|
|
PDF LM9627 Data sheet ( Hoja de datos )
| Número de pieza | LM9627 | |
| Descripción | Color CMOS Image Sensor VGA 30 FPS | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LM9627 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
March 2001
LM9627 Color CMOS Image Sensor VGA 30 FPS
General Description
The LM9627 is a high performance, low power, third inch VGA
CMOS Active Pixel Sensor capable of capturing color digital still
or motion images and converting them to a digital data stream.
In addition to the active pixel array, an on-chip 12 bit A/D conver-
tor, fixed pattern noise elimination circuits and a video gain
amplifier is provided. Furthermore, an integrated programmable
smart timing and control circuit allows the user maximum flexibil-
ity in adjusting integration time, active window size, gain and
frame rate. Various control, timing and power modes are also
provided.
Features
• Supplied with micro lenses
• Video or snapshot operations
• Programmable pixel clock, inter-frame and inter-line delays.
• Programmable partial or full frame integration
• Programmable gain adjustment
• Horizontal & vertical sub-sampling (2:1 & 4:2)
• Windowing
• External snapshot trigger & event synchronisation signals
• Auto black level compensation
• Flexible digital video read-out supporting programmable:
- polarity for synchronisation and pixel clock signals
- leading edge adjustment for horizontal synchronization
• Programmable via 2 wire I2C compatible serial interface
• Power on reset & power down mode
Applications
• PC Camera
• Digital Still Camera
• Video Conferencing
• Security Cameras
• Toys
• Machine Vision
Key Specifications
• Array Format
• Effective Image Area
• Optical Format
• Pixel Size
• Video Outputs
• Dynamic Range
• FPN
• Sensitivity
red
green
blue
• Quantum Efficiency
• Fill Factor
• Color Mosaic
• Package
• Single Supply
• Power Consumption
• Operating Temp
Total: 664H x 504V
Active: 648H x 488V
Total: 4.98mm x 3.78 mm
Active: 4.86 mm x 3.66 mm
1/3“
7.5µm x 7.5µm
8,10 & 12 Bit Digital
57dB
0.35%
14.5 kLSBs/lux.s
7.5 kLSBs/lux.s
5.1 kLSBs/lux.s
27%
47% (no micro lens)
Bayer pattern
48 LCC
3.3 V
90 mW
0 to 50oC
System Block Diagram
lens LM9627
©2000 National Semiconductor Corporation
12bit digital image
I2C compatible
event trigger
snapshot
Confidential
Storage
Digital Image
Processor
www.national.com
1 page  
Pin Descriptions (Continued)
Pin Name
I/O Typ Description
26 d7
O
D
Digital output. Bit 7 of the digital video output bus. This output can be put into tri-state
mode.
27 d8
O D Digital output. Bit 8 of the digital video output bus. This output can be put into tri-state
mode.
28 d9
O
D
Digital output. Bit 9 of the digital video output bus. This output can be put into tri-state
mode.
29 d10
Digital output. Bit 10 of the digital video output bus. This output can be put into tri-state
O D mode.
30 d11
O
D
Digital output. Bit 11 of the digital video output bus. This output can be put into tri-state
mode.
31 vdd_od2 I
P 3.3 volt supply for the digital IO buffers.
32 vss_od2 I
P 0 volt supply for the digital IO buffers
33 vdd_ana2 I
P 3.3 volt supply for analog circuits.
34 vss_ana2 I
P 0 volt supply for analog circuits.
35 vref_adc I
A A/D reference resistor ladder voltage. See figure 4 for equivalent circuit.
36 vss_ana1 I
P 0 volt supply for analog circuits.
37 vdd_ana1 I
P 3.3 volt supply for analog circuits.
38 offset
I A Analog input used to adjust the offset of the sensor. See figure 4 for equivalent circuit.
39 fine_ctrl O A Analog output used to drive the offset pin.
40 gnd
This pin must be tied to ground.
41 fine_i
I A Bias current for the fine offset adjust.
42 NC
Pin not used, do not connect.
43 NC
Pin not used, do not connect.
44 vdd_od3 I
P 3.3 volt supply for the sensor.
