Production Data data sheets contain fi- nal specifications current on publication date. Supply of products conforms to Wolfson Microelectronics standard terms and conditions VSMP MCLK RLC 10 BIT ADC IMAGE COMPENSATION PROCESSING EXTERNAL DATA STORE INTERFACE 10/8 MUX CONFIGURABLE SERIAL/PARALLEL CONTROL INTERFACE VRU VRT VRB MUX M U X VRL VMID VMID OP[9:0] ORNG CDATA(7:0) DV CC[2:0] SDI / DNA PNS SCK / RNW SEN / STB OEB VRLC AVDD AGND DVDD1 DVDD2 DGND TIMING CONTROL NRESET S/H RINP CDS CDS CDS S/H S/H GINP S/H S/H BINP S/H WM8144-10 VS RS CL 8-BIT + SIGN DAC OFFSET OFFSET OFFSET PGA 5-BIT REG VMID 8-BIT + SIGN DAC PGA 5-BIT REG VMID 8-BIT + SIGN DAC PGA 5-BIT REG VMID |
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