NJM2706L [NJRC]
Consumer Circuit, Bipolar, PDIP30, SDIP-30;
| 型号： | NJM2706L |
| 厂家： | 
NEW JAPAN RADIO |
| 描述： | Consumer Circuit, Bipolar, PDIP30, SDIP-30 |
| 文件： | 总15页 (文件大小：224K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NJM2706
3D Surround Audio Processor with Dynamic Bass Boost
■ GENERAL DESCRIPTION
■ PACKAGE OUTLINE
The NJM2706 is the 3D surround audio processor with
dynamic bass boost, regenerates rich sound field with only
small two speakers.
The NJM2706 performs NJRC original surround technology
realizing natural surround sound field regarded center
orientation and NJRC original dynamic bass boost technology
provides graceful bass sound with low distortion.
It is suitable for mini-component, CD radio-cassette, TV,
speaker system and others.
NJM2706VE1
NJM2706M
NJM2706L
■ FEATURES
■ Operating Voltage
■ Wide Dynamic Range
■ Low Output Noise
+4.7V to +13.0V
3.1Vrms typ.
8.9µVrms typ.
■ "eala" 3D Surround Function (Stereo only)
■ Dynamic Bass Boost Function
■ High Frequency Compensation (f=10kHz, GV=+3dB)
■ Variable Surround Effect by external resistor
■ Internal Mode Control Switch
■ Bipolar Technology
■ Package Outline
DMP24, SSOP24, SDIP30
■ BLOCK DIAGRAM (DMP24, SSOP24)
24
22
20
19
18
23
21
17
16
15
14
13
SW
L
HP
H
Vref
SW
SW
H
SW
3D FILTER
L
H:eala
L:BYPASS
SW
H:eala_Bass
H
L
LPF
HP
VC
L:BYPASS
SW
H
L
4
1
2
5
7
10
12
3
6
8
9
11
- 1 -
NJM2706
■ PIN CONFIGURATION
DMP24, SSOP24 (Top View)
1
2
24
23
22
21
20
19
18
17
1. LPF
2. MIN
3. MOUT
4. Ca
13. V+
14. VREFOUT
15. VREFIN
16. SW1
3
4
5. Cr
17. SW2
5
6. BASSFIL1
7. BASSFIL2
8. BASSVRIN
9. BASSVROUT
10. ealaVRIN
11. ealaVROUT
12. GND
18. ealaFIL
19. HFFILL
20. HFFILR
21. ROUT
22. LOUT
23. RIN
6
7
8
9
16
15
14
13
24. LIN
10
11
12
SDIP30 (Top View)
