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AMIS-720649 Dataheets PDF



Part Number AMIS-720649
Manufacturers AMI SEMICONDUCTOR
Logo AMI SEMICONDUCTOR
Description Image Sensor
Datasheet AMIS-720649 DatasheetAMIS-720649 Datasheet (PDF)

AMIS-720649: Contact Image Sensor Data Sheet 1.0 General Description AMI Semiconductor’s AMIS-720649 (PI6049A) contact image sensor (CIS) is a 600 dots per inch (dpi) resolution linear image sensor, which employs AMI Semiconductor’s proprietary CMOS image sensing technology. The sensor contains an on-chip output amplifier, power down circuitry and parallel transfer features that are uniquely combined with present-day active-pixel-sensor technology. The image sensors are designed to be cascaded.

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AMIS-720649: Contact Image Sensor Data Sheet 1.0 General Description AMI Semiconductor’s AMIS-720649 (PI6049A) contact image sensor (CIS) is a 600 dots per inch (dpi) resolution linear image sensor, which employs AMI Semiconductor’s proprietary CMOS image sensing technology. The sensor contains an on-chip output amplifier, power down circuitry and parallel transfer features that are uniquely combined with present-day active-pixel-sensor technology. The image sensors are designed to be cascaded end-to-end on a printed circuit board (PCB) and packaged in an image sensing module. Applications for the sensor array include facsimiles, PC scanners, check readers, and office automation equipment. Figure 1 is a block diagram of the sensor. Each sensor consists of 344 active pixels, their associated multiplexing switches, buffers and an output amplifier circuit with a power-down feature. The detector’s element-to-element spacing is approximately 42.3µm. The size of each sensor without the scribe lines is 14560µm by 380µm. 2.0 Block Diagram 14560µm 42.3µm 1 2 3 4 Row of 344 Pixels and Video Line Multiplexer 341 342 343 344 Parallel Transfer, Storage Cells and Readout Registers 380µm www.DataSheet4U.com Amplifier, PowerDown and Offset Control SI SIC CLK AVDD DVDD AVSS DVSS VOUT OR OS VR SO GBST Figure 1: Sensor Block Diagram AMI Semiconductor – Dec. 05, M-20488-001 www.amis.com 1 AMIS-720649: Contact Image Sensor 3.0 Key Features • • • • • • • • • • • • 600dpi 344 image sensor elements (pixels) 42.3µm pixel center-to-center spacing (23.62dots/mm) On-chip amplifier Single 5.0V power supply 5.0V input clocks 2.5MHz maximum pixel rate Parallel / integrate and transfer Power-down circuit High sensitivity Low power Low noise Data Sheet 4.0 Unique Features There are five unique features incorporated in the AMIS-720649 which improve the sensor’s performance. 4.1 Pixel-to-Pixel Offset Cancellation Circuit The sensor employs a pixel-to-pixel offset cancellation circuit, which reduces the fix pattern noise (FPN), and amplifier offsets. In addition, this innovative circuit design greatly improves the optical linearity and low noise sensitivity. 4.2 Parallel Integrate, Transfer and Hold The sensor has a parallel integrate, transfer and hold feature, which allows the sensor to be read out while photon integration is taking place. These features are approached through the use of an integrate and hold cell, located at each pixel site. Each pixel’s charge is www.DataSheet4U.com read from its storage site as the sensor’s shift register sequentially transfers each pixel’s charge onto a common video line. 4.3 Dual Scan Initiation Inputs, GBST and SI Each sensor has two scan initiation inputs, the global start pulse (GBST) and the start pulse (SI). These clocks help to reduce the sensor-to-sensor transition fix pattern noise by initializing and preprocessing all sensors simultaneously before they start their readout scan. The internal shift register s.


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