45 vss_od3 I
P 0 volt supply for the sensor.
46 vss_od1 I
P 0 volt supply for the digital IO buffers
47 vdd_od1 I
P 3.3 volt supply for the digital IO buffers.
48 extsync
O
D
Digital output. The external event synchronization signal is used to synchronize external
events in snapshot mode.
Legend: (I=Input), (O=Output), (IO=Bi-directional), (P=Power), (D=Digital), (A=Analog).
adc_vref
800Ω
offset
1KΩ
200Ω
Figure 4. Equivalent Circuits For adc_ref and offset pins
Confidential
5 www.national.com
5 Page 
Functional Description (continued)
2.0 WINDOWING
The integrated timing and control circuit allows any size window
in any position within the active region of the array to be read out
with a 1x1 pixel resolution. The window read out is called the
“Display Window”.
A “Scan Window” must be defined first, by programing the start
and end row addresses as shown in Figure 13. Four coordinates
(start row address, start column address, end row address &
end column address) are programmed to define the size and
location of the “Display Window” to be read out (see Figure 13).
scan row
start address
display col
start address
display col
end address
display row
start address
display row
end address
Display Window
Scan Window
scan row
end address
Active Pixel Array
Figure 13. Windowing
Notes:
• The “Display Window” must always be defined within the
“Scan Window”.
• A “Display Window” can only be read out in the progressive
scan mode.
• By default the “Display Window” is the complete array.
2.1 Programming the scan window
Two registers (SROWS & SROWE) are provided to program the
size of the scan window. The start and end row address of the
scan window is given by:
scan row start address = (2* SwStartRow) + SwLsb
scan row end address = (2* SwEndRow) + 1 + SwLsb
Where:
SwStartRow
is the contents of the Scan Window start row
register (SROWS)
SwEndROW
is the contents of the Scan Window end row reg-
ister (SROWE)
SwLsb
is bit 6 of the Display Window LSB register
(DWLSB)
2.2 Programming the display window
Five register (DROWS, DROWE, DCOLS, DCOLE and DWLSB)
are provided to program the display window as described in the
register section of this datasheet.
3.0 READ OUT MODES
3.1 Progressive Scan Readout Mode
In progressive scan readout mode, every pixel in every row in
the display window is consecutively read out, one pixel at a time,
starting with the left most pixel in the top most row. Hence, for
the example shown in Figure 14, the read out order will be
a0,b0,...,r0 then a1,b1,...,r1 and so on until pixel r20 is read out.
Column/Horizontal
a b c d e f g h i j k l mn o p q r
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Figure 14: Progressive Scan Read Out Mode
3.2 Interlaced Readout Mode
In interlaced readout mode, pixels are read out in two fields, an
Odd Field followed by an Even Field.
The Odd Field, consisting of all even row pairs contained within
the display window, is read out first. Each pixel in the “Odd Field”
is consecutively read out, one pixel at a time, starting with the
left most pixel in the top most row pair.
The Even Field, consisting of all odd row pairs contained within
the display window, is then read out. Each pixel in the “Even
Field” is consecutively read out, one pixel at a time, starting with
the left most pixel in the top most row pair.
Column/Horizontal
ab c d e f gh i j k l mn op q r
0
1
4
5
8
9
12
13
16
17
Odd Field
Column/Horizontal
ab c d e f gh i j k l mn op q r
2
3
6
7
10
11
14
15
18
19
Even Field
Figure 15: Interlace Read Out Mode
Hence, for the example shown in Figure 15, the display window
is broken up into two fields, as shown in Figure 15. Pixels
a0,b0,...,r0 and a1,b1,...,r1 are readout first and so on until pix-
els a17,b17,...r17 in the even field are read out. The even field
read out is followed by pixels in the odd field, a2,b2,...,r2 then
a3,b3,...,r3 until pixels a19,b19,...,r19
Confidential
11 www.national.com
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LM9627.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM9627 | Color CMOS Image Sensor VGA 30 FPS | National Semiconductor |
| LM9627CCEA | Color CMOS Image Sensor VGA 30 FPS | National Semiconductor |
| LM9628 | Color CMOS Image Sensor VGA 30 FPS | National 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 |