Inside

• ADCs enable single chip solution from CCD output to digital domain
• New CD-based "Designer's Guide and Data Book" allow for powerful searches
• TI offers high-preformance total graphics solultion
• Programmable dual DACs let designers trade power for speed
• 10-Bit, 20 MSPS ADC provides high resolution and speed with 33% power savings
• Plug-N-Play platform provides easy evaluation of all TI audio power amplifiers
• 6 W stereo audio power amplifier in PowerPAD^TM package
• Three channel 1.75 W stereo audio power amplifier
• Fully integrated single channel PCMCIA power distribution switch
• High-speed 132 MBps PCI-to-PCI bridge
• RS-485 transceiver with integrated protection
• New amplifiers data book now available

ADCs enable single chip solution from CCD output to digital domain

Product Features

• 12-Bit or 10-Bit Operation
• 3 independent PGAs (TLC8144)
• Economical color and gray scale operation
• CDS, sample & hold modes
• Pixel-by Pixel digital compensation
• 400 mW power dissipation
• Characterized for operation from 0°C to 70°C

The TLC8044 and TLC8144 are analog-to-digital converters designed to digitize and compensate the analog output of CCD image sensors at resolutions as high as 12-bits. These versatile ADCs will operate in correlated double sample (CDS) mode, and in sample and hold mode. This makes them compatible with many CCD imager applications such as hand-held or flatbed scanner designs and contact image sensor (CIS) designs.

The TLC8044 and TLC8144 both feature separate RGB inputs, bipolar analog signal offset correction, and a 3-to-1 RGB analog MUX. In addition, the internal sample and hold circuitry allows them to handle both color and gray-scale operations.

The TLC8044 features a fully differential analog signal path and has a 12-bit, 6-MSPS analog-to-digital converter that will support up to 36-bit color designs. The TLC8044 also affords the designer the option of using pixel-by-pixel digital correction circuitry, six internal offset correction registers (red, green, blue, even and odd pixels), and three internal registers to correct pixel shading. For global error correction, the TLC8044 offers both global offset and global gain adjustment for each color channel.

The TLC8144 uses a single-ended analog signal path that includes 3 independent analog programmable gain amplifiers (PGA's) and a 10-bit 6-MSPS analog-to-digital converter that will support up to 30-bit color. The TLC8144 is able to perform pixel-by-pixel compensation of pixel response non-uniformity (PRNU) using data that is stored externally. Alternatively the designer has the option of bypassing this step. The output of the A/D can be passed directly to the controlling processor.

This entire family of CCD interface devices features an easy interface to a host processor. The TLC8044 has a programmable output word length of 8,10,12, or 16 bits, a separate programmable threshold detect output for each color (for OCR operations), and a three wire serial input bus that sets all global and default correction values. The TLC8144 also incorporates interface flexibility. It features a flexible output architecture that allows the 10-bit output data to be accessed by either a 10-bit bus or via a time-multiplexed 8-bit bus. The TLC8144 is the internal sample and hold circuitry allows them to handle both color and gray-scale operations.

The TLC8044 features a fully differential analog signal path and has a 12-bit, 6-MSPS analog-to-digital converter that will support up to 36-bit color. The TLC8044 also affords the designer the option of using pixel-by-pixel digital correction circuitry, six internal offset correction registers (red, green, blue, even and odd pixels), and three internal registers to correct pixel shading. For global error correction, the TLC8044 offers both global offset and global gain adjustment for each color channel.

The TLC8144 uses a single-ended analog signal path that includes 3 independent analog programmable gain amplifiers (PGAs) and a 10-bit 6-MSPS analog-to-digital converter that will support up to 30-bit color. The TLC8144 is able to perform pixel-by-pixel compensation of pixel response non-uniformity (PRNU) using data that is stored externally. Alternatively the designer has the option of bypassing this step. The output of the A/D can be passed directly to the controlling processor.

This entire family of CCD interface devices features an easy interface to a host processor. The TLC8044 has a programmable output word length of 8,10,12, or 16 bits, a separate programmable threshold detect output for each color (for OCR operations), and a three wire serial input bus that sets all global and default correction values. The TLC8144 also incorporates interface flexibility. It features a flexible output architecture that allows the 10-bit output data to be accessed by either a 10-bit bus or via a time-multiplexed 8-bit bus. The TLC8144 is programmed using a simple serial or an 8-bit parallel interface. Both only draw 400-mW of power from a single 5-V supply.

TLC8144CPT