140

Optical disc ICs

Headphone amplifier with internal

LPF and EVR for CD-ROM

BA3530FS

The BA3530FS is an H / P amplifier with internal secondary LPF and EVR circuits. When multibit output from a D / A

converter is input, the secondary LPF outputs an audio signal. The amplifier circuit allows for line output and headphone

output. The output level for headphones can be changed with the EVR circuit. This IC also has independent internal mute

circuits for the left and right channels.

FApplications

CD-ROM drives and other products (with line and headphone output pins) that process digital audio signals

FFeatures

1) Internal LPF, line amplifier and EVR.

2) Internal mute function.

3) Internal thermal shutdown circuit.

4) No attached components are needed for oscillation

prevention, even at a load of 8

Ω.

5) Mute function reduces the popping noises that can

occur when the power is turned on and off.

FAbsolute maximum ratings (Ta = 25_C)

FRecommended operating conditions