NJM2704 [NJRC]
3D SURROUND AUDIO PROCESSOR FOR HEADPHONE; 3D环绕声音频处理器耳机
| 型号： | NJM2704 |
| 厂家： | 
NEW JAPAN RADIO |
| 描述： | 3D SURROUND AUDIO PROCESSOR FOR HEADPHONE |
| 文件： | 总11页 (文件大小：180K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NJM2704
3D SURROUND AUDIO PROCESSOR FOR HEADPHONE
■ GENERAL DESCRIPTION
■ PACKAGE OUTLINE
The NJM2704 is a high quality 3D surround audio processor
designed for headphone applications.
It includes mode control switches for surround function and
standby function and realizes low consumption power design by
standby function.
In addition to SSOP14, ultra small and thin package FFP12
(Flip-chip Fine Package) is applied. It is suitable for portable
telephone, PDA and any portable audio applications.
NJM2704V
NJM2704PB1
■ FEATURES
■ Operating Voltage
1.8 to 6V
■ Low Operating Current
0.45mA typ. (at Active mode)
0.1µA typ. (at Standby mode)
■ Low Output Noise
10µV typ. (at Surround mode, VR: max.)
■ Variable Surround Effect by external resistor
■ Internal Mode Control Switch
■ Bipolar Technology
■ Package Outline
SSOP14, FFP12
■ PIN CONFIGURATION
9
8
7
1
2
3
4
5
6
7
14
13
12
11
10
9
1. STANDBY SW
2. LIN
3. RIN
4. MODE SW
5. VREF
6. GND
7. NC
8. DNC
9. V+
10. NFR
11. NFL
12. ROUT
13. LOUT
14. NC
1. VREF
2. MODE SW
3. RIN
10
11
12
6
5
4
4. LIN
5. STANDBY SW
6. LOUT
7. ROUT
8. NFL
9. NFR
10. V+
1
2
3
11. DNC
12. GND
(FFP12)
8
(SSOP14)
- 1 -
NJM2704
■ BLOCK DIAGRAM
NFR
9
NFL
8
ROUT
7
3D
FILTER
STEREO
BYPASS
V+ 10
LOUT
6
5
4
3D
FILTER
STEREO
BYPASS
BIAS
DNC 11
STANDBY SW
GND
12
LIN
1
2
3
VREF
MODE SW
RIN
- 2 -
NJM2704
■ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER
Supply Voltage
SYMBOL
V+
RATINGS
7
UNIT
V
Power Dissipation
PD
320
mW
°C
Operating Temperature Range
Storage Temperature Range
Topr
-20 to +75
-40 to +125
Tstg
°C
■OPERATING VOLTAGE
PARAMETER SYMBOL
TEST CONDITION
MIN.
1.8
TYP. MAX.
3.0 6.0
UNIT
V
Operating
V+
-
Voltage
■ELECTRICAL CHARACTERISTICS (V+=3V, Ta=25°C unless otherwise specified)
TEST CONDITION
PARAMETER SYMBOL
MIN.
TYP. MAX.
UNIT
INPUT
OUTPUT
MODE
VR
L
R
0
Operating
Current
ICC
0
0
-
-
Active
-
-
-
-
450
0.1
700
1.0
No Signal
No Signal
µA
0
0
Standby
Reference
Voltage
Vref
0
-
-
-
1.0
1.15
1.3
V
■AC CHARACTERISTICS
(V+=3V, Ta=25°C, VIN=-20dBV(100mVrms), f=1kHz, RL=10kΩ, unless otherwise specified)
TEST CONDITION
PARAMETER
SYMBOL
VIM
MIN.
TYP.
MAX.
UNIT
INPUT
OUTPUT
MODE
Bypass
VR
-
L
R
Maximum
Input Voltage
-2.0
(790)
f=1kHz
T.H.D.=1%
VIN
0
0
VIN
L
R
-
-
-
-
-
-
-16.0
(160)
f=100Hz
T.H.D.=1%
VIN
0
0
VIN
L
R
MAX
Surround
Bypass
dBV
(mVrms)
V+=1.8V
f=1kHz
T.H.D.=1%
V+=1.8V
f=100Hz
T.H.D.=1%
-10.5
(300)
-8.5
(380)
VIN
0
0
VIN
L
R
-
-24.5
(60)
-22.5
(75)
VIN
0
0
VIN
L
R
MAX
-
Surround
Bypass
Output Noise
VNO
Rg=0
Ω
L
R
-112
(2.5)
-106
(5.0)
0
0
0
0
-
-
-
-
A-Weighted
dBV
(µVrms)
Rg=0
Ω
L
R
-100
(10)
-94
(20)
MAX
-
Surround
Bypass
A-Weighted
Total
Harmonic
Distortion
T.H.D
VIN
0
0
VIN
L
R
0.02
0.1
0.05
0.5
f=1kHz
%
VIN
0
0
VIN
L
R
MAX
f=1kHz
Surround
- 3 -
NJM2704
■AC CHARACTERISTICS
(V+=3V, Ta=25°C, VIN=-20dBV(100mVrms), f=1kHz, RL=10kΩ, unless otherwise specified)
TEST CONDITION
PARAMETER SYMBOL
MIN.
