Optical disc ICs Ripple filter for portable CD players BA3990F The BA3990F is a ripple filter for portable CD players that operate off two batteries. Applications Portable CD players and headphone stereos Features 1) Facilitates ripple filter design. 2) Low current consumption. Absolute maximum ratings (Ta = 25C) Recommended operating conditions (Ta = 25C) 682 Optical disc ICs BA3990F Block diagram Electrical characteristics (unless otherwise noted, Ta = 25C and VCC = 3.5V) 683 Optical disc ICs Measurement circuit Application example 684 BA3990F Optical disc ICs BA3990F Electrical characteristic curves External dimensions (Units: mm) 685