Optical disc ICs Post amplifier applicable with 1- bit D / A converter BH3563FV The BH3563FV is a post amplifier applicable with 1-bit D / A converter for compact disc players. Applications Portable CD players, etc. Features 1) 2-channel analog filter IC for 1-bit D / A converters. 2) Internal partial CR for two channels (left and right) LPF. 3) Operates on a single power supply. 4) Operates on a power supply voltage as low as 3.1V. Absolute maximum ratings (Ta = 25C) Recommended operation conditions (Ta = 25C) 133 Optical disc ICs Block diagram 134 BH3563FV Optical disc ICs BH3563FV Pin descriptions 135 Optical disc ICs Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 3.5V, RL = 10kΩ) 136 BH3563FV Optical disc ICs BH3563FV Measurement circuit 137 Optical disc ICs BH3563FV Application example Operation notes (1) When the MUTE pin voltage reaches 1.5V or higher, the output voltage is muted and the bias level is output. (2) Frequency characteristics can be changed by adjusting the capacitor attached to pin 3 (pin18) or pin 5 (pin16). (3) Gain can be changed by attaching a resistor to pin 4 (pin17). 138 (4) To prevent popping sounds due to sudden fluctuation in the mute pin voltage, attach a capacitor (approximately 1µF) to pin 7. (5) Be sure to connect the IC to a 0.1µF bypass capacitor to the power supply, at the base of the IC. Optical disc ICs BH3563FV Electrical characteristic curve External dimensions (Units: mm) 139