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LC898212XA fiches techniques PDF

Sanyo - AF Control LSI

Numéro de référence LC898212XA
Description AF Control LSI
Fabricant Sanyo 
Logo Sanyo 





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LC898212XA fiche technique
Ordering number : ENA2118A
LC898212XA
CMOS LSI
AF Control LSI
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.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment. The products mentioned herein
shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life,
aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system,
safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives
in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any
guarantee thereof. If you should intend to use our products for new introduction or other application different
from current conditions on the usage of automotive device, communication device, office equipment, industrial
equipment etc. , please consult with us about usage condition (temperature, operation time etc.) prior to the
intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely
responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
91212HK/82912HKPC 20111107-S00001 No.A2118-1/5

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