NJM2777 Datasheet, PDF (1/15 Pages) New Japan Radio – Headphone Amplifier with Electronic Volume

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
8 to 10 V
+20dB to -80dB
DIP14, DMP14, SSOP14
CNTa CAPa
I PACKAGE OUTLINE
NJM2777D NJM2777M NJM2777V
Mute
Mute
IN a
VOL
OUTa
IN b
VOL
OUTb
Bias
Vref
I PIN FUNCTION
1
7
CNTb CAPb V+ GND
No. SYMBOL
FUNCTION
1
V+ Power Supply
No. SYMBOL
FUNCTION
8
N.C. No connecting
14
2 OUTb Bch Output
9
Vref Reference voltage stabilized
capacitor connect terminal
3 CNTb Bch Volume control voltage 10
input
INa Ach Input
4 CAPb Bch Volume control click 11 CAPa Ach Volume control click
noise absorbing capacitor
noise absorbing capacitor
connect terminal
connect terminal
5
INb Bch Input
12 CNTa Ach Volume control voltage
8
6 Mute Mute control
input
13 OUTa Ach Output
7
N.C. No connecting
14 GND Ground
–1–