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PDF OV7640 Data sheet ( Hoja de datos )
| Número de pieza | OV7640 | |
| Descripción | (OV7140) Color CMOS VGA Camera Chip | |
| Fabricantes | OmniVision | |
| Logotipo |  |
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Omni
ision
TM
Advanced Information
Preliminary Datasheet
OV7640 Color CMOS VGA (640 x 480) CAMERACHIPTM
OV7140 B&W CMOS VGA (640 x 480) CAMERACHIPTM
General Description
The OV7640 (color) and OV7140 (black and white)
CAMERACHIPSTM are low voltage CMOS image sensors
that provide the full functionality of a single-chip VGA
(640 x 480) camera and image processor in a small
footprint package. The OV7640/OV7140 provides
full-frame, sub-sampled or windowed 8-bit images in a
wide range of formats, controlled through OmniVision’s
Serial Camera Control Bus (SCCB) interface.
This product family has an image array capable of
operating at up to 30 frames per second (fps) with
complete user control over image quality, formatting and
output data transfer. All required image processing
functions, including exposure control, gamma, white
balance, color saturation, hue control and more, are also
programmable through the SCCB interface. In addition,
OmniVision CAMERACHIPs use proprietary sensor
technology to improve image quality by reducing or
eliminating common lighting/electrical sources of image
contamination such as fixed pattern noise, smearing,
blooming, etc. to produce a clean, fully stable color image.
Features
• High sensitivity for low-light operation
• 2.5V operating voltage for embedded portable
applications
• Standard Serial Camera Control Bus (SCCB)
interface
• VGA, QVGA (sub-sampled) and Windowed outputs
with Raw RGB, RGB (GRB 4:2:2), YUV (4:2:2) and
YCbCr (4:2:2) formats
• Automatic image control functions including:
Automatic Exposure Control (AEC), Automatic Gain
Control (AGC), Automatic White Balance (AWB),
Automatic Brightness Control (ABC), Automatic
Band Filter (ABF) for 60Hz noise and Automatic
Black-Level Calibration (ABLC)
• Image quality controls including color saturation,
hue, gamma, sharpness (edge enhancement),
anti-blooming and zero smearing
Ordering Information
Product
OV7640 (Color)
OV7140 (B&W)
Package
PLCC-28
PLCC-28
Applications
• Cellular and Picture Phones
• Toys
• PC Multimedia
Key Specifications
Power Supply
Array Size
Core
Analog
I/O
Power
Requirements
Temperature
Range
Active
Standby
Operation
Stable Image
Output Formats (8-bit)
Lens Size
Maximum Image
VGA
Transfer Rate
QVGA
Sensitivity
B&W
Color
S/N Ratio
Dynamic Range
Scan Mode
Maximum Exposure Interval
Gamma Correction
Pixel Size
Dark Current
Well Capacity
Fixed Pattern Noise
Image Area
Package Dimensions
640 x 480 (VGA)
2.5VDC + 10%
2.5VDC + 4%
2.25V to 3.3V
40 mW (30 fps, including
I/O power)
30 µW
-10°C to 70°C
0°C to 50°C
• YUV/YCbCr 4:2:2
• RGB 4:2:2
• Raw RGB Data
1/4"
30 fps
60 fps
2.20 V/Lux-sec
1.12 V/Lux-sec
46 dB
62 dB
Progressive/Interlaced
523 x tROW
0.45
5.6 µm x 5.6 µm
30 mV/s
60 Ke
< 0.03% of VPEAK-TO-PEAK
3.6 mm x 2.7 mm
11.43 mm x 11.43 mm
Figure 1 OV7640/OV7140 Pin Diagram
4 3 2 1 28 27 26
PWDN 5
25 Y0
NC 6
24 Y1
VREF 7
VDD_C 8
VSYNC 9
OV7640/OV7140
23 Y2
22 Y3
21 Y4
HREF 10
20 Y5
PCLK 11
19 Y6
12 13 14 15 16 17 18
Version 1.3, January 15, 2003
Proprietary to OmniVision Technologies
1
1 page  
Omni ision
Electrical Characteristics
Electrical Characteristics
Table 2
Absolute Maximum Ratings
Ambient Storage Temperature
-40ºC to +125ºC
VDD-A
Supply Voltages (with respect to Ground)
VDD-C
VDD-IO
All Input/Output Voltages (with respect to Ground)
3V
3V
4V
-0.3V to VDD_IO+1V
Lead Temperature, Surface-mount process
+230ºC
ESD Rating, Human Body model
2000V
NOTE: Exceeding the Absolute Maximum ratings shown above invalidates all AC and DC electrical specifications and may
result in permanent device damage.