30
1
2
3
4
5
6
7
29
28
27
26
25
1. LPF
16. V+
2. MIN
3. N.C.
17. VREFOUT
18. N.C.
4. MOUT
5. Ca
6. Cr
7. BASSFIL1
8. N.C.
19. VREFIN
20. SW1
21. SW2
22. ealaFIL
23. N.C.
24
23
22
21
20
19
18
17
9. BASSFIL2
10. BASSVRIN
11. BASSVROUT
12. ealaVRIN
13. N.C.
24. HFFILL
25. HFFILR
26. ROUT
27. LOUT
28. N.C.
8
9
10
11
12
13
14. ealaVROUT
15. GND
29. RIN
30. LIN
14
15
16
- 2 -
NJM2706
■ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER
SYMBOL
V+
RATINGS
UNIT
V
Supply Voltage
15
(SDIP30) 700
(DMP24) 700
(SSOP24) 600
-40 to +85
Power Dissipation
PD
mW
Operating Temperature Range
Storage Temperature Range
Topr
Tstg
°C
°C
-40 to +125
■OPERATING VOLTAGE
PARAMETER
TEST CONDITION
MIN
4.7
TYP
12.0
MAX
13.0
UNIT
V
SYMBOL
V+
Operating Voltage
-
■ELECTRICAL CHARACTERISTICS (Ta=25°C, V+=12V unless otherwise specified)
TEST CONDITION
PARAMETER
Operating Current
Reference Voltage
MIN
TYP
MAX
UNIT
SYMBOL
ICC
INPUT
OUT
PUT
eala
VR
Bass
VR
MODE
L
R
0
0
0
0
0
0
-
-
-
Bypass
Bass
-
-
MAX
-
-
-
-
-
-
15.4
15.4
6.0
23.0
23.0
6.2
No Signal
No Signal
mA
V
Vref
5.8
■AC CHARACTERISTICS (Ta=25°C, V+=12V, VIN=-20dBV(100mVrms) unless otherwise specified)
TEST CONDITION
PARAMETER
MIN
TYP
MAX
UNIT
SYMBOL
VIM
INPUT
OUT
PUT
L
eala
VR
Bass
VR
MODE
Bypass
Bass
L
R
-
f=1kHz
VIN
-
10.0
(3.2)
12.0
(4.0)
6.0
Maximum
Input Voltage
-
-
-
-
-
-
-
THD=3%
f=100Hz
THD=3%
f=1kHz
VIN
R
VIN
VIN
*1
MAX
-
-
-
-
(2.0)
7.9
VIN
-
-
VIN
-
L
R
L
dBV
eala
MAX
MAX
MAX
-
THD=3%
f=10kHz
THD=3%
f=100Hz
THD=3%
Rg=0Ω
(2.5)
9.8
(Vrms)
VIN
-
7.8
(2.5)
3.4
eala
Bass
eala
MAX
MAX
-
VIN
-
R
L
(3.1)
5.4
VIN
-
VIN
R
L
(1.5)
(1.9)
-110
(3)
Bass
-100
(10)
Output Noise
VNO
0
0
0
0
0
0
0
0
Bypass
Bass
-
-
-
-
-
-
-
-
A-Weighted
Rg=0Ω
R
L
-98
(13)
-100
(10)
-97
(14)
MAX
-
-
-
-
A-Weighted
Rg=0Ω
R
L
dBV
(µVrms)
eala
MAX
MAX
-
A-Weighted
Rg=0Ω
R
L
-92
(25)
eala
MAX
-
A-Weighted
R
L
Bass
VIN
-
-
Total Harmonic
Distortion
THD
f=1kHz
f=100Hz
f=1kHz
f=1kHz
Bypass
Bass
0.005
0.05
0.05
0.05
0.01
VIN
VIN
VIN
-
R
L
VIN
VIN
VIIN
-
MAX
-
-
-
-
R
L
%
MAX
MAX
eala
VIN
-
R
L
VIN
-
eala
MAX
0.5
VIN
R
Bass
*1:BASSVR2OUT
- 3 -
NJM2706
■AC CHARACTERISTICS (Ta=25°C, V+=12V, VIN=-20dBV(100mVrms) unless otherwise specified)
TEST CONDITION
PARAMETER
MIN
TYP
MAX
UNIT
dB
SYMBOL
INPUT
OUT
PUT
eala
VR
Bass
VR
MODE
Bypass
Bass
Bass
eala
L
R
-
VIN
-
L
R
L
Bypass Gain
eala Gain
GVBYP
Geala
f=1kHz
-
-
-1.0
4.4
0.0
6.4
0.0
4.1
0.0
7.9
2.0
1.0
8.4
2.0
6.1
2.0
9.9
4.0
VIN
VIN
VIN
VIN
VIN
-
VIN
VIN
VIN
VIN
VIN
-
f=100Hz
f=100Hz
f=1kHz
MAX
MIN
-
-
R
L
-
-2.0
2.1
R
L
MAX
MIN
MAX
MAX
VIN
-
R
L
dB
VIN
-
f=1kHz
-
-2.0
5.9
eala
VIN
-
R
L
VIN
-
eala
Bass
eala
f=100Hz
f=10kHz
MAX
MAX
VIN
-
R
L
VIN
-
0.0
VIN
R
Bass
■CONTROL CHARACTERISTICS (Ta=25°C, V+=12V, unless otherwise specified)
PARAMETER
MODE Select
TEST CONDITION
MIN
2.0
TYP
MAX
V+
UNIT
V
SYMBOL
VMODE
-
-
VIN=High Level
VIN=Low Level
Control Voltage
0.0
0.7
■SWITCH FUNCTION
MODE
Bypass
eala
Bass
eala Bass
SW2
SW1
NOTES
L
L
H
H
L
H
L
Input Through
3D Surround mode
Bass Enhanced mode
H
3D Surround and Bass Enhanced mode
- 4 -
NJM2706
TERMINAL DESCRIPTION
No.
