NJM2762V [NJRC]
Audio Amplifier, 2 Channel(s), 1 Func, Bipolar, PDSO14, SSOP-14;
| 型号： | NJM2762V |
| 厂家： | 
NEW JAPAN RADIO |
| 描述： | Audio Amplifier, 2 Channel(s), 1 Func, Bipolar, PDSO14, SSOP-14 放大器 光电二极管 商用集成电路 |
| 文件： | 总9页 (文件大小：146K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NJM2762
2-Channel Audio Limiter
Q PACKAGE OUTLINE
Q GENERAL DESCRIPTION
NJM2762 is a 2-channel audio limiter IC that will
consistently monitor the amplitude of the input audio signals
and prevent them from exceeding a certain limit level.
NJM2762 will sense both input channels separately and
when either input signals exceeded the preset limit level, it will
reduce the gain of both channels together, such that the
output is always balanced and limited to the desired level.
The amount of attenuation will depend on the channel that has
the worst overshoot condtion.
NJM2762RB2
MSOP10 (TVSP10)
NJM2762V
(SSOP14)
The limit level of NJM2762 can be adjustable by external
resistor - making it is suitable for PC application and any audio
products that required speaker protection at the back-end.
Q FEATURES
O Wide Operating Voltage
2.7V to 13.0V
O Variable Limit Level by external resistor 0.18V to 1V
O Low Output Noise
O Bipolar Technology
O Package Outline
-90dBV max.
MSOP10 (TVSP10)*
SSOP14
*MEET JEDEC MO-187-DA / THIN TYPE
Q BLOCK DIAGRAM
VREF
VREF
INA
INB
OUTA
SW
ON/OFF
Sense Vref
OUTB
Limiter Level
INT
SENSE
– 1 –
Ver.0.6E
NJM2762
Q PIN CONFIGURATION
MSOP10 (TVSP10)
10
6
1
5
No.
Symbol
Function
1
2
V+
OUTa
INa
Power Supply Terminal
Ach Output Terminal
3
Ach Input Terminal
4
INT
Ach Smoothing Capacitor Terminal
Reference Voltage Terminal
Preset Limit Level Terminal
Limiter On/Off Control Terminal
Bch Output Terminal
5
VREF
SENSE
SW
6
7
8
INb
9
OUTb
GND
Bch Input Terminal
10
Ground
SSOP14
1
14
7
8
No.
Symbol
Function
1
2
V+
OUTa
INa
Power Supply Terminal
Ach Output Terminal
Ach Input Terminal
3
4
INT
Ach Smoothing Capacitor Terminal
Reference Voltage Terminal
Not Connected
5
VREF
NC
6
7
NC
Not Connected
8
NC
Not Connected
9
NC
Not Connected
10
11
12
13
14
SENSE
SW
Preset Limit Level Terminal
Limiter On/Off Control Terminal
Bch Output Terminal
Bch Input Terminal
INb
OUTb
GND
Ground
– 2 –
NJM2762
Q ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER
SYMBOL
RATING
UNIT
Supply Voltage
V+
+14
V
320 [MSOP10(TVSP10)]
300 [SSOP14]
Power Dissipation
PD
mW
Maximum Input Voltage
VIMAX
Topr
Tstg
0 ~ V+ (Note1)
V
Operating Temperature Range
Storage Temperature Range
-40 ~ +85
°C
°C
-40 ~ +125
(Note1) Don’t put Input Voltage more than Power Supply Voltage.
Q ELECTRICAL CHARACTERISTICS
O POWER SUPPLY (Ta=25°C, V+=5V, SW=0 unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Operating Voltage
V+
ICC
Vref
2.7
-
5
13.0
3
V
mA
V
Operating Current
Reference Voltage
No signal
No signal
2.5
2.5
2.2
2.8
O AC CHARACTERISTICS
(Ta=25°C, V+=5V, VIN=1Vrms, f=1kHz, Rsense=8kΩ, BW=400Hz–30kHz, SW=0 unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Limit Level 1
GLIM1
130
0.7
0.9
180
1.0
1.0
230
1.3
mVrms
Vrms
Limit Level 2
Limit Off
GLIM2
V+=13V, VIN=2Vrms, Rsense=40kΩ,
GOFF
SW=2V
1.1
-90
Vrms
dBV
-100
(10)
Output Noise
VNO
RS=0Ω, A-weighting
-
(31.6) (µVrms)
Total Harmonic Distortion
Cross Talk
THD+N
CT
-
-
-
-
-
-
1
%
-70
-70
dB
dB
Ripple Rejection
RR
Vripple=100mVrms
O CONTROL CHARACTERISTICS (Ta=25°C, V+=5V, unless otherwise specified)
PARAMETER
Low Level Input Voltage
High Level Input Voltage
