NJM2772 Datasheet, PDF (1/4 Pages) New Japan Radio – LOW-VOLTAGE HEADPHONE AMPLIFIER for PORTABLE-AUDIO

NJM2772
LOW-VOLTAGE HEADPHONE AMPLIFIER for PORTABLE-AUDIO
s GENERAL DESCRIPTION
The NJM2772 is a low voltage headphone amplifier for
portable audio.
The NJM2772 includes mute circuit, center amplifier and
beep input, reduce the external parts, standby circuit and
center amplifier with ON/OFF, applies to low current
consumption. The mute function reduces the turn-noise at
standby mode.
The NJM2772 is suitable for portable MD, CD, and others
portable audio system with headphone amplifier.
s PACKAGE OUTLINE
NJM2772V
s FEATURES
q Operating Voltage
q Operating Current
q Low Standby Current
q High Output Power
q Fixed Gain
q Package Outline
q Bipolar Technology
V⁺=1.8-4.5V
1.2mA typ. @Center Amp. Off
2.0mA typ. @Center Amp. On
18µA typ.
6mWmin. @R_L=16Ω, THD=10%
11.5dB typ.
SSOP14
s PIN CONFIGURATION & BLOCK DIAGRAM
STBY 1
INA 2
CenterSW 3
Vref ⁴
BEEP 5
INB 6
MUTE 7
+
PA-A
Vref
PA-C
+
PA-B
14 DNC
13 OUTA
12 V⁺
11 OUTC
10 GND
9 OUTB
8 MuteTC
Note)DNC(14pin):Do not connect
Pin Function
1.STBY
2.INA
3.CenterSW
4.V_REF
5. BEEP
6.INB
7.MUTE
8.MuteTC
9.OUTB
10.GND
11.OUTC
12. V⁺
13.OUTA
14.DNC
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