ROHM BA3574BFS Datasheet

Audio ICs

Low-current audio headphone driver

BA3574BFS

The BA3574BFS is a headphone driver with a fixed-gain bass boost circuit and an AVC circuit that keeps the output
below a fixed level. It features low current dissipation, and low output noise, and is ideal for use in portable digital audio
equipment.

Applications
Portable CD and MD players

Features

1) Low current dissipation (when V
cent current is 4.9mA).

2) Suitable for use in digital audio equipment (voltage
gain: G
102dBm typ.).

3) Bass boost circuit.

4) AVC (Auto V olume Control) circuit, for output limiting.

V = 11.8dB, output noise voltage: VNO =

CC = 2.4V , the quies-

5) Standby switch.

6) Mute switch.

7) Ripple filter.

8) No output coupling capacitor required.

9) Beep circuit.

10) SSOP-A20 package.

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Audio ICs BA3574BFS

FBlock diagram

FAbsolute maximum ratings (Ta = 25_C)

FRecommended operating conditions (Ta = 25_C)

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Audio ICs BA3574BFS

FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 2.4V, RL = 16Ω, f = 1kHz, and BB = OFF)

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Audio ICs BA3574BFS

Measurement circuit

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