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Version 1.1, March 30, 2007 OmniPixel2 and CameraChip are trademarks of OmniVision Technologies, Inc.

These specifications are subject to change without notice.

Advanced Information

Preliminary Datasheet

OV7725 Color CMOS VGA (640x480) CAMERACHIP

Sensor

mni ision

with OmniPixel2

Technology

General Description

The OV7725 CAMERACHIP™ image sensor is a low

voltage CMOS device that provides the full functionality of

a single-chip VGA camera and image processor in a small

footprint package. The OV7725 provides full-frame,

sub-sampled or windowed 8-bit/10-bit images in a wide

range of formats, controlled through the Serial Camera

Control Bus (SCCB) interface.

This device has an image array capable of operating at up

to 60 frames per second (fps) in VGA 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

sensors 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

• Standard SCCB interface

• Output support for Raw RGB, RGB (GRB 4:2:2,

RGB565/555/444) and YCbCr (4:2:2) formats

• Supports image sizes: VGA, QVGA, and any size

scaling down from CIF to 40x30

• VarioPixel

method for sub-sampling

• Automatic image control functions including:

Automatic Exposure Control (AEC), Automatic Gain

Control (AGC), Automatic White Balance (AWB),

Automatic Band Filter (ABF), and Automatic

Black-Level Calibration (ABLC)

• Image quality controls including color saturation,

hue, gamma, sharpness (edge enhancement), and

anti-blooming

• ISP includes noise reduction and defect correction

• Lens shading correction

• Saturation level auto adjust (UV adjust)

• Edge enhancement level auto adjust

• De-noise level auto adjust

• Frame synchronization capability

Ordering Information

Note: The OV7725 uses a lead-free

package.

Product Package

OV07725-VL1A (Color, lead-free) 28-pin CSP2

Applications

• Cellular and picture phones

•Toys

• PC Multimedia

• Digital still cameras

Key Specifications

Figure 1 OV7725 Pinout (Top View)

Array Size 640 x 480

Power Supply

Digital Core 1.8VDC +

10%

Analog 3.0V to 3.3V

I/O

a. I/O power should be 2.45V or higher when using the internal

regulator for Core (1.8V); otherwise, it is necessary to provide

an external 1.8V for the Core power supply

1.7V to 3.3V

Power

Requirements

Active

120 mW typical

(60 fps VGA, YUV)

Standby < 20 µA

Temperature Range -20°C to +70°C

Output Format (8-bit)

• YUV/YCbCr 4:2:2

• RGB565/555/444

• GRB 4:2:2

•Raw RGB Data

Lens Size 1/4"

Lens Chief Ray Angle 25° non linear

Max Image Transfer Rate 60 fps for VGA

Sensitivity 3.0 V/(Lux

• sec)

S/N Ratio 50 dB

Dynamic Range 60 dB

Scan Mode Progressive

Electronic Exposure Up to 510:1 (for selected fps)

Pixel Size 6.0 µm x 6.0 µm

Dark Current 40 mV/s

Well Capacity 26 Ke

Fixed Pattern Noise < 0.03% of V

PEAK-TO-PEAK

Image Area 3984 µm x 2952 µm

Package Dimensions 5345 µm x 5265 µm

ADVDD

RSTB

VREFH

OV7725

FSIN

SCL

ADGND

VREFN

AGND

AVDD

SDA

PWDN

DOVDD

XCLK

DOGND

HREF

VSYNC

DVDD

PCLK

7725CSP_DS_00

Summary of content (36 pages)

