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LC898212XA - AF Control LSI

Description

I INPUT O OUTPUT B BIDIRECTION LC898212XA TYPE P Power supply, GND NC NOT CONNECT I2C interface I2CCK I2CDT B I2C Clock pin B I2C Data pin D/A interface BIASO O D/A output (Hall bias input) Op-Amp interface OPINP OPINM I I Op-Amp input Op-Amp input Driver interface OUT1 OUT2 O Actuator out

Features

  • Built-in equalizer circuit using digital operation AF control equalize circuit Any coefficient can be specified by I2C I/F.
  • I2C Interface.
  • Built-in A/D converter Maximum 10-bit Input 2 channel.
  • Built-in D/A converter 8-bit Output 2-channel (Hall offset, Constant current Bias).
  • Built-in OP Amp 1 channel Hall Amp.
  • Built-in OSC 48MHz (Frequency adjustment function).
  • Built-in PWM pulse generator circuit PWM circuit for AF control.

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Full PDF Text Transcription

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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-pixelcount 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.
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