NJM2761RB2 [NJRC]
The Audio Limiter for Speaker Protection; 音频限制器以保护扬声器
| 型号： | NJM2761RB2 |
| 厂家： | 
NEW JAPAN RADIO |
| 描述： | The Audio Limiter for Speaker Protection |
| 文件： | 总7页 (文件大小：202K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NJM2761
Audio Limiter
■ GENERAL DESCRIPTION
■ PACKAGE OUTLINE
The NJM2761 is the audio limiter for speaker protection.
The limit level is adjustable by external resistor.
It is suitable for PC, potable audio and others.
NJM2761RB2
■ FEATURES
■ Wide Operating Voltage
+2.7V to +13.0V
■ Variable Limit Level by external resistor 0.2 to1V
■ Low Output Noise
■ Bipolar Technology
■ Package Outline
-90dBV max.
TVSP10
■ PIN CONFIGURATION
1. V+
2. OUTa
3. INa
10
9
1
2
3
4. INT
5. VREF
6. SENCE
7. SW
8. INb
9. OUTb
10. GND
8
7
4
5
6
■ BLOCK DIAGRAM
Vcc
Vref
INa
INb
OUTa
OUTb
SW
INT
SENSE
- 1 -
NJM2761
■ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER
SYMBOL
V+
RATINGS
14
UNIT
V
Supply Voltage
Power Dissipation
PD
320
mW
°C
Operating Temperature Range
Storage Temperature Range
Topr
-20 to +75
-40 to +125
Tstg
°C
■ELECTRICAL CHARACTERISTICS
■ POWER SUPPLY (Ta=25°C, V+=5V unless otherwise specified)
PARAMETER
Operating Voltage
SYMBOL
V+
TEST CONDITION
-
MIN.
2.7
-
TYP.
5.0
MAX.
13.0
2.0
UNIT
V
Operating Current
Reference Voltage
ICC
No Signal
No Signal
1.5
mA
V
Vref
2.2
2.5
2.7
■ AC CHARACTERISTICS
(Ta=25°C, V+=5V, VIN=1Vrms/f=1kHz, Rsense=20kΩ, BW=400-30kHz unless otherwise specified)
PARAMETER
Limit Level 1
SYMBOL
GLIM1
TEST CONDITION
MIN.
150
0.7
TYP.
200
1.0
MAX.
250
1.3
UNIT
mVrms
Vrms
Limit Level 2
Limit Off
GLIM2
V+=13V, Rsense=4kΩ
SW=2V
0.9
1.0
1.1
Vrms
GOFF
-100
(10)
-90
(31.6)
dBV
(µVrms)
RS=0Ω, A-weighting,
VIN=2Vrms
Output Noise
VNO
-
Total Harmonic Distortion
Cross Talk
THD+N
CT
-
-
-
-
1
%
-70
dB
dBV
(µVrms)
-70
(316)
Ripple Rejection
RR
Vripple=100mVrms, f=1kHz
-
-
■ CONTROL CHARACTERISTICS (Ta=25°C, V+=5V unless otherwise specified)
PARAMETER
Low Level Input Voltage
High Level Input Voltage
SYMBOL
VIL
TEST CONDITION
MIN.
-
TYP.
MAX.
0.5
-
UNIT
V
-
-
-
-
VIH
2.0
V
■CONTROL TERMINAL EXPLANATION
SW(7pin)
MODE
STATUS
NOTE
Limiter ON
L
Limiter is active.
Limiter is not active.
Limiter OFF
H
- 2 -
NJM2761
■TERMINAL DESCRIPTION
No.
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
1
V+
Power Supply Terminal
-
OUTa
OUTb
2
9
OUTa
OUTb
Ach Output Terminal
Bch Output Terminal
V+/2
V+/2
0.7V
V+/2
100
1k
INa
INb
3
8
INa
INb
Ach Input Terminal
Bch Input Terminal
96k
48k
INT
400
Smoothing Capacitor Connection
Terminal
4
INT
300k
VREFIN
300k
Reference Voltage Stabilizing
Capacitor Connection Terminal
5
VREFIN
300k
- 3 -
NJM2761
■TERMINAL DESCRIPTION
No.
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
Resister Connection Terminal
for Limit Level Setting
6
SENSE
0V
SW
7
SW
Limiter ON/OFF Switch
-
150k
270k
10
GND
Ground Terminal
-
- 4 -
NJM2761
■APPLICATION CIRCUIT
V+
0.22µF
GND
10
9
1
2
3
4
5
V+
1µF
1µF
OUTb
INb
OUTa
INa
0.22µF
0.22µF
8
0.022µF
SW
7
INT
0.22µF
SENSE
VREF
6
RSENSE
R
SENSE = 4000 / VLIMIT [Ω]
- 5 -
NJM2761
■TYPICAL CHARACTERISTICS
V+ - Icc
Icc-Temperature
V+=5V,No-Signal,Limiter=ON,Rsense=20k Ω
V+=5V,No-Signal,Limiter=ON,Rsense=20k Ω
2
1.5
1
2
1.5
1
0.5
0
0.5
0
0
5
10
15
-20
0
20
40
60
80
Temperature [Co]
Vcc[V]
Limit Response-V+
Limit Response-Rsense
V+=5V,f=1kHz,Limiter=ON
Vin=0dBV,Limiter=ON,Rsense=20k Ω
Rsense=4k
1
1
V+=5.0V
V+=2.7V
Rsense=8k
Rsense=20k
0.1
0.1
V+=13.0V
0.01
0.01
0.01
0.1
1
0.01
0.1
1
Input[Vrms]
Input[Vrms]
Limit Response-Temperature
Vom
V+=5V,Vin=0dBV,Limiter=ON,Rsense=20k
Ω
f=1kHz,Limiter=OFF,Rsense=20k Ω
10
1
1
V+=2.7V
V+=5.0V
75Co
-20Co
V+=13.0V
25Co
0.1
0.1
0.01
0.01
0.01
0.1
1
0.0001 0.001
0.01
0.1
1
Input[Vrms]
Input[Vrms]
- 6 -
NJM2761
■TYPICAL CHARACTERISTICS
THD-Vcc
THD-Temperature
V+=5V,Vin=0dBV,Limiter=ON,Rsense=20k
Ω
f=1kHz,Limiter=ON,Rsense=20k
Ω
10
1
10
1
V+=2.7V
V+=5.0V
V+=13.0V
-20Co
0.1
0.01
0.1
0.01
75Co
25Co
0.001
0.01
0.1
1
0.001
0.01
0.1
1
Input[Vrms]
Input[Vrms]
Ripple Rejection
Cross Talk
V+=5V,Vin=0dBV,Limiter=ON,Rsense=20k
Ω
V+=5V,Vripple=100mVrms,Limiter=ON
-60
-65
-70
-75
-80
-85
-90
-95
-100
0
-20
-40
25Co
25Co
-20Co
75Co
-60
-80
-20Co
75Co
-100
100
1000
Frequency[Hz]
10000
100
1000
10000
Frequency[Hz]
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
- 7 -
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