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
DMP24
SDIP30
SSOP24
V+
V+
1
2
3
1
LPF
Capacitor terminal for LPF
V+/2
V+/2
V+/2
150
V+
V+
V+
2
MIN
Monaural Amplifier Input
150
V+
V+
4
MOUT
Monaural Amplifier Output
V+
V+
Capacitor Terminal for
4
5
5
6
Ca
Cr
Attack Time Constant
Capacitor Terminal for
Release Time Constant
0V
100
V+
V+
V+
VCA
0V
6
7
BASSFIL1
BASS Filter Terminal 1
150
- 5 -
NJM2706
TERMINAL DESCRIPTION
No.
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
DMP24
SDIP30
SSOP24
V+
V+
7
21
22
9
26
27
BASSFIL2
ROUT
LOUT
BASS Filter Terminal 2
Rch Output
V+/2
Lch Output
V+
V+
V+
8
10
11
12
14
BASSVRIN
BASSVROUT
ealaVRIN
BASS Effect Adjust Terminal
BASS Effect Adjust Terminal
eala Effect Adjust Terminal
eala Effect Adjust Terminal
V+/2
V+/2
V+/2
V+/2
150
V+
V+
V+
9
150
V+
V+
10
150
V+
V+
11
ealaVROUT
- 6 -
NJM2706
TERMINAL DESCRIPTION
No.
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
DMP24
SDIP30
SSOP24
12
13
14
15
15
GND
GND Terminal
0V
16
17
19
V+
Power Supply Terminal
Reference Voltage Output
Reference Voltage Input
V+
V+
V+
V+
V+/2
V+/2
0V
VREFOUT
400
V+
V+
V+
VREFIN
400
V+
V+
V+
16
17
20
21
SW1
SW2
Mode Switch 1
Mode Switch 2
150
- 7 -
NJM2706
TERMINAL DESCRIPTION
No.
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
DMP24
SDIP30
SSOP24
V+
V+
18
22
ealaFIL
eala Filter Terminal
V+/2
10k
V+
V+
19
20
24
25
HFFILL
HFFILR
High Frequency Filter for Lch
High Frequency Filter for Rch
V+/2
400
V+
V+
V+
23
24
29
30
RIN
LIN
Rch Input
Lch Input
V+/2
150
VREF
- 8 -
NJM2706
■APPLICATION CIRCUIT
(DMP24, SSOP24)
23
22
21
20
19
18
17
16
15
14
13
24
1
2
3
4
5
7
8
9
20KB
10
12
6
11
20KB
ealaVR
BassVR
(SDIP30)
29
28
27
26
25
24
23
22
21
20
19
18
17
16
30
1
2
3
4
5
6
8
9
10
11
20KB
12
13
20KB
15
7
14
ealaVR
BassVR
- 9 -
NJM2706
■APPLICATION NOTE
1. Fine-Tuning the ealaBASS
The NJM2706 has quite sophisticated NJRC’s original dynamic bass-boost technology. Both of the level and the
frequency for bass-boost moves automatically corresponding to the input signal level. This dynamic filtering action
prevents the signals over boosted, and provides less distortion and wide dynamic range bass-boost processing.
In addition, if you want to fine-tune the bass-boost effect for your system, you can modify the bass-boost effect by
changing the external parts value as described below.
1-1. Modify the Boost Center Frequency
This plot shows the frequency response for NJM2706 ealaBASS.
Frequency Characteristics (eala Bass)
V+=12V Vin=-20dBVLch Vout=Lch RL=4.7k Ω
Rg=25Ω
10
C4=0.1µF
C4=0.15µF
5
C4=0.18µF
0
-5
10
100
1000
104
105
Frequency [Hz]
The Boost Center Frequency can be adjusted by changing the value for the external capacitor, C4.
If your speaker system has more than 100Hz of f0 (= Lower Frequency Response Range), or, if you would like to
get more powerful bass-boost effect than the typical settings shown on the page 9, increasing the Boost Center
Frequency higher could be a good idea. We strongly recommend you to determine the actual capacitance value by
testing and examinations on your actual application.