PAGE 1
Omni ision Advanced Information Preliminary Datasheet ® OV7725 Color CMOS VGA (640x480) CAMERACHIPTM Sensor with OmniPixel2TM Technology General Description Applications The OV7725 CAMERACHIP™ image sensor is a low voltage CMOS device that provides the full functionality of a single-chip VGA camera and image processor in a small footprint package.
PAGE 2
OV7725 Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Functional Description Figure 2 shows the functional block diagram of the OV7725 image sensor.
PAGE 3
Omni Functional Description ision Image Sensor Array The OV7725 sensor has an image array of 656 x 488 pixels for a total of 320,128 pixels, of which 640 x 480 pixels are active (307,200 pixels). Figure 3 shows a cross-section of the image sensor array.
PAGE 4
OV7725 Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Pin Description Table 1 Pin Description Pin Number a. b. c.
PAGE 5
Omni Electrical Characteristics ision Electrical Characteristics Table 2 Operating Conditions Parameter Min Max Operating temperature -20°C +70°C Storage temperaturea -40°C +125°C a. Exceeding the stresses listed may permanently damage the device. This is a stress rating only and functional operation of the sensor at these and any other condition above those indicated in this specification is not implied.
PAGE 6
OV7725 Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Table 5 Omni ision Functional and AC Characteristics (-20°C < TA < 70°C) Symbol Parameter Min Typ Max Unit Functional Characteristics + 1/2 LSB +1 LSB A/D Differential non-linearity A/D Integral non-linearity AGC Range 30 dB Red/Blue adjustment range 12 dB Inputs (PWDN, CLK, RESET#) fCLK Input clock frequency 10 24 48 MHz tCLK Input clock period 21 42 100 ns tCLK:DC Clock duty cycle 45 50 55 % tS:RESET Setting
PAGE 7
Omni Timing Specifications ision Timing Specifications Figure 4 SCCB Timing Diagram tHIGH tF tR SCL tHD:STA SDA (IN) tLOW tSU:DAT tSU:STO tSU:STA tHD:DAT tAA tBUF SDA (OUT) tDH Figure 5 7725CSP_DS_004 Horizontal Timing tPCLK PCLK tPHL tPHL HREF (row data) tPDV D[9:0] last byte zero tSU first byte last byte tHD Version 1.1, March 30, 2007 7725CSP_DS_005 Proprietary to OmniVision Technologies, Inc.
PAGE 8
OV7725 Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Figure 6 Omni ision VGA Frame Timing 510 x tLINE 480 x tLINE VSYNC 4 x tLINE 18 tLINE tLINE = 784 tP 8 tLINE 144 tP HREF 640 tP 64 tP 37 tP 13 tP HSYNC D[9:0] invalid data invalid data row 0 row 1 row 2 row 479 P0 - P639 note 1 for raw data, tP = tPCLK note 2 for YUV/RGB, tP = 2 x tPCLK Figure 7 7725CSP_DS_006 QVGA Frame Timing 278 x tLINE 1240 x tLINE VSYNC 4 x tLINE 22 tLINE tLINE = 576 tP 12 tLINE 256 tP HREF 320 tP 64 tP 1
PAGE 9
Omni Timing Specifications ision Figure 9 RGB 565 Output Timing Diagram tPCLK PCLK tPHL tPHL HREF (row data) tSU tPDV D[9:2] last byte zero first byte last byte tHD first byte Figure 10 second byte D[9] R4 D[9] G2 D[8] . D[8] . D[7] . D[7] G0 D[6] . D[6] B4 D[5] R0 D[5] . D[4] G5 D[4] . D[3] . D[3] .
PAGE 10
OV7725 Figure 11 Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision RGB 444 Output Timing Diagram tPCLK PCLK tPHL tPHL HREF (row data) tSU tPDV D[9:2] last byte zero first byte last byte tHD first byte 10 second byte D[9] X D[9] G3 D[8] . D[8] . D[7] . D[7] . D[6] X D[6] G0 D[5] R3 D[5] B3 D[4] . D[4] . D[3] . D[3] . D[2] R0 D[2] B0 Proprietary to OmniVision Technologies, Inc. 7725CSP_DS_011 Version 1.
PAGE 11
Omni Register Set ision Register Set Table 6 provides a list and description of the Device Control registers contained in the OV7725. For all register Enable/Disable bits, ENABLE = 1 and DISABLE = 0. The device slave addresses are 42 for write and 43 for read.
