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TLC8044

Features: ` Color or Gray Scale Operation` Signals Processed in the Digital Domain` Differential RGB Input Multiplexer` Three 8-bit DACs for CCD Offset Level Shifting With Bipolar Correction Range` Two Sampling Modes: DAC Referenced Correlated Double Sampling (CDS)` 12-Bit ADC with 6 MSPS Op...

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SeekIC No. : 004520738 Detail

TLC8044: Features: ` Color or Gray Scale Operation` Signals Processed in the Digital Domain` Differential RGB Input Multiplexer` Three 8-bit DACs for CCD Offset Level Shifting With Bipolar Correction Ran...

TLC8044 Data Sheet

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Part Number:
TLC8044
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Color or Gray Scale Operation
` Signals Processed in the Digital Domain
` Differential RGB Input Multiplexer
` Three 8-bit DACs for CCD Offset Level
  Shifting With Bipolar Correction Range
` Two Sampling Modes:
DAC Referenced
Correlated Double Sampling (CDS)
` 12-Bit ADC with 6 MSPS Operation
` Digital dc Restoration
` Pixel-By-Pixel Offset and Shading (Gain)
  Compensation
` Global Gain Adjust for Each Color (Channel)
` Compatible with 600 dpi CCD Image Sensors
` Global Offset Adjust for Each Color (Channel)
` Output Word Length Programmable to 8,
  10, 12, or 16 Bits
` Programmable Threshold Detector for Each
  Color (Channel)
` Dual Internal Default Registers for
  Even/Odd Pixel Offset Correction
` 68-Terminal PLCC Package


Application

 Handy Scanners
 Flatbed Scanners


Pinout

Connection Diagram


Specifications

Supply voltage, DVDD1, DVDD2, AVDD, VDD (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7 V
Digital inputs (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VDD + 0.3 V
Analog inputs (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VCC + 0.3 V
Digital outputs, maximum external voltage applied (see Note 1) . . . . . . . . . . . . . . . . . . 0.3 V to VCC + 0.3 V
Reference input (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0.3 V to VDD + 0.3 V
Operating temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50°C to 150°C
Lead temperature, soldering, 10 sec . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: Voltages applied to DVDD1 and DVDD2 are measured with respect to the DGND terminal. AVDD is measured with respect to the AGND
terminal. For the following specifications, unless otherwise noted, AGND and DGND are tied togather (and represent 0 volts) and are
referred to simply as GND. When the voltages applied to DVDD1, DVDD2, and AVDD are equal, they are referred to simply as VDD, unless
otherwise noted.


Description

The TLC8044 is a 12-bit analog-to-digital interface subsystem for charge-coupled device (CCD) image sensors and scanners. An input multiplexer allows color operation with a single on-chip 12-bit ADC. The TLC8044 uses DSP circuits to correct for nonideal CCD image sensor and scanning system characteristics. Cost effective gray scale operation is obtained using a single multiplexer input. The TLC8044 three-channel input multiplexer and sampling function has two basic modes of operation: normal sampling and correlated double sampling. The internal sample and hold allows all three channels to be sampled simultaneously in color operation. Three DACs (8 bits + sign) are provided to allow bipolar adjustment of the dc level of the signal at the ADC input. Digital dc restoration is provided following the ADC. Variations in offset and luminance across a scan are dynamically corrected on a pixel-by-pixel basis, using calibration data provided by an external data store. Provisions are made for global adjustments of gain, contrast and color balance, and offset for brightness. The output word length can be programmed to 8, 10, 12, or 16 bits, and a programmable threshold detector is provided for use during calibration and OCR applications. The TLC8044 is characterized for operation from 0°C to 70°C.




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