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TC244A Fiches technique(PDF) 1 Page - Texas Instruments |
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TC244A Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 19 page TC244A 786- × 488-PIXEL CCD IMAGE SENSOR SOCS056 – JUNE 1996 Copyright © 1996, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • High-Resolution, Solid-State Image Sensor for NTSC Color TV Applications • 8-mm Image-Area Diagonal, Compatible With 1/2” Vidicon Optics • 755 (H) x 242 (V) Active Elements in Image-Sensing Area • Advanced On-Chip Signal Processing • Low Dark Current • Electron-Hole Recombination Antiblooming • Dynamic Range . . . More Than 70 dB • High Sensitivity • High Photoresponse Uniformity • High Blue Response • Single-Phase Clocking • Separate Outputs for Each Color (RGB) • Solid-State Reliability With No Image Burn-in, Residual Imaging, Image Distortion, Image Lag, or Microphonics description The TC244A is a frame-transfer charge-coupled device (CCD) image sensor designed for use in single-chip color NTSC TV applications. The device is intended to replace the 1/2-inch vidicon tube in applications requiring small size, high reliability, and low cost. The image-sensing area of the TC244A is configured into 242 lines with 786 elements in each line. Twenty-nine elements are provided in each line for dark reference. The blooming-protection feature of the sensor is based on recombining excess charge with charge of opposite polarity in the substrate. This antiblooming is activated by supplying clocking pulses to the antiblooming gate, which is an integral part of each image-sensing element. The sensor is designed to operate in an interlace mode, electronically displacing the image-sensing elements by one-half of a vertical line during the charge integration period in alternate fields, effectively increasing the vertical resolution and minimizing aliasing. The single-chip color-sensing capability of the TC244A is achieved by processing on striped-color filter with RGB organization. The stripes are precisely aligned to the sensing elements, and the signal-charge columns are multiplexed during the readout into three separate registers with three separate outputs corresponding to each individual color. This MOS device contains limited built-in gate protection. During storage or handling, the device leads should be shorted together or the device should be placed in conductive foam. In a circuit, unused inputs should always be connected to SUB. Under no circumstances should pin voltages exceed absolute maximum ratings. Avoid shorting OUTn to ADB during operation to prevent damage to the amplifier. The device can also be damaged if the output terminals are reverse-biased and an excessive current is allowed to flow. Specific guidelines for handling devices of this type are contained in the publication Guidelines for Handling Electrostatic-Discharge-Sensitive (ESDS) Devices and Assemblies available from Texas Instruments. SUB 1 IAG 2 ABG 3 ADB 4 OUT3 (B) 5 OUT2 (G) 6 OUT1 (R) 7 AMP GND 8 CDB 9 SUB 10 20 SUB 19 IAG 18 ABG 17 SAG 16 SRG3 15 SRG2 14 SRG1 13 NC 12 TRG 11 IDB DUAL-IN-LINE PACKAGE (TOP VIEW) NC – No internal connection PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Numéro de pièce similaire - TC244A |
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Description similaire - TC244A |
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