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PDF NJM2777 Data sheet ( Hoja de datos )
| Número de pieza | NJM2777 | |
| Descripción | Audio Amplifier / DIP14 / DMP14 / SSOP14 | |
| Fabricantes | JRC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJM2777 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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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
INa Ach Input
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–
1 page  
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TEST CIRCUIT 3 (Icc)
NJM2777
Input B
CNT B
Output B
Rg=600Ω
1µF
VCNTB
100Ω
100µF
0.47µF
765
N.C. Mute INb
432
CAPb CNTb OUTb
1
V+
V+
[Icc]
10µF
VOL
VOL
Bias
N.C. Vref
89
INa CAPa CNTa OUTa GND
10 11 12 13 14
0.47µF
100µF
10µF
Rg=600Ω
1µF
VCNTA
Output A
100Ω
Input A
CNT A
–5–
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I TERMINAL DESCRIPTION
PIN
NO.
SYMBOL
FUNCTION
6 Mute Mute Control
9
Vref
Reference voltage stabilized
capacitor connect terminal
NJM2777
EQUIVALENT CIRCUIT
TERMINAL
VOLTAGE
Mute
200
400k
GND
Vref
100k
200
100k
V+/2
– 11 –
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet NJM2777.PDF ] | |
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