MITSUMI

IC for Headphone Stereos (bass boost) LAG668

IC for Headphone Stereos (bass boost)

Monolithic IC LAG 668

Outline

This IC was developed to provide bass boost functions without deviating from the basic design concept of

Mitsumi's LAG665, which is highly regarded for applications in headphone stereos for overseas markets in

particular.

Bass boost functions are widely adopted in models for overseas markets as well. However, because of

stringent cost constraints, there has been a need for an IC which is simple and inexpensive. This IC can

provide bass boost functions simply by adding three resistors and one capacitor (per channel).

Moreover, it has the same pinout as the LAG665, so that by making selective use of set features, a product

lineup can be developed without changes to the printed circuit board.

Features

Package

Absolute Maximum Ratings

1. Configuration: pre and power amps, motor control, E. VR, bass boost

2. Preamp off function convenient for use in models with radios

3. Independent motor control circuit

1. Motor noise is effectively suppressed

2. With motor on/off pin (motor can be stopped easily when radio is in use)

3. With fast forward pin

4. Bass boost frequency characteristic can be changed simply by changing the resistance multiplier.

5. Well-balanced E. VR circuit

1. L, R channels variable using a single VR

2. A-curve can be reproduced using B-curve VR

6. Few external components

SOP-28B (LAG668F)

SDIP-30A (LAG668D)

Item

Symbol

Ratings

Units

Operating temperature

-20~+65

Storage temperature

-40~+125

Power supply current

-0.3~+7.5

V

Power consumption

Pd

DIP : 750, SOP : 450

mW

Operating voltage

Vop

+2.0~+5.0

V