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OV7725 Table 6 Address (Hex) Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Device Control Register List (Sheet 2 of 13) Register Name Default (Hex) R/W Description Common Control 3 0C COM3 10 Bit[7]: Bit[6]: Bit[5]: Bit[4]: Bit[3]: Bit[2]: RW Bit[1]: Bit[0]: Vertical flip image ON/OFF selection Horizontal mirror image ON/OFF selection Swap B/R output sequence in RGB output mode Swap Y/UV output sequence in YUV output mode Swap output MSB/LSB Tri-state option for output clock at pow
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Omni Register Set ision Table 6 Device Control Register List (Sheet 3 of 13) Address (Hex) Register Name Default (Hex) R/W 10 AEC 40 RW Description Exposure Value Bit[7:0]: AEC[7:0] (see register AECH for AEC[15:8]) Internal Clock 11 CLKRC 80 RW Bit[7]: Bit[6]: Bit[5:0]: Reserved Use external clock directly (no clock pre-scale available) Internal clock pre-scalar F(internal clock) = F(input clock)/(Bit[5:0]+1)/2 • Range: [0 0000] to [1 1111] Common Control 7 Bit[7]: Bit[6]: 12 COM7
PAGE 14
OV7725 Table 6 Address (Hex) Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Device Control Register List (Sheet 4 of 13) Register Name Default (Hex) R/W Description Common Control 9 Bit[7]: Bit[6:4]: 14 COM9 4A RW Bit[3]: Bit[2]: Bit[1]: Bit[0]: Histogram or average based AEC/AGC selection Automatic Gain Ceiling - maximum AGC value 000: 2x 001: 4x 010: 8x 011: 16x 100: 32x 101 Not allowed 110: Not allowed 111: Not allowed Reserved Drop VSYNC output of corrupt frame Drop HREF output of
PAGE 15
Omni Register Set ision Table 6 Device Control Register List (Sheet 5 of 13) Address (Hex) Register Name Default (Hex) R/W 1C MIDH 7F R Manufacturer ID Byte – High (Read only = 0x7F) 1D MIDL A2 R Manufacturer ID Byte – Low (Read only = 0xA2) 1E RSVD XX – Reserved 1F LAEC 00 RW Description Fine AEC Value - defines exposure value less than one row period Common Control 11 Bit[7:2]: Bit[1]: Bit[0]: Reserved Single frame ON/OFF selection Single frame transfer trigger 20 COM11
PAGE 16
OV7725 Table 6 Address (Hex) Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Device Control Register List (Sheet 6 of 13) Register Name Default (Hex) R/W Description Image Start and Size Control Bit[7]: Bit[6]: Bit[5:4]: Bit[3]: Bit[2]: Bit[1:0]: Mirror image edge alignment Vertical HREF window start control LSB Horizontal HREF window start control LSBs Data output bit shift test pattern ON/OFF control Vertical sensor size LSB Horizontal sensor size 2 LSBs 32 HREF 00 RW 33 DM_LNL 00
PAGE 17
Omni Register Set ision Table 6 Address (Hex) Device Control Register List (Sheet 7 of 13) Register Name Default (Hex) R/W Description Common Control 15 40 COM15 C0 RW Bit[7:4]: Bit[3]: Bit[2:0]: Reserved AD add 128 bit offset Reserved Common Control 16 41 COM16 08 RW 42 TGT_B 80 RW BLC Blue Channel Target Value 43 TGT_R 80 RW BLC Red Channel Target Value 44 TGT_Gb 80 RW BLC Gb Channel Target Value 45 TGT_Gr 80 RW BLC Gr Channel Target Value Bit[7:2]: Bit[1:0]: Reserve
PAGE 18
OV7725 Table 6 Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Device Control Register List (Sheet 8 of 13) Address (Hex) Register Name Default (Hex) R/W 4C LC_COEFR 50 RW Description Lens Correction R Channel Compensation Coefficient (effective only when LC_CTR[2] is high) Analog Fix Gain Amplifier 4D FixGain 00 RW 4E AREF0 EF RW Bit[7:6]: Bit[5:4]: Bit[3:2]: Bit[1:0]: Gb channel fixed gain Gr channel fixed gain B channel fixed gain R channel fixed gain Sensor Reference Con
PAGE 19
