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VB6851
QXGA camera module with auto focus
Data Brief
Features

3.15 megapixel resolution sensor (2048 x 1536) Integrated auto-focus mechanism High level autofocus control interface 4 element lens Compact size: 8.5 mm x 8.5 mm x 5.9 mm Compatible with SMIA 1.0 profile 2 functional specification Video data interface - CCP2.0 Command interface - CCI Analog power supply from 2.4 V to 2.9 V Digital power supply from 1.7 V to 2.9 V On-board 10 bit ADC Integral EMC shielding and EMI reduction techniques Ultra low power standby mode Analog binning (2x2, 2x4) for low power video mode
PC00
accelerator (e.g. STV0986 ) or application engine (e.g. STn8815) device can be incorporated in the phone system to run the algorithms in hardware. The specifications of these devices are contained in a separate document. The module design is optimized for both footprint and height. The auto-focus mechanism combined with a multi-element lens provides excellent image quality at focus distances from less than 10 cm to infinity. All external components, including the auto-focus actuator drivers, are integrated inside the camera module, apart from two CCI pull-up resistors. VB6851 offers an ultra low power consumption hardware standby mode consuming less than 30 W (typ.).
Description
This databrief outlines a high performance 3.15 megapixel auto-focus camera module (VB6851) for use across a range of mobile phone handsets and accessories. It is designed to be used for both high quality stills capture and video modes. The module is SMIA 1.0 profile 2 compatible and is capable of generating raw bayer 3 MP images up to 20 fps. The VB6851 supports the CCI control and CCP 2.0 data interfaces. As different phone platforms have different baseband processors with varying capabilities, it may not be possible for all phones to support the associated image processing and auto-focus algorithms. Where the baseband cannot support this processing load, a separate hardware
February 2008
Rev 1
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www.st.com
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For further information contact your local STMicroelectronics sales office.
Overview
VB6851
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Figure 1.
Overview
System diagram Figure 2. Block diagram VB6851
EXTCLK XSHUTDOWN PLL and clock management Power Mgmt Power-on reset Readout Line SRAM X Decoder Column ADC 2056 x 1544 Pixel array VDIG DGND VCAP VANA AGND
VB6851
3 megapixel auto-focus camera module
EXTCLK XSHUTDOWN CCI (SLC + SDA) CCP 2.0 (CLKP CLKN) ,
STV0986 Imaging system controller or baseband or application processor (STn8815)
GR SCL SDA Sensor control registers Dark Cal CLKP CLKN DATAP DATAN Scaling CCP2 TX Defect Correction Output De-rating Output Formatter Y Decoder Readout CCI Slave
Column ADC X Decoder Line SRAM
Table 1.
Technical specifications
Parameter Description 2048 x 1536 (QXGA) ST IMG175 process 1.75 m x 1.75 m + 81 dB + 24 dB (max) + 6 dB (max) 60 dB 36 dB (@ 100 lux) Analog: 2.4 V - 2.9 V Digital: 1.7 V - 1.9 V <150 mW in infinity <350 mW at macro including actuator current 8.5 mm x 8.5 mm x 5.9 mm 51 +/- 2 HFOV F/2.8 <|1.0%| 45 % (typ.) SMIA85 auto-focus SMIA85 socket
Pixel resolution Sensor technology Pixel size Exposure control Analog gain Digital gain Dynamic range Signal to noise Supply voltages Average power consumption 20fps Package size (lxwxh) Lens TV distortion Relative illumination Package type System attach
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VB6851
Ordering information
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Ordering information
Table 2. Order codes
Package SMIA85AF with CCP2 I/F with socket Tape and reel Packing
Order code VB6851S0VO/T2(1)
1. ECOPACK(R) package
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Revision history
Table 3.
Date 07-Feb-2008
Document revision history
Revision 1 Initial release. Changes
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VB6851
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