TYP.
MAX.
UNIT
dB
INPUT
OUTPUT
MODE
Bypass
VR
-
L
R
Bypass Gain
GVBYP
VIN
0
0
VIN
L
R
f=1kHz
-1.0
12.5
10.5
0.5
0.0
14.5
12.5
2.5
1.0
16.5
14.5
4.5
Surround Gain
GVSUR
VIN
0
0
VIN
L
R
f=100Hz
f=100Hz
f=100Hz
MAX
MAX
MIN
Surround
Surround
Surround
0
VIN
VIN
0
L
R
dB
VIN
0
0
VIN
L
R
■CONTROL CHARACTERISTICS (V+=3V, Ta=25°C unless otherwise specified)
TEST CONDITION
PARAMETER SYMBOL
INPUT
MIN.
TYP.
MAX.
UNIT
V
OUTPUT
MODE
VR
L
R
V =
High Level
IN
1.2
0.0
-
-
V+
Mode Select
Control
-
-
-
-
-
-
-
-
VMODE
V =
IN
Voltage
0.3
-
-
Low Level
■SWITCH FUNCTION
MODE SW
MODE
Bypass
Terminal Status
NOTES
L, open
H
Input Through
Surround
Surround Mode (Stereo Input)
STANDBY SW
MODE
Terminal Status
NOTES
IC is non-active
Standby
L, open
H
Active
IC is active
- 4 -
NJM2704
■TERMINAL DESCRIPTION
PIN No.
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
Voltage
FFP12
SSOP14
V+
V+
V+
1
5
VREF
Reference voltage
1.15V
V+
V+
V+
2
4
MODE SW Mode control switch
0V
700
V+
V+
V+
3
4
3
2
RIN
LIN
Rch Input
Lch Input
1.15V
700
VREF
V+
V+
STANDBY
SW
5
1
Standby switch
0V
700
75k
- 5 -
NJM2704
PIN No.
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
Voltage
FFP12
SSOP14
V+
V+
V+
V+
6
7
13
12
LOUT
ROUT
Lch Output
Rch Output
1.15V
12k
V+
V+
8
9
11
10
NFL
NFR
Filter terminal
Filter terminal
1.15V
400
10
9
V+
NC
Power Supply
No Connect
V+
7
14
-
-
-
11
8
DNC
Do Not Connect
- 6 -
NJM2704
■APPLICATION CIRCUIT
FFP12
MIN
MAX
VR
50kB
Rch OUT
0.0047µ
0.0047µ
9
8
7
10µ
NFR
NFL
ROUT
10 V+
LOUT
6
5
4
Lch OUT
V+
11 DNC
STANDBY
SW
STANDBY SW
12 GND
LIN
Lch IN
0.1µ
0.1µ
VREF MODE SW RIN
1
2
3
Rch IN
MODE SW
SSOP14
STANDBY SW
1
2
3
STANDBY
SW
NC
14
0.1µ
0.1µ
Lch IN
Rch IN
LIN
LOUT 13
ROUT 12
Lch OUT
RIN
Rch OUT
4.7k
100k
1µ
MODE SW
4
5
6
7
MODE
SW
NFL
11
MAX
1µ
MIN
VREF
GND
NC
NFR 10
VR
50kB
10µ
V+
9
8
V+
DNC
- 7 -
NJM2704
■TYPICAL CHARACTERISTICS
Supply Current vs. Supply Voltage
Ta=25degrees
Supply Current vs. Ambient Temperature
V+=3V
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
BYPASS
Surround
Surround
BYPASS
0
1
2
3
4
5
6
7
-50
-25
0
25
50
75
100
125
Supply Voltage [V]
Ambient Temperature [degrees]
Reference Voltage vs. Supply Voltage
Reference Voltage vs. Ambient Temperature
V+=3V
Ta=25degrees
3.5
3
1.3
1.25
1.2
2.5
2
1.15
1.1
1.5
1
1.05
1
0.5
0
0
1
2
3
4
5
6
7
-50
-25
0
25
50
75
100
125
Supply Voltage [V]
Ambient Temperature [degrees]
Maximum Input Voltage vs. Supply Voltage (BYPASS)
Maximum Input Voltage vs. Supply Voltage (Surround)
Vin=Lch f=1kHz Vout=Lch RL=10kohm
Vin=Lch f=100Hz Vout=Lch RL=10kohm VR=MAX
THD=1% Ta=25degrees
10
THD=1% Ta=25degrees
-5
5
0
-10
-15
-20
-25
-30
-5
-10
-15
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Supply Voltage [V]
Supply Voltage [V]
- 8 -
NJM2704
■TYPICAL CHARACTERISTICS
