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PDF NJU72010 Data sheet ( Hoja de datos )
| Número de pieza | NJU72010 | |
| Descripción | 2Vrms Ground Referenced Stereo Line Amplifier | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJU72010
2Vrms Ground Referenced Stereo Line Amplifier with LPF
s GENERAL DESCRIPTION
The NJU72010 is an audio line Amplifier .
It can swing 2Vrms (5.6V peak-to-peak) signal at 3.3V
operating voltage.
Ground-referenced outputs eliminate output coupling
capacitor. The pop noise suppression circuit removes a pop
noise at the power-on and power-off.
It is suitable for audio line interface of audio equipment
which does not have over 9V regulator.
s PACKAGE OUTLINE
NJU72010RB2 NJU72010V
s APPLICATIONS
q Audio applications requiring 2Vrms outputs
s FEATURES
q Operating Voltage
q Operating Current
q Output Coupling Capacitor-less
q Pop Noise Suppression Circuit
q LPF
q C-MOS Technology
q Package Outline
+2.7 to +3.6V
IDD=5mA typ.
at V+=3.3V, RL=47kΩ, No Signal
TVSP10, SSOP14
s BLOCK DIAGRAM
V+
INL OUTL
Mute Tr
INR
MUTE
OUTR
Bias
Pop Noise
Suppression
Mute Tr
Charge Pump
V-
GND
CP CN
Ver.2.2E
–1–
1 page  
TEST CIRCUIT (VMUTE)
NJU72010
47kΩ
1uF
C2
INL
1
INR
10
1uF
C8
V
V+
10uF
C11
2 OUTL
Mute-Tr
Mute-Tr
OUTR 9
3 V+
Pop Noise
Suppression
GND 8
V
4 CP
1uF
C4
Charge
Pump
5 CN
Bias
MUTE 7
V- C6 10uF
6
47kΩ
TEST CIRCUIT (VNO)
VNO=(measurement)-Gv1
47kΩ
1uF
C2
INL
1
INR
10
1uF
C8
V
V+
10uF
C11
2 OUTL
Mute-Tr
Mute-Tr
OUTR 9
3 V+
Pop Noise
Suppression
GND 8
V 47kΩ
V+
4 CP
1uF
C4
Charge
Pump
5 CN
Bias
MUTE 7
V- C6 10uF
6
–5–
5 Page 
NJU72010
1.2 Control of V+ terminal and Mute terminal
1.2.2 Power-on procedure
1. Turn on the V+.
2. After 100msec from power on, change the control voltage of MUTE terminal (Vcnt) from "Low" to
"High".
* It is necessary to stabilize an IC for 100msec.
By releasing the MUTE function, the output terminal output the signal.
1.2.3 Power-off procedure
1. Change the control voltage of MUTE terminal (Vcnt) from "High" to "Low".
By the MUTE function, the output signals are stopped from output terminal.
2. Turn off the V+ after “2RC” sec from MUTE.
* It is necessary to stabilize a MUTE condition for “2RC” sec.
Ex.) R2=22kΩ, C7=4.7uF -> 2R2 x C7=200msec
V+
(3pin
Vcnt
100msec
200msec
MUTE
MUT
(7pin)
MUTE
MUTE
Fig.5 Power-on / Power-off timing chart
t
t
t
– 11 –
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet NJU72010.PDF ] | |
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