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PDF LC898212XA Data sheet ( Hoja de datos )
| Número de pieza | LC898212XA | |
| Descripción | AF Control LSI | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Ordering number : ENA2118A
LC898212XA
CMOS LSI
AF Control LSI
http://onsemi.com
Overview
The AF control device, LC898212XA (LC898212XA-MH), provides an ideal way to implement the reduced power
consumption and the improved autofocus precision and speed (reduced convergence time) required in high-pixel-
count camera modules for use in smartphones.
The LC898212XA integrates on a single chip an equalizer circuit employing digital calculation, and it can be
combined with position sensors to build a closed-loop actuator control system. Since closed-loop control provides
better ability to maintain the control object than conventional open-loop systems and is not affected by position
differences, the LC898212XA is ideal for use in AF systems used in a wide variety of cameras. A closed-loop system
uses position sensors for position control, and power consumption is lower than with conventional open-loop control,
which uses current values for position control.
In addition, a new PWM drive system employed suppresses noise that could affect image quality while achieving
reduced power consumption, making this IC ideal for use in mobile devices such as smartphones. The filter
coefficients of the equalizer circuit can be adjusted to any values desired by making register settings via I2C
communication. This makes it possible to build a control circuit optimized to the various types of actuators and
thereby achieve faster autofocus (reduced convergence time) performance.
The integrated ADC provides up to 10-bit precision for highly accurate AF position control. Also integrated on-chip
are a constant current supply DAC for drive and an op-amp with adjustable gain for use with the position sensors
indispensable for building a closed-loop control system.
* I2C Bus is a trademark of Philips Corporation.
Semiconductor Components Industries, LLC, 2013
June, 2013
91212HK/82912HKPC 20111107-S00001 No.A2118-1/5
1 page  
LC898212XA
ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number
of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at
www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no
warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the
application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental
damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual
performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical
experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use
as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in
which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for
any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors
harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or
death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the
part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PS No.A2118-5/5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet LC898212XA.PDF ] | |
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