|
|
PDF PI3042A Data sheet ( Hoja de datos )
| Número de pieza | PI3042A | |
| Descripción | Contact Image Sensor Chip | |
| Fabricantes | AMI SEMICONDUCTOR | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de PI3042A (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
REVISION NUMBER: REV A
DATE: 09/26/05
PAGES: Page 1 of 18
PI3042A
Contact Image Sensor Chip
Preliminary Data Sheet
1 page  
www.DataPShreeleint4inUa.cryomPI3042A datasheet
Output Circuit Of The Image Sensor
The video signal from each photo-site is connected to a common video line on the sensor.
Each photo-site is composed of a phototransistor with a series MOS switch connecting its
emitter to a common video line. The video line is connected to the pad labeled IOUT. The
photo-sites are readout upon the closure of the MOS switch, which is sequentially switched on
and off by its internal scanning shift register, see Figure 1, PI3042A Block Diagram. For the
clock & timing operation of the image sensor see Figure 7, Timing Diagram Of The PI3042A
Sensor. The photo-sensing element is the base of the phototransistor where it detects and
converts the light energy to proportional charges and stores them in its base and collector
capacitance. When the MOS switch is activated, the emitter is connected to the video line and
acts as source follower, producing an impulse current proportional to the stored charges in the
base. This current is a discrete-time analog signal output called the video pixel. The charges in
the video pixel are proportional to the light energy impinging in the neighborhood of its photo-
sites. Figure 4, Video Pixel Output Structures, show a output structure of four photo-sites out of
128. The multiplexing MOS switch in each photo-site terminates into the output pad, IOUT,
through a common video line. As the shift register sequentially accesses each photo-site the
charges of the video pixel is sent to the IOUT where they are processed with an external signal
conversion circuit. See the follow section, Signal Conversion Circuit.
Figure 4. Video Pixel Output Structures
Signal Conversion Circuit
Figure 5, Video Output Test and Application Circuit is an example of the charge conversion that
is used in the CIS modules. It is usually bonded on the same PCB on which the image sensors
are bonded. In applications where cost is an important factor, this simple circuit provides the
cleanest technique in processing the video output. It integrates all the currents from each pixel
element onto a capacitor, CAP. It, also, sums the switch edge’s energy along with the signal
current pulses, hence minimizes the switching patterns on the video pixels. The summed
charges stored on the CAP, produce a pixel voltage. Its voltage amplitude is proportional to the
charge from the current pulse and the value of the CAP.
Page 5 of 18 Date: 09/23/05
5 Page 
www.DataSheet4U.com
2.5
2
1.5
1
0.5
0
VIDEO OUTPUT VS EXPOSURE
PI3042A Y-G LED RESPONSE 5.0 Mhz
EXPOSURE (uJ/cm^2)
EXP
Graph D. A typical Video Output a as function of Light Exposure
Illuminated with a Y-G LED Source with the PI3042A clocked at 5.0 MHz
A6 Module with PI3042A High Frequency Specifications
RED 660 LED Bar, A6 PCB In A6 Module Housing, At 2.0 MHz CLOCK
Parameters
Symbols
Typical
Units
Remarks
Line scanning rate
Tint (1)
835
µs/line
13 dies in the scan.
see note 1. (Bottom of
Table 6)
Clock frequency
Fclk (2)
2
MHz
Output voltage
Vpavg (3)
1.0
V
Amplifier Gain = 1.0,
see note 3
Output voltage non-uniformity Up (4)
± 20
%
LED bar non-
uniformity, see note 4.
Dark output voltage
Vd (5)
<15
mV
Dark output non-uniformity
Ud (6)
<15
mV
Adjacent Pixel non-uniformity Upadj (7)
<20
%
LED Bar Input Voltage
VLED (8)
5.0
V
LED Power Varies
greatly. See note 8.
LED Bar Input Current
ILED (8)
90
mA LED Power Varies
greatly. See note 8.
Table 3. Electro-Optical Characteristic at High Frequency
Page 11 of 18 Date: 09/23/05
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet PI3042A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| PI3042A | Contact Image Sensor Chip | AMI SEMICONDUCTOR |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |