BA7725S - Rohm

BA7725S Analog compander for KARAOKE echo systems

Pin No. BA7725S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 BA7725FS 1 2 — 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 — 19 20 Pin name LINE OUT LINE IN N.C. ECHO LEV CTRL GND LOOP GAIN CTRL EXP DET EXP DET CT EXP BF OUT EXP BF IN DLY BF OUT DLY BF IN CMP BF OUT CMP BF IN CMP OUT CMP DET CT CMP DET RIPPLE FITER VCC N.C. MIC AMP OUT MIC AMP IN Micr.

Features

• 1) Internal logarithmic 1 / 2 compression circuit and 2 × expansion circuit 2) Internal 2-channel buffer amplifier used as a tertiary low pass filter 3) Internal mixer amplifier that mixes line input and microphone input 4) Internal electronic volume control allows for adjustment of the echo mixer level and loop mixer level using an external DC voltage. 5) Internal microphone amplifier and microphone input ON / OFF switch
•Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation BA7725S BA7725FS Symbol VCC Pd Tstg Topr Limits 13 1000∗1 600∗2
  – 55 ~ + 125
  – 10 ~.