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WM8148

Features: · Correlated double sampling· Programmable gain amplifier· Programmable input clamp voltage· Offset correction· 12-bit, 12MSPS ADC· Internal voltage reference· 12-bit or 8+4 bit data output mode· Single 5V supply or 5V analogue/3.3V digital supply· Programmable sample timing· Control int...

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SeekIC No. : 004546132 Detail

WM8148: Features: · Correlated double sampling· Programmable gain amplifier· Programmable input clamp voltage· Offset correction· 12-bit, 12MSPS ADC· Internal voltage reference· 12-bit or 8+4 bit data outpu...

WM8148 Data Sheet

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Part Number:
WM8148
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
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Product Details

Description



Features:

· Correlated double sampling
· Programmable gain amplifier
· Programmable input clamp voltage
· Offset correction
· 12-bit, 12MSPS ADC
· Internal voltage reference
· 12-bit or 8+4 bit data output mode
· Single 5V supply or 5V analogue/3.3V digital supply
· Programmable sample timing
· Control interface compatible with previous WolfsonAFEs
· 48-pin TQFP package


Application

· Flatbed scanners
· Document scanners
· Multi-function peripherals (MFPs)
· Colour copiers
· Character recognition systems
· Linear array CCDs
· Contact image sensors (CIS)


Pinout

Connection Diagram


Specifications

CONDITION MIN MAX
Analogue supply voltages: AVDD1 - 4 GND - 0.3V GND + 7V
Digital supply voltages: DVDD1 - 2 GND - 0.3V GND + 7V
Digital grounds: DGND1 - 4 GND - 0.3V GND + 0.3V
Analogue grounds: AGND1 - 5 GND - 0.3V GND + 0.3V
Digital inputs and SDO GND - 0.3V DVDD1 + 0.3V
Digital outputs (not SDO) GND - 0.3V DVDD2 + 0.3V
Digital IO pins GND - 0.3V DVDD2 + 0.3V
RINP, GINP, BINP GND - 0.3V AVDD + 0.3V
Other pins GND - 0.3V AVDD + 0.3V
     
Operating temperature range: TA 0°C +70°C
Storage temperature -50°C +150°C
Lead temperature (soldering, 10 seconds)   +260°C
Lead temperature (soldering, 2 minutes)   +183°C



Description

The WM8148 is a 12-bit, 12MSPS analogue front end/digitiser IC, which interfaces to colour or monochrome lineararray CCDs or contact image sensors (CIS). The deviceincludes all the signal conditioning circuitry required toprocess the analogue signals from the CCD or CIS prior tothe internal ADC.


Three signal-processing channels of the WM8148 are included in thedevice. Each channel features reset level clamping,correlated double sampling (CDS), offset correction andprogrammable gain amplification (PGA). The output signalfrom each channel is then multiplexed into a highperformance 12-bit analogue to digital converter (ADC).The reset level clamp and/or CDS functions can be selectedor bypassed depending on the application.


The WM8148 can be operated in several modes. Theoperational mode of the device, including the samplingscheme and power management is programmed via theserial/parallel control interface.


Output data of the WM8148 is presented in either 12-bit parallel or bytewide(8+4-bit) format.




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