Maximum Input Voltage vs. Ambient Temperature (BYPASS)
Maximum Input Voltage vs. Ambient Temperature (Surround)
V+=3V Vin=Lch f=1kHz Vout=Lch RL=10kohm
THD=1%
V+=3V Vin=Lch f=100Hz Vout=Lch RL=10kohm
VR=MAX THD=1%
0
-1
-2
-3
-4
-5
-15
-16
-17
-18
-19
-20
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Ambient Temperature [degrees]
Ambient Temperature [degrees]
Maximum Input Voltage vs. Ambient Temperature (BYPASS)
Maximum Input Voltage vs. Ambient Temperature (Surround)
V+=1.8V Vin=Lch f=1kHz Vout=Lch RL=10kohm
V+=1.8V Vin=Lch f=100Hz Vout=Lch RL=10kohm
THD=1%
VR=MAX THD=1%
-20
-5
-6
-7
-21
-22
-23
-24
-25
-8
-9
-10
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Ambient Temperature [degrees]
Ambient Temperature [degrees]
Output Noise Voltage vs. Ambient Temperature
Output Noise Voltage vs. Ambient Temperature
V+=3V Rg=0ohm Vout=Lch VR=MAX
FILTER=A-Weighted
V+=3V Rg=0ohm Vout=Rch VR=MAX
FILTER=A-Weighted
-90
-90
-95
-100
-105
-110
-115
-120
-95
-100
-105
-110
-115
-120
Surround
BYPASS
Surround
BYPASS
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
Ambient Temperature [degrees]
Ambient Temperature [degrees]
- 9 -
NJM2704
■TYPICAL CHARACTERISTICS
Total Harmonic Distortion vs. Input Voltage (BYPASS)
Total Harmonic Distortion vs. Input Voltage (Surround)
V+=3V Vin=Lch f=1kHz Vout=Lch
RL=10kohm BW=10Hz to 80kHz
V+=3V Vin=Lch f=100Hz Vout=Lch
RL=10kohm BW=10Hz to 80kHz VR=MAX
10
10
1
1
Ta=75deg.
Ta=25deg.
Ta=-20deg.
0.1
Ta=75deg.
Ta=25deg.
Ta=-20deg.
0.1
0.01
0.001
0.01
-50
-40
-30
-20
-10
0
-50
-40
-30
-20
-10
0
10
Input Voltage [dBV]
Input Voltage [dBV]
Voltage Gain vs. Frequency (BYPASS)
Voltage Gain vs. Frequency (Surround)
V+=3V Vin=-20dBV Lch Vout=Lch
RL=10kohm Rg=25ohm
V+=3V Vin=-20dBV Lch Vout=Lch
RL=10kohm Rg=25ohm VR=MAX
1
0.5
0
20
Ta=75deg.
Ta=25deg.
Ta=-20deg.
15
10
5
Ta=-20deg.
Ta=25deg.
Ta=75deg.
-0.5
-1
0
-5
10
100
1000
104
105
10
100
1000
104
105
Frequency [Hz]
Frequency [Hz]
Voltage Gain vs. Frequency (Surround)
Voltage Gain vs. Frequency (Surround)
V+=3V Vin=-20dBV Rch Vout=Lch
RL=10kohm Rg=25ohm VR=MAX
V+=3V Vin=-20dBV Lch Vout=Lch
RL=10kohm Rg=25ohm VR=MIN
15
10
5
20
15
10
5
Ta=75deg.
Ta=25deg.
Ta=-20deg.
Ta=75deg.
Ta=25deg.
Ta=-20deg.
0
-5
0
-10
-5
10
100
1000
104
105
10
100
1000
104
105
Frequency [Hz]
Frequency [Hz]
- 10 -
NJM2704
■TYPICAL CHARACTERISTICS
Voltage Gain vs. SW Terminal Input Voltage
Output DC Offset Voltage vs. Ambient Temperature
V+=3V Vin=-20dBV Lch f=100Hz Vout=Lch VR=MAX
BYPASS to Surround
V+=3V
BYPASS to Surround
20
15
10
5
10
5
Lch
Rch
0
Ta=75deg.
Ta=25deg.
Ta=-20deg.
-5
-10
0
-5
0
0.5
1
1.5
2
-50
-25
0
25
50
75
100
125
SW Terminal Input Voltage [V]
Ambient Temperature [degrees]
[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.
- 11 -
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