1-2. Modification for the LPF Cut-off Frequency fCL
This picture shows the equivalent circuit for NJM2706’s LPF.
R1 20k
20k
Lch
2pin
3pin
LPF
20k
Rch
16k
1pin
MONO Amp.
C1
0.1µ
* The pin numbers apply in DMP24 and SSOP24's case.
The LPF Cut-off Frequency fCL is given by the following equation:
1
1
fCL=
=
2πCR
2πC1×16k
Set the fCL as same as the Boost Center Frequency, which is determined as above (The Boost Center Frequency =
the frequency of which the gain is +3dB). In the typical application circuit shown on the page 9, the LPF Cut-off
Frequency fCL is set to 100Hz.
- 10 -
NJM2706
1-3. Adjusting the Summing Level for ealaBASS effect to L/R Output Signal
Changing the resistance value connected between the terminal 8 and 9 can modify the Summing Level for the
ealaBASS effect to the L/R Output Signal.
2. Adjusting the High Frequency Compensation Filter
The NJM2706 has High Frequency Compensation Filter, which can produce well balance between boosted–bass
frequency range and treble frequency range. This picture shows the equivalent circuit for the High Frequency
Compensation Filter.
15k
HFFIL
R6
20pin
30k
C11
560p
* The pin numbers apply in DMP24 and SSOP24's case.
The Cut-off Frequency fCH and the Voltage Gain GVH are defined as below:
1
1
R6+15k
R6
GVH= 20log
fCH=
=
2πCR
2π×C11×R6
In the typical application circuit shown on the page 9, the High Frequency Compensation Filter Cut-off Frequency
CH is set to 10kHz and Voltage Gain GVH is set to 3.5dB.
f
- 11 -
NJM2706
■TYPICAL CHARACTERISTICS
Supply Current vs. Supply Voltage
Supply Current vs. Temperature
V+=1-13V, Ta=25oC
V+=12V
16
15
14
13
12
11
10
20
15
10
5
BASS
Bypass
eala BASS
BASS
eala
Bypass
0
-50
0
50
100
150
0
5
10
15
20
Temperature [oC]
Supply Voltage [V]
Maximum Input Voltage vs. Supply Voltage (BASS)
Maximum Input Voltage vs. Supply Voltage (Bypass)
Vin=Lch+Rch, Vout=BASSVROUT, f=100Hz, RL=4.7k Ω,
Vin=Lch, Vout=Lch, f=1kHz, RL=4.7k Ω,
Rg=25Ω, Ta=25oC
Rg=25Ω, Ta=25oC
20
20
15
10
5
15
10
5
0
0
-5
-5
-10
-10
0
4
8
12
16
0
4
8
12
16
Supply Voltage [V]
Supply Voltagte [V]
Maximum Input Voltage vs. Supply Voltage (eala)
Maximum Input Voltage (eala BASS)
Vin=Lch, Vout=Lch, f=10kHz, RL=4.7k Ω,
Vin=Lch, Vout=Lch, f=1kHz, RL=4.7k Ω,
Rg=25Ω, Ta=25oC
Rg=25Ω, Ta=25oC
15
15
10
5
10
5
0
0
-5
-5
-10
-15
-10
-15
0
4
8
12
16
0
4
8
12
16
Supply Voltage [V]
Supply Voltage [V]
- 12 -
NJM2706
■ TYPICAL CHARACTERISTICS
Maximum Input Voltage vs. Supply Voltage (eala BASS)
Vin=Lch+Rch, Vout=Lch, f=100Hz, RL=4.7k Ω,