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
VIL
VIH
0
-
-
0.5
V+
V
V
2.0
Q CONTROL TERMINAL EXPLANATION – SW Terminal (TVSP10(MSOP10): Pin7 / SSOP14: Pin11)
MODE
STATUS
TEST CONDITION
Limiter is Active
Limiter ON
L
Limiter OFF
H
Limiter is NOT Active
– 3 –
NJM2762
Q APPLICATION CIRCUIT
MSOP10(TVSP10)
V+
10uF
1
V+
GND 10
+
1uF
1uF
470nF
470nF
OUTA
INA
2
3
4
5
9
8
7
6
OUTB
INB
470nF
INT
SW
RSENSE
10uF
VREF
SENSE
+
SSOP14
V+
10uF
1
V+
GND 14
+
1uF
1uF
470nF
470nF
OUTA
INA
13
2
3
4
5
6
7
OUTB
470nF
INB 12
11
INT
SW
RSENSE
10uF
10
VREF
NC
SENSE
+
9
8
NC
NC
NC
RSENSE Setting => See graph on page 9
– 4 –
NJM2762
TERMINAL DESCRIPTION (MSOP10)
Terminal
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
VCC
1
VCC
Supply Voltage
VCC
GND
VCC
200ꢀ
1kꢀ
2
9
OUTa
OUTb
AC Output
VCC/2
VCC/2
-
GND
VCC
1kꢀ
96kꢀ
48kꢀ
3
8
INa
INb
AC Input
GND
VCC
400ꢀ
4
INT
Smoothing Capacitor
400ꢀ
16kꢀ
GND
– 5 –
NJM2762
TERMINAL DESCRIPTION (MSOP10)
Terminal
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
VCC
50kꢀ
200kꢀ
200ꢀ
200ꢀ
5
VREF
Reference Voltage
VCC/2
200kꢀ
40kꢀ
GND
VCC
200ꢀ
200ꢀ
28uA x
RSENSE
6
SENSE
Preset Limit Level
GND
VCC
200ꢀ
150kꢀ
7
SW
Limiter ON/OFF
0V
275kꢀ
GND
– 6 –
NJM2762
TYPICAL CHARACTERISTICS
Operating current Vs Operating Voltage
Operating current Vs Temperature
No-Signal, Limiter ON, Rsense =8kꢀ
No-Signal, Limiter ON, Rsense =8kꢀ
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3
2.5
2
13V
5V
85oC
25oC
2.7V
-40oC
1.5
1
0.5
0
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14
-50
0
50
100
150
Operating Voltage, + (V)
Temperature, (oC)
Vref Vs Operating Voltage
Vref Vs Temperature
No-Signal, Limiter ON, Rsense =8kꢀ
No-Signal, Limiter ON, Rsense =8kꢀ
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
7.0
13V
6.0
5.0
4.0
3.0
2.0
1.0
0.0
-40oC, 25oC, 85oC
5V
2.7V
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14
-50
0
50
100
150
Operating Voltage, + (V)
Temperature, (oC)
Limit Response - Rsense
Limit Response - V+
V+=5V, Temp=25oC, f=1kHz, Limiter = ON
Temp=25oC, f=1kHz, Limiter = ON, Rsense = 8kꢀ
10
10
40kꢀ
20kꢀ
1
1
5V
8kꢀ
13V
0.1
0.01
0.1
2.7V
0.01
0.01
0.1
1
10
0.01
0.1
1
10
Input [Vrms]
Input [Vrms]
– 7 –
NJM2762
TYPICAL CHARACTERISTICS
Limit Response - Temperature
Freq Response - V+
V+=5V, f=1Khz, Limiter = ON, Rsense = 8kꢀ
Limiter = ON, Vin =0dBV Rsense = 8kꢀ, Limit=0.2Vrms
10
0
-2
-4
-6
85oC
1
-8
25oC
-10
-12
-14
-16
-18
-20
-40oC
2.7V, 5V
13V
0.1
0.01
0.01
0.1
1
10
10
100
1,000
10,000
100,000
Freq [Hz]
Input [Vrms]
THD - V+
THD - V+
V+=5V, f=1Khz, Limiter = ON, Rsense = 8kꢀ
V+=5V, f=1Khz, Limiter = OFF, Rsense = 8kꢀ
10
10
2.7V
2.7V
5V
1
1
5V
13V
0.1
0.1
13V
0.01
0.01
0.001
0.01
0.1
1
10
0.01
0.1
1
10
Input [Vrms]
Input [Vrms]
THD - Temperature
THD - Temperature
V+=5V, f=1Khz, Limiter = ON, Rsense = 8kꢀ
V+=5V, f=1Khz, Limiter = OFF, Rsense = 8kꢀ
10
10
1
1
-40oC
25oC
85oC
0.1
0.1
-40oC
25oC, 85oC
0.01
0.01
0.001
0.01
0.1
1
10
0.001
0.01
0.1
1
10
Input [Vrms]
Input [Vrms]
– 8 –
NJM2762
TYPICAL CHARACTERISTICS
THD Vs Freq
Vout Vs Rsense
Temp=25oC, Vin=0dBV, Limiter = ON, Rsense = 8kohm
Temp=25oC, f=1kHz, Limiter = ON,
Vin=1.5Vrms (1Vrms for 2.7V)
100
10
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
VCC=5V
VCC=13V
THD >1% (2.7V)
1
2.7V
13V
0.1
0.01
THD >10% (2.7V)
5V
VCC=2.7V
10
0
20
30
40
50
10
100
1,000
10,000
100,000
Freq [Hz]
Rsense [kꢀ]
[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.
– 9 –
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