LAG673

MITSUMI IC for Headphone Stereos LAG673 IC for Headphone Stereos Monolithic IC LAG673 Outline This IC was developed for use in 3 V headphone stereos. It incorporates dual preamp, power amp, electronic volume and motor control circuits; because it requires extremely few external components, it can be used in a simple circuit configuration. Features 1. Broad operating voltage range of 2.0 to 5.0 V 2. Few external components required 3. Well-balanced electronic VR, A-curve attenuation characteristic obtained with B-curve VR 4. Internal motor control circuit, with noise from motor driving unit suppressed 5. Fast forward possible using the forced-on pin Package SOP-28B (LAG673F) SDIP-30A (LAG673D) Absolute Maximum Ratings Item Operating temperature Storage temperature Power supply current Operating voltage Power consumption Symbol TOPR TSTG VCC Vop Pd Ratings -20~+65 -40~+125 -0.3~+7.5 2.0~5.0 450 (SOP-28B) 750 (SDIP-30A) Units °C °C V V mW MITSUMI IC for Headphone Stereos LAG673 Electrical Characteristics (Except where noted otherwise, Ta=25°C) Symbol ICC Measurement conditions VIN=0V, IM=0mA Vo=-10dBm, RL=∞ Vo=-10dBm 40 THD=10% 0.30 VOUT=400mVrms VIN=0V, Rg=2.2kΩ, BPF=30Hz~20kHz VOUT=-10dBm 18 Rg=2.2kΩ, VOUT=-10dBm 30 VIN=100mVrms Min. Typ. Max. Units 18 25 mA Item Consumption current (excluding motor speed controller unit) Preamp unit (Ta=25°C) Open-circuit gain Closed-circuit gain Maximum output voltage Total harmonic distortion ratio Output noise voltage Input imp...