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WM8143-12CFT/V Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8143-12CFT/V Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 24 page  WM8143-12 12-bit/4MSPS CCD Signal Processor Production Data Nov. 1999 Rev 4 Production Data datasheets contain final specifications current on publication date. Supply of products conforms to Wolfson Microelectronics' terms and conditions. Wolfson Microelectronics Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK Tel: +44 (0) 131 667 9386 Fax +44 (0) 131 667 5176 email: sales@wolfson.co.uk www: http://www.wolfson.co.uk ©1999 Wolfson Microelectronics Ltd. Description The WM8143-12 integrates the analogue signal conditioning required by CCD sensors with a 12-bit ADC. The WM8143-12 requires minimal external circuitry and provides a cost-effective sensor to digital domain system solution. Each of the three analogue conditioning channels includes reset level clamp, CDS, fine offset level shifting and programmable gain amplification. The three channels are multiplexed into the ADC. The output from the ADC is fed to the output bus pins OP[11:0] via a 12/8 bit multiplexer, enabled by the OEB signal. The flexible output architecture allows twelve-bit data to be accessed either on a twelve-bit bus or via a time- multiplexed eight-bit bus. The WM8143-12 can be configured for pixel-by-pixel or line-by-line multiplexing operation. Reset level clamp and/or CDS features can be optionally bypassed. The device configuration is programmed either via a simple serial interface or via an eight-bit parallel interface. The serial/parallel interfaces of the WM8143-12 are control compatible with those of the WM8144-10 and WM8144-12. Features • Reset level clamp • Correlated double sampling (CDS) • Fine offset level shifting • Programmable gain amplification • 12-bit ADC with maximum 4 MSPS • Simple clocking scheme • Control by serial or parallel interface • Time multiplexed eight-bit data output mode • 32 pin TQFP package • Interface compatible with WM8144-10 and WM8144-12 Applications • Flatbed scanners • Sheet feed scanners • Film scanners • CCD sensor interfaces • Contact image sensor (CIS) interfaces Block Diagram + + OFFSET + + + + M U X RINP GINP BINP TIMING CONTROL VSMP MCLK RLC DGND DVDD AVDD 12-bit ADC 12/8 MUX CONFIGURABLE SERIAL/PARALLEL CONTROL INTERFACE SDI / DNA SCK / RNW SEN / STB NRESET OEB MUX VMID VRLC VRU VRT VRB VMID CL RS VS AGND WM8143-12 VMID OFFSET OFFSET OP[11:0] PGA PGA 5-BIT REG CDS 5-BIT REG 5-BIT REG PGA VMID VMID CDS CDS S/H S/H S/H S/H S/H S/H 8-BIT + SIGN DAC 8-BIT + SIGN DAC 8-BIT + SIGN DAC |
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