TC255P

Pinout




Specifications

Supply voltage range, V^_CC: ADB (see Note 1)   . . . . . . . . . . . . . . . . . . . 0 V to 15 V
Input voltage range, VI: ABG, IAG1, IAG2, SAG, SRG   . . . . . . . . . . . . 15 V to 15 V
Operating free-air temperature range, T^_A  . . . . . . . . . . . . . . . . . . . .10°C to 45°C
Storage temperature range, T^_STG . . . . . . . . . . . . . . . . . . . . . . . . . .  30°C to 85°C


Description

The TC255P is  a  frame-transfer charge-coupled device  (CCD)  designed  for  use in B/W NTSC TV and special-
purpose applications where low cost and small size are desired.

The image-sensing area of the TC255P is configured  in  243  lines  with  336  elements  in  each  line.  Twelve
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 can be operated in a noninterlace mode as a 324(H) by 243(V) sensor with low  dark  current. The
device can also be operated in an interlace mode, electronically displacing the image-sensing elements during
the charge  integration  in  alternate  fields, and effectively increasing  the  vertical  resolution  and minimizing
aliasing.

One important aspect of this image sensor is its high-speed image-transfer capability. This capability allows for
an electronic-shutter function comparable to interline-transfer and frame-interline-transfer sensors without the
loss of sensitivity and resolution inherent in those technologies.

The charge is converted to signal voltage with a 12-µV per electron conversion  factor  by  a  high-performance
charge-detection  structure  with  built-in  automatic  reset  and  a  voltage-reference  generator. The signal is
buffered by a low-noise two-stage source-follower amplifier to provide high output-drive capability.

The TC255P uses TI-proprietary virtual-phase technology, which provides devices with high blue response, low
dark signal,high photoresponse uniformity,and single-phase clocking.The TC255P is characterized for operation
from 10°C to 45°C.