JRC NJM2768M Datasheet

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NJM2768

HAEDPHONE AMPLIFIER for CD-ROM

GENERAL DESCRPTION

■■■■

NJM2768

The
ROM.
It includes 0dB closed loop gain and mute circuit
which require few external component.

NJM2768

The
It is suitable for CD-ROM , and other general audio
headphone amplifier application.

FEATURES

■■■■

●

Operating Voltage 4.5-5.5V

●

Operating Current 2mA typ., at V

●

Fixed Gain 0dB typ.

●

Stereo Headphone Output

●

Internal Mute Circuit

●

Bipolar Technology

●

Package Outline DMP8

PIN CONFIGURATION

■■■■

BLOCK DIAG RAM

■■■■

is a headphone amplifier designed f or CD-

realizes very low turn-noise at mute mode.

+

=5V

1

2

3

4

8

7

6

5

PACKAGE OUTLENE

■

NJM2768M

PIN FUNCTION

1.OUT1

2.MUTE

3.IN1

4.GND

5.IN2

6.BIAS

7.OUT2

+

8.V

8

7

6

5

BIAS

MUTE

1

23

4

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ABSOLUTE MAXMUM RANGE

■■■■

Supply Voltage V
Power Dissipation P
Operating Temperature Range Topr -40 to +85

Storage Temperature Range Tstg -50 to +150

(note)At on PC board

ELECTRICAL CHARACTERISTICS

■■■■

Operating Voltage V

NJM2768

(Ta=25°C)

PARAMETER SYMBOL RATINGS UNIT

+

D

(V+=5.0V,Vin=0dBV,f=1kHz,RL=32Ω,Ta=25°C unless otherwise specified)

PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT

+

4.5 5.0 5.5 V

(DMP8) 375
750 (note)

+7 V

mW

°

C

°

C

Operating Current I
Reference Voltage Vref No Signal - 2.1 - V
Closed Loop Gain G
Channel Balance
Output Power PO1

Total Harmonic Distortion THD - 0.02 0.1 %
Output Noise Voltage Vno
Mute Attenuation ATT Vo/Vin - -80 -70 dB

Channel Separation CS 90 110 - dB
Ripple Rejection Ratio RR
Input Voltage H-level V
Input Voltage L-level V

COMTROL PIN INFOMETION

■■■■

PARAMETER CONTROL SIGNAL OPERATING CONDITION

MUTE ON

MUTE OFF

CC

V

∆

G

V

PO2

IH

IL

LNON-SIGNAL

H OUTPUT SIGNAL

No Signal - 2.0 4.0 mA

-1 0 1 dB

-0.5 0 +0.5 dB
R

=32Ω, THD=1%

L

R

=16Ω, THD=1%

L

Rg=0Ω, A-Weighted

Vripple=-20dBV, Rg=0

2.0 - V

0.0 - 0.3 V

Ω

30 50 - mW
40 100 - mW

-

-70-dB

-104
(6.3)

-94

(20)

(µVrms)

+

dBV

V