NJM2777
Headphone Amplifier with Electronic Volume
I
GENERAL DESCRIPTION
NJM2777
is a headphone amplifier with electronic volume. It
includes widely gain adjustable volume, +20 to –80 dB, and mute
function. These are controlled by DC voltage. The
NJM2777
is
suitable for headphone output on TV set.
I
FEATURES
G
Operating Voltage
G
Electronic Volume
G
Mute Function
G
Bipolar
G
Package Outline
I
BLOCK DIAGRAM
CNTa CAPa
Mute
I
PACKAGE OUTLINE
NJM2777D
NJM2777M
NJM2777V
8 to 10 V
+20dB to -80dB
DIP14, DMP14, SSOP14
Mute
IN a
VOL
OUTa
IN b
VOL
OUTb
Bias
Vref
CNTb CAPb
I
PIN FUNCTION
No.
1
1
14
2
3
4
5
7
8
6
7
SYMBOL
V+ GND
V+
OUTb
CNTb
CAPb
INb
Mute
N.C.
FUNCTION
Power Supply
Bch Output
Bch Volume control voltage
input
Bch Volume control click
noise absorbing capacitor
connect terminal
Bch Input
Mute control
No connecting
No.
8
9
10
11
12
13
14
SYMBOL
N.C.
Vref
INa
CAPa
CNTa
OUTa
GND
FUNCTION
No connecting
Reference voltage stabilized
capacitor connect terminal
Ach Input
Ach Volume control click
noise absorbing capacitor
connect terminal
Ach Volume control voltage
input
Ach Output
Ground
–1–
NJRC [ NEW JAPAN RADIO ]
