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BA6387K Datasheet

Part Number BA6387K
Manufacturers Rohm
Logo Rohm
Description Preservo amplifier for CD players
Datasheet BA6387K DatasheetBA6387K Datasheet (PDF)

BA6387K Optical disc ICs Preservo amplifier for CD players BA6387K The BA6387K is a preservo amplifier for CD players. By using this paired with a ROHM DSP, a servo and main signal system can be configured with few external components and low power consumption. !Applications CD players !Features 1) Internal RF and AGC circuits. 2) Internal APC circuit. 3) Internal auto asymmetry circuit. 4) Internal disc defect detector. 5) Internal focus protect function against disc defects. !Absolute max.

  BA6387K   BA6387K






Preservo amplifier for CD players

BA6387K Optical disc ICs Preservo amplifier for CD players BA6387K The BA6387K is a preservo amplifier for CD players. By using this paired with a ROHM DSP, a servo and main signal system can be configured with few external components and low power consumption. !Applications CD players !Features 1) Internal RF and AGC circuits. 2) Internal APC circuit. 3) Internal auto asymmetry circuit. 4) Internal disc defect detector. 5) Internal focus protect function against disc defects. !Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 9 400* -25~+75 -55~+125 Unit V mW ˚C ˚C * Reduced by 4mW for each increase in Ta of 1˚C over 25˚C. !Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Symbol VCC Limits 2.4~5.5 Unit V BA6387K Optical disc ICs !Block diagram CAGC RFO ASY PLH BLH RFRFI VCC 24 23 22 21 20 19 18 18 17 45µ B 2k 25 2k 60k − + 20k EFM 20k − + DET BLOCK 16 20k A 26 20k − + 10k 44.7k PS PL BL BS MIRR 20k 20k 20k 20k 2k 2k − + 60k 10k + − 15 39k C 27 39k + − 44.7k 0.6V + − + DEFECT 14 160k + − 30p D 28 − FE 13 SCRATCH CONTROL FOK 160k 30p + − FOK HOLD BLOCK 29 LOOP ON VB + 10k FEB FOK 12 100k 100k − FOCUS BIAS FOCUS SWITCH GAIN 6dB 5p TEO 20k BL 20k − + + − FON RAMP OSC 11 + − 30 0.2V FE' 31 TE TEO 13.3k 10 + − 10k 50k 12p − + 2k 32 2k 402k + − 10k 12p 50k 5p 18 100k E.


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