查询NJM2705供应商
Surround Audio Processor for Mobile Applications
■■■■ GENERAL DESCRIPTION
The NJM2705 is the surround audio processor for mobile
applications.
It regenerates the 3D surround s ound with extremely narrow
space two speakers (2SP mode), headphone surround with
normal headphone (HP mode) and reverberation sound with
only one speaker (1SP mode).
It includes mode control switches for surround function and
standby function and re a liz es low consumption power desig n by
standby function.
In addition to SSOP16, an ultra small and thin package
FFP16 (Flip-Chip Fine Package) is applied.
It is suitable for cellular phone, PDA and portable game.
■■■■ FEATURES
● Operating Voltage 1.8 to 6V
● Operating Current 0.7mA typ. at Active mode
1µA max. at Standby mode
● Low Output Noise 10µVrms typ
(2SP/HP/1SP mode, VR : max.)
● Variable Surround Effect by external resistor
(Adjustable for speaker and headphone independently.)
● Standby Function
● Internal Mode Control Switch
● Bipolar Technology
● Package Outline FFP16, SSOP16
■■■■ BLOCK DIAGRAM
LIN
3D
Filter
RIN
3D
Enhancer
1SP
Surround
■■■■ PACKAGE OUTLINE
NJM2705PC1
Bypass mode
2SP mode
HP mode
1SP mode
Surround mode
NJM2705
NJM2705V
LOUT
ROUT
-1-
(Top
NJM2705
■■■■ PIN CONFIGURATION
FFP16 (Top View)
13
14
15
16
12
11 10 9
1 2 3
4
8
7
6
5
1. LIN 9. LMON
2. RIN 10. PS
3. LOUT 11. SW2
4. ROUT 12. SW1
5. NFSPR 13. STBY
6. NFHPR 14. V+
7. NFSPL 15. GND
8. NFHPL 16. VREF
SSOP16
1
2
3
5
6
View)
16
15
14
13 4
12
11
10 7
9 8
1. NFHPR 9. V+
2. NFSPR 10. STBY
3. ROUT 11. SW1
4. LOUT 12. SW2
5. RIN 13. PS
6. LIN 14. LMON
7. VREF 15. NFHPL
8. GND 16. NFSPL
- 2 -
NJM2705
■■■■ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage V+ 7 V
Power Dissipation PD
Operating Temperature Range T
Storage Temperature Range T
opr
stg
(FFP16) 400
(SSOP16) 300
-20 to +75 °C
-40 to +125 °C
mW
■■■■OPERATING VOLTAGE
PARAMETER
SYMBOL
Operating Voltage V+ - 1.8 3.0 6.0 V
TEST CONDITION MIN TYP MAX UNIT
■■■■ELECTRICAL CHARACTERISTICS (V+=3V, Ta=25°C unless otherwise specified)
TEST CONDITION
PARAMETER
Operating
Current
Reference
Voltage
SYMBOL
ICC
Vref
No Signal
L R
0 0
0 0
No Signal 0 0
INPUT
OUT
PUT
-
-
-
MODE
Active
Standby
-
SPVRHP
- 450 700
- 0.1 1.0
1.0 1.15 1.3 V
MIN TYP MAX UNIT
VR
µA
●AC CHARACTERISTICS
+
(V
=3V, Ta=25°C, VIN=-20dBV(100mVrms), f=1kHz, RL=10kΩ, unless otherwise specified)
TEST CONDITION
PARAMETER
Maximum
Input Voltage
Output Noise
SYMBOL
f=1kHz
V
IM1
THD=1%
f=100Hz
V
IM2
THD=1%
f=100Hz
V
IM3
THD=1%
f=100Hz
V
IM4
THD=1%
f=100Hz
V
IM5
THD=1%
+
=1.8V,f=1kHz
V
V
IM6
THD=1%
+
=1.8V,f=100Hz
V
V
IM7
THD=1%
+
=1.8V,f=100Hz
V
V
IM8
THD=1%
+
=1.8V,f=100Hz
V
V
IM9
THD=1%
IM10
V
V
+
=1.8V,f=100Hz
THD=1%
NO1
Rg=0Ω
V
A-Weighted
NO2
Rg=0Ω
V
A-Weighted
NO3
Rg=0Ω
V
A-Weighted
NO4
Rg=0Ω
V
A-Weighted
INPUT
OUT
L R
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 V
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 V
0 0
0 0
0 0
PUT
L
R
IN
L
R
IN
L
R
IN
0 L
L
IN
L
R
IN
L
R
IN
L
R
IN
0 L
L
IN
L
R
L
R
L
R
0 0 L
MODE
Bypass
2SP
HP
