M52957AFP

M52957AFP Distance Detection Signal Processing for 3V Supply Voltage REJ03F0069-0100Z Rev.1.0 Sep.19.2003 Description M52957AFP is a semiconductor integrated circuit containing distance detection signal processing circuit for 3V supply voltage. This device transforms each optical inflow current I1 and I2 from PSD SENSOR into the voltage, and integrates that output after doing calculation corresponds to I1/(I1+I2), and outputs it as the time data(pulse term). Features Wide supply voltage range Vcc=2.2 to 5.5V Includes clamp level switching circuit (Switch is 16 kinds by outside control) Includes STANDBY function Includes POWER ON RESET function Application Auto focus control for the CAMERA Sensor for short distance etc Recommended Operating Condition Rated supply voltage 3.0V Supply voltage 2.2 to 5.5V Rev.1.0, Sep.19.2003, page 1 of 13 M52957AFP Pin Configuration PSDN CHN Vcc (TESTN) NC 1 2 16 15 PSDF CHF GND1 (TESTF) NC M52957AFP 3 4 5 6 7 8 14 13 12 11 10 9 STB CINT RESET SOUT GND2 CLALV HOLD INT Outline Note: pin4,13 is connected only engineering sample 16P2E Block Diagram Vcc 3 TESTN CHN 2 PSDN 1 STATIONARY LIGHT REMOVE HOLD HOLD I2 STATIONARY LIGHT REMOVE I/V TRANSFORM AMP I1 I/V TRANSFORM AMP PULSE WIDTH TRANSFORM (DOUBLE INTEGRATION) NC 4 CINT 6 BIAS RECKON I1 I1+I2 REFERENCE VOLTAGE PSDF 16 CHF 15 CLAMP CIRCUIT CLAMP LEVEL SWITCHING 13 NC HOLD TESTF SEQUENTIAL CONTROL LOGIC...