Omni Register Set ision Table 6 Address (Hex) Device Control Register List (Sheet 9 of 13) Register Name Default (Hex) R/W Description DSP Control Byte 1 64 DSP_Ctrl1 1F RW Bit[7]: Bit[6]: Bit[5]: Bit[4]: Bit[3]: Bit[2]: Bit[1]: Bit[0]: FIFO enable/disable selection UV adjust function ON/OFF selection SDE enable Color matrix ON/OFF selection Interpolation ON/OFF selection Gamma function ON/OFF selection Black defect auto correction ON/OFF White defect auto correction ON/OFF DSP Control Byte 2
PAGE 20
OV7725 Table 6 Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Device Control Register List (Sheet 10 of 13) Address (Hex) Register Name Default (Hex) R/W 6A AWBCtrl2 11 RW Description AWB Control 2 AWB Control 3 20 Bit[7]: AWB mode select 0: Advanced AWB 1: Simple AWB 6B AWBCtrl3 A2 RW 6C AWBCtrl4 01 RW AWB Control 4 6D AWBCtrl5 50 RW AWB Control 5 6E AWBCtrl6 80 RW AWB Control 6 6F AWBCtrl7 80 RW AWB Control 7 70 AWBCtrl8 0F RW AWB Control 8 71 AWBCt
PAGE 21
Omni Register Set ision Table 6 Device Control Register List (Sheet 11 of 13) Address (Hex) Register Name Default (Hex) R/W 88 GAM11 A3 RW Gamma Curve 11th Segment Input End Point 0x60 Output Value 89 GAM12 AF RW Gamma Curve 12th Segment Input End Point 0x70 Output Value 8A GAM13 C4 RW Gamma Curve 13th Segment Input End Point 0x90 Output Value 8B GAM14 D7 RW Gamma Curve 14th Segment Input End Point 0xB0 Output Value 8C GAM15 E8 RW Gamma Curve 15th Segment Input End Point 0xD
PAGE 22
OV7725 Table 6 Address (Hex) Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Device Control Register List (Sheet 12 of 13) Register Name Default (Hex) R/W Description Auto UV Adjust Control 0 9E UVADJ0 11 RW Bit[7:4]: Bit[3:0]: Auto UV adjust offset control 4 LSBs Auto UV adjust threshold control Auto UV Adjust Control 1 9F UVADJ1 02 Bit[7:3]: Bit[2]: Bit[1]: Bit[0]: RW Auto UV adjust value Reserved Auto UV adjust stop control Auto UV adjust offset control MSB DCW Ratio Control
PAGE 23
Omni Register Set ision Table 6 Device Control Register List (Sheet 13 of 13) Address (Hex) Register Name Default (Hex) R/W A8 VSAT 40 RW V Component Saturation Gain Gain × 0x40 A9 HUECOS 80 RW Cosine value × 0x80 AA HUESIN 80 RW Sine value × 0x80 Description Sign Bit for Hue and Brightness AB SIGN 06 RW Bit[7:4]: Bit[3]: Bit[2]: Bit[1]: Bit[0]: Reserved Brightness sign bit Reserved Sign bit for HueSin (in Cr’ equation) Sign bit for HueSin (in Cb’ equation) DSP Auto Function
PAGE 24
OV7725 Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Package Specifications The OV7725 uses a 28-ball Chip Scale Package 2 (CSP2). Refer to Figure 12 for package information, Table 7 for package dimensions and Figure 13 for the array center on the chip. Note: For OVT devices that are lead-free, all part marking letters are lower case. Underlining the last digit of the lot number indicates CSP2 is used.
PAGE 25
Omni Package Specifications ision Sensor Array Center Figure 13 OV7725 Sensor Array Center 3984 µm A1 A2 A3 A4 A5 A6 scan origin (2080.5 µm, 1809.6 µm) array center (88.5 µm, 333.6 µm) 2952 µm package center (0 µm, 0 µm) sensor array OV7725 top view note1 this drawing is not to scale and is for reference only. note2 as most optical assemblies invert and mirror the image, the chip is typically mounted with pins A1 to A6 oriented down on the PCB. Version 1.
PAGE 26
OV7725 Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Chief Ray Angle Figure 14 OV7725 Chief Ray Angle 25.0 20.0 15.0 10.0 5.0 CRA 0.0 0.0 0.5 1.0 1.5 2.0 2.5 7725CSP_DS_014 26 Proprietary to OmniVision Technologies, Inc. Version 1.
PAGE 27
Omni Package Specifications ision IR Reflow Ramp Rate Requirements OV7725 Lead-Free Packaged Devices Note: For OVT devices that are lead-free, all part marking letters are lower case Figure 15 IR Reflow Ramp Rate Requirements 300.0 Z1 Z2 Z3 Z4 Z5 Z6 Z7 end 275.0 250.0 temperature (°C) 225.0 200.0 175.0 150.0 125.0 100.0 75.0 50.0 25.0 time (sec) Table 8 358 369 338 318 298 278 258 238 218 198 178 158 138 118 98 78 58 38 18 -2 -22 0.
