NJM2171A
LOW VOLTAGE HEADPHONE AMPLIFIER for PORTABLE AUDIO
a73 GENERAL DESCRIPTION a73 PACKAGE OUTLINE
The NJM2171A is a low voltage headphone amplifier
designed for portable audio items.
The NJM2171A operates directly for battery supply. It
includes mute and standby circuit which require few external
components and realize low current consumption and very low
turn-noise at standby mode.
It is suitable for portable Mini-Disc, portable Compact-Disc,
and other headphone amplifier application.
a73 FEATURES
a71 Operating Voltage V
+
1=1.8 to 4.5V
V
+
2=0.9 to 4.5V
a71 Operating Current 450?A typ. @V
+
1=2.3V
700?A typ. @V
+
2=1.2V
a71 Supply Current in Power Down Mode
10?A typ. @V
+
1=2.3V
25?A typ. @V
+
2=1.2V
a71 Output Power Exceeds 5mW R
L
=16? @THD=10%
a71 Fixed Voltage Gain 11.5dB typ.
a71 Package Outline VSP10
a71 Bipolar Technology
a73 PIN CONFIGURATION
BIAS
1
2
3
4
10
9
8
7
MUTE
6
AMP1
5
AMP2
NJM2171AR
PIN FUNCTION
1.V
+
2
2.OUT1
3.IN1
4.STBY
5.V
+
1
6.V
REF
7.MUTE
8.IN2
9.OUT2
10.GND
