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PDF PAS302BCA-32 Data sheet ( Hoja de datos )
| Número de pieza | PAS302BCA-32 | |
| Descripción | CMOS VGA DIGITAL IMAGE SENSOR | |
| Fabricantes | PixArt | |
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PAS302BCA-32
CMOS Image Sensor IC
PAS302BCA-32 CMOS VGA DIGITAL IMAGE SENSOR
General Description
The PAS302BCA-32 is a highly integrated CMOS active-pixel image sensor that has a VGA resolution
of 644H x 484V. The PAS302BCA-32 outputs 10-bit RGB raw data through a parallel data bus and is
available in 32-pin LCC package.
The PAS302BCA-32 can be programmed to set the exposure time for different luminance condition via
I2CTM serial control bus. By programming the internal register sets, it can perform on-chip frame rate
adjustment, offset correction DAC and programmable gain control.
Features
Key Specification
VGA(644 x 484 pixels) resolution, ~1/4”
Lens
Supply Voltage
2.5V ~ 3.3V
Bayer-RGB color filter array
Output format: 10-bit parallel RGB raw data
On-chip 10-bit pipelined A/D converter
On-chip programmable gain amplifier
Resolution
Array diagonal
Pixel Size
644(H) x 484(V)
4.5mm (~1/4”Optic)
5.6µmx5.6µm
4-bit color gain amplifier (x1~x2)
4-bit global gain amplifier (x1~x2)
Digital gain stage
Continuous variable frame
time(1/2sec~1/30sec)
Chief Ray Angle
Frame rate
System clock
12∘ ~ 14∘
~30 fps
Up to 48 MHz
Continuous variable exposure time
Pixel clock
Up to 12MHz
I2CTM Interface
Support flash light timing
Single 2.5V / 3.3V supply voltage
< 15mA(~30 fps) power dissipation
2µA power dissipation when power down
mode
Window-Of-Interest (WOI)
Sub-sampling
Defect compensation
Sensitivity
Color filter
Exposure Time
Scan Mode
S/N Ratio
Package
1.88 V/Lux-Sec
RGB Bayer Pattern
~ Frame time to Line time
Progressive
> 45 dB
32-pin LCC
Note1: Only two decoupling capacitors needed
Note2: Good sensitivity compared to competitors
Version 2.3, 13 Sep. 2004
E-mail: [email protected]
PixArt Imaging Inc.
1
1 page  
PAS302BCA-32
CMOS Image Sensor IC
3. Function Description
3.1. Defect Compensation
The Defect Compensation block can detect the possible defect pixel and replace it with average
output of like-colored pixels from near side of defect pixel. There is no limitation capability of
defect pixel number. This function can be programmed to enable/disable by user.
3.2. Companding Curves
The companding function which means compressing and expanding is used to simulate the
gamma curve and do non-linear transformation before the data is output. There are 4 curves
selected by setting Register Compand_Sel as shown in Fig. 3.1. This function can be
programmed to enable/disable by user.
O/P ( 10-Bit)
11,1111,1111
3 2 1 0 without companding
00,0xxx,xxxx 00,1xxx,xxxx 010
011
10,xxxx,xxxx
11,xxxx,xxxx
I/P ( 10-Bit)
Figure 3.1 Companding curves program by Compand_EnH and Compand_Sel.
3.3.Power Down Mode
The PAS302BCA-32 can be powered down by setting register “Sw_PwrDn” = 1 or by enable
Pwdn pin. The register value will sustain in the power down mode. PAS302BCA-32 supports 2
power down modes:
z Software power down：Set register “Sw_PwrDn” = 1 to power down all the internal block
except I2CTM .
z Hardware power down：Pull Pwdn pin to high to power down the chip. The chip will go into
standby mode.
3.4. Reset Mode
The PAS302BCA-32 can be reseted by setting register “Sw_Reset” = 1 or by enable Reset pin.
PAS302BCA-32 supports 2 reset modes:
z Software reset：Set register “Sw_Reset” = 1 to reset all the I2CTM registers.
z Hardware reset：Pull Reset pin to high to reset the full chip.
Version 2.3, 13 Sep. 2004
E-mail: [email protected]
PixArt Imaging Inc.
5
5 Page 
PAS302BCA-32
Noise margin at HIGH level for each
connected device (including hysteresis)
VnH
Note: It depends on the "high" period time of SCL.
CMOS Image Sensor IC
0.2 VDD
-
V
Version 2.3, 13 Sep. 2004
E-mail: [email protected]
PixArt Imaging Inc.
11
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| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet PAS302BCA-32.PDF ] | |
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