Output Noise vs. Temperature
Rg=25Ω Ta=25oC
V+=12V, Vin=GND, Vout=Lch
15
-90
-95
eala BASS
BASS
10
5
-100
-105
-110
-115
-120
eala
0
-5
Bypass
-10
-15
-50
0
50
100
150
0
4
8
12
16
Temperature [oC]
Supply Voltage [V]
THD+N vs. Input Voltage (Bypass)
V+=12V, Vin=Lch, Vout=Lch, f=1kHz, RL=4.7k Ω,
Rg=25Ω, BW=10-80KHz
THD+N vs. Input Voltage (Bypass)
V+=12V, Vin=Lch, Vout=Lch, f=100Hz, RL=4.7k Ω,
Rg=25Ω, BW=10-80kHz
10
1
10
1
Ta=85oC
Ta=85oC
Ta=25oC
Ta=-40oC
0.1
0.1
Ta=25oC
Ta=-40oC
0.01
0.001
0.0001
0.01
0.001
0.0001
-50
-40
-30
-20
-10
0
10
20
-50
-40
-30
-20
-10
0
10
20
Input Voltage [dBV]
Input Voltage [dBV]
THD+N vs. Input Voltage (eala)
V+=12V, Vin=Lch, Vout=Lch, f=1kHz, RL=4.7k Ω,
Rg=25Ω, BW=10-80kHz
THD+N vs. Input Voltage (Bypass)
V+=12V, Vin=Lch, Vout=Lch, f=10kHz, RL=4.7k Ω,
Rg=25Ω, BW=10-80kHz
10
10
1
1
Ta=-40oC
Ta=85oC
Ta=25oC
Ta=85oC
0.1
Ta=25oC
Ta=-40oC
0.1
0.01
0.001
0.01
-50
-40
-30
-20
-10
0
10
20
-50
-40
-30
-20
-10
0
10
20
Input Voltage [dBV]
Input Voltage [dBV]
- 13 -
NJM2706
■ TYPICAL CHARACTERISTICS
THD+N vs. Input Voltage (eala BASS)
V+=12V, Vin=Lch, Vout=Lch, f=100Hz, RL=4.7k Ω,
Rg=25Ω, BW=10-80kHz
THD+N vs. Input Voltage (eala BASS)
V+=12V, Vin=Lch, Vout=Lch, f=1kHz, RL=4.7k Ω,
Rg=25Ω, BW=10-80kHz
10
10
1
1
Ta=85oC
Ta=-40oC
Ta=25oC
Ta=85oC
Ta=25oC
Ta=-40oC
0.1
0.1
0.01
0.01
-50
-40
-30
-20
-10
0
10
20
-50
10
10
-40
-30
-20
-10
0
10
20
105
105
Input Voltage [dBV]
Input Voltage [dBV]
THD+N vs. Input Voltage (eala BASS)
V+=12V, Vin=Lch, Vout=Lch, f=20kHz, RL=4.7k Ω,
Rg=25Ω, BW=10-80kHz
Gain vs. Frequency (Bypass)
V+=12V, Vin=-20dBV Lch, Vout=Lch, RL=4.7k Ω,
Rg=25Ω
10
3
2
Ta=85oC
Ta=25oC
Ta=-40oC
1
1
Ta=-40oC
Ta=25oC
Ta=85oC
0
0.1
-1
-2
-3
0.01
104
-50
-40
-30
-20
-10
0
10
20
100
1000
Input Voltage [dBV]
Frequency [Hz]
Gain vs. Frequency (BASS)
V+=12V, Vin=-20dBV Lch+Rch, Vout=Lch, RL=4.7k Ω,
Rg=25Ω
Gain vs. Frequency (eala)
V+=12V, Vin=-20dBV Lch, Vout=Lch, RL=4.7k Ω,
Rg=25Ω
12
10
8
12
10
8
Ta=85oC
Ta=25oC
Ta=85oC
Ta=25oC
Ta=-40oC
6
6
Ta=-40oC
4
4
2
2
0
0
-2
-2
104
10
100
1000
104
105
100
1000
Frequency [Hz]
Frequency [Hz]
- 14 -
NJM2706
■ TYPICAL CHARACTERISTICS
Gain vs. Frequency (eala BASS)
V+=12V, Vin=-20dBV Lch, Vout=Lch, RL=4.7k Ω,
Rg=25Ω
Gain vs. Frequency (eala BASS)
20
15
10
5
12
10
8
Ta=85oC
Ta=25oC
Ta=-40oC
-40dBV INPUT
-30dBV INPUT
6
-20dBV INPUT
-10dBV INPUT
4
0dBV INPUT
2
0
0
-5
-2
104
105
10
100
1000
104
10
100
1000
Frequency [Hz]
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.
- 15 -
相关型号：
©2020 ICPDF网 联系我们和版权申明