VV6501C001 STMicroelectronics, VV6501C001 Datasheet - Page 49

• Manufacturer Part Number: VV6501C001
• Description: IC SENSOR COLOR VGA CMOS 36CLCC
• Manufacturer: STMicroelectronics
• Type: CMOS Imagingr

Specifications of VV6501C001

• Pixel Size: 5.6µm x 5.6µm
• Active Pixel Array: 640H x 480V
• Frames Per Second: 30
• Voltage - Supply: 3V, 5V
• Package / Case: 36-CLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3883; VV6501C001

VV6501
7.2
Sensor SNR
The SNR measurement given here is based on the temporal noise. The SNR is calculated as the
pixel saturation voltage divided by the temporal noise at that saturation level. The optical setup is
the same as for the measurement of average sensitivity. The sensor gain, G, is set to x1.
The SNR figure is then calculated as:
Fixed Pattern Noise (FPN)
The FPN of an image sensor is the average pixel non-temporal noise divided by the average pixel
voltage. The illumination source is the same as for the average sensitivity measurement. The FPN
is calculated at coarse exposure settings of 0,10,150,250 and 302 with a gain set to 1. 10 frames
are grabbed and averaged to produce a temporally independent frame before each calculation.
FPN is expressed in mV.
Vertical Fixed Pattern Noise (VFPN)
VFPN describes the spatial noise in an image sensor related to patterns with a vertical orientation.
The VFPN is defined as the standard deviation over all columns of the average pixel voltage for
each column determined at zero exposure and zero illumination. VFPN is expressed in mV.
Shading
Shading describes how average pixel values per “block” change across the image sensor array. For
fine shading calculations, the image sensor array is split into 30 pixel by 30 pixel blocks. An average
value is then calculated for each block, averages are then compared across the whole device. The
blocks are increased in size to 60 pixels by 60 pixels for the gross shading calculation. Shading is
expressed in mV.
Optical characterisation results
Average sensitivity
Dark signal
Temporal noise
Dynamic Range
SNR
Fixed Pattern Noise
Vertical fixed pattern noise
Shading (Gross)
Optical parameter
Table 24: Optical characterization
Red
1.1
-
-
-
-
-
-
-
20
log
ÿ
G Vsat
--------------------
Green
signal
2.05
2.12
1.13
0.68
9.0
1.3
54
41
þ
.
Blue
1.0
-
-
-
-
-
-
-
Optical Characteristics
V/lux.s
mV/s
Unit
mV
mV
mV
dB
dB
%
49/60