Table 3
DC Characteristics (0°C < TA < 70°C)
Symbol
Parameter
Condition Min Typ Max
VDD-A
DC supply voltage – Analog
—
2.40 2.5 2.60
VDD-C
DC supply voltage – Core
—
2.25 2.5 2.75
VDD-IO
IDDA
DC supply voltage – I/O
Active (Operating) Current
—
See Note a
2.25
—
15
3.3
IDDS-SCCB
IDDS-PWDN
Standby Current
Standby Current
See Note b
1
10
VIH Input voltage HIGH
CMOS
0.7 x VDD-IO
VIL Input voltage LOW
0.3 x VDD-IO
VOH Output voltage HIGH
CMOS
(IOH / IOL)
0.9 x VDD-IO
VOL Output voltage LOW
IOH Output current HIGH
See Note c
8
0.1 x VDD-IO
IOL Output current LOW
15
IL
Input/Output Leakage
GND to VDD-IO
±1
a. VDD-A = VDD-C = 2.5V, VDD-IO = 3.0V
IDDA = ∑{IDD-IO+ IDD-C + IDD-A}, fCLK = 24MHz at 30 fps, no I/O loading
b. VDD-A = VDD-C = 2.5V, VDD-IO = 3.0V
IDDS:SCCB refers to a SCCB-initiated Standby, while IDDS:PWDN refers to a PWDN pin-initiated Standby
c. Standard Output Loading = 25pF, 1.2KΩ to 3V
Unit
V
V
V
mA
mA
µA
V
V
V
V
mA
mA
µA
Version 1.3, January 15, 2003
Proprietary to OmniVision Technologies
5
5 Page 
Omni ision
Table 5
SCCB Register List
Address Register Default
(Hex)
Name
(Hex)
R/W
14 COMC 04
RW
Description
Common Control C
Bit[7:6]: Reserved
Bit[5]: Output Format – Resolution
0: VGA (640x480)
1: QVGA (320x240)
Bit[4]: Reserved
Bit[3]: Data Format – HREF Polarity
0: HREF Positive
1: HREF Negative
Register Set
15 COMD 00
16 RSVD XX
17 HSTART 1A
18 HSTOP BA
19 VSTRT 03
1A VSTOP F3
1B PSHFT 00
1C MIDH 7F
1D MIDL A2
1E RSVD XX
POS
NEG
Bit[2:0]: Reserved
Common Control D
Bit[7]: Data Format – Output Flag Bit Disable
0: Frame = 254 data bits (00/FF = Reserved flag bits)
1: Frame = 256 data bits
Bit[6]: Data Format – Y[7:0]-PCLK Reference Edge
RW 0: Y[7:0] data out on PCLK falling edge
1: Y[7:0] data out on PCLK rising edge
Bit[5:1]: Reserved
Bit[0]: Data Format – UV Sequence Exchange
0: V Y U Y V Y U Y
1: U Y V Y U Y V Y
Note: Bit[0] is not programmable on the B&W OV7140.
– Reserved
RW Output Format – Horizontal Frame (HREF Column) Start
RW Output Format – Horizontal Frame (HREF Column) Stop
RW Output Format – Vertical Frame (Row) Start
RW Output Format – Vertical Frame (Row) Stop
Data Format – Pixel Delay Select
RW (Delays timing of the Y[7:0] data relative to HREF in pixel units)
• Range: [00] (No delay) to [FF] (256 pixel delay)
R Manufacturer ID Byte – High (Read only = 0x7F)
R Manufacturer ID Byte – Low (Read only = 0xA2)
– Reserved
Version 1.3, January 15, 2003
Proprietary to OmniVision Technologies
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet OV7640.PDF ] | |
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