PAGE 28
OV7725 Color CMOS VGA OmniPixel2™ CAMERACHIP™ Sensor Omni ision Note: • All information shown herein is current as of the revision and publication date. Please refer to the OmniVision web site (http://www.ovt.com) to obtain the current versions of all documentation. • OmniVision Technologies, Inc. reserves the right to make changes to their products or to discontinue any product or service without further notice (It is advisable to obtain current product documentation prior to placing orders).
PAGE 29
Omni ision TM REVISION CHANGE LIST Document Title: OV7725 Datasheet Version: 1.
PAGE 30
Omni ision TM REVISION CHANGE LIST Document Title: OV7725 (CSP2) Datasheet Version: 1.1 DESCRIPTION OF CHANGES The following changes were made to version 1.
PAGE 31
Omni ision TM DESCRIPTION OF CHANGES (CONTINUED) • In Table 6 on page 14, changed description of register 0x16 from “Reserved” to: Register 16 Bit[7]: Bit[6:0]: • • • • • • • In Table 6 on page 14, changed description of register 0x17 from “Horizontal Sensor Size” to “Horizontal Frame (HREF column) Start 8 MSBs (2 LSBs are at HREF[5:4])” In Table 6 on page 14, changed description of register 0x18 from “Horizontal Frame (HREF column) end high 8-bit (low 2 bits are at HREF[1:0])” to “Horizontal Sensor
PAGE 32
Omni ision TM DESCRIPTION OF CHANGES (CONTINUED) • • In Table 6 on page 17, changed names of registers 0x46, 0x47, 0x48, 0x49, 0x4A, and 0x4B from “LCC0”, “LCC1”, “LCC2”, “LCC3”, “LCC4”, and “LCC5” to “LC_CTR”, “LC_XC”, “LC_YC”, “LC_COEF”, “LC_RADI”, and “LC_COEFB” In Table 6 on page 17, changed description of register 0x47 from “Lens Correction Option 1 – X Coordinate of Lens Correction Center Relative to Array Center” to: X Coordinate of Lens Correction Center Relative to Array Center Bit[7]: Sign bi
PAGE 33
Omni ision TM DESCRIPTION OF CHANGES (CONTINUED) • In Table 6 on page 19, changed description of register DSP_Ctrl4 (0x67) from: DSP Control Byte 4 to: DSP Control Byte 4 Bit[7:3]: Reserved Bit[2]: AEC selection 0: Before gamma 1: After gamma Bit[1:0]: Output selection 00: YUV or RGB 01: YUV or RGB 10: RAW8 11: RAW10 • In Table 6 on page 20, changed description of register AWBCtrl1 (0x69) from: AWB Control 1 to: AWB Control 1 Bit[7:4]: Reserved Bit[3]: G gain enable 0: AWB adjusts R and G gain 1: AW
PAGE 34
Omni ision TM DESCRIPTION OF CHANGES (CONTINUED) • • • • In Table 6 on page 21, changed description of register 0x93 from “Edge Enhancement Strength High Point Control” to “Sharpness (Edge Enhancement) Strength Lower Limit” In Table 6 on page 22, added “gain × 0x20” to description of register CNST (0x9C) In Table 6 on page 22, changed name, default value, R/W status and description of register 0x9D to “RSVD”, “XX”, “–”, and “Reserved”, respectively In Table 6 on page 22, changed description of register
PAGE 35
Omni ision TM DESCRIPTION OF CHANGES (CONTINUED) • • • • • In Table 6 on page 23, changed name of register 0xA9 from “HUE0” to “HUECOS” In Table 6 on page 23, changed name of register 0xAA from “HUE1” to “HUESIN” In Table 6 on page 23, changed description of register 0xA9 from “Hue Control 0” to “Cosine value × 0x80” In Table 6 on page 23, changed description of register 0xAA from “Hue Control 1” to “Sine value × 0x80” In Table 6 on page 23, changed description of register SIGN (0xAB) from: Sign Bit for
PAGE 36
Omni ision TM REVISION CHANGE LIST Document Title: OV7725 (CSP2) Datasheet Version: 1.2 DESCRIPTION OF CHANGES The following changes were made to version 1.1: • Under Key Specifications on page 1, changed Sensitivity from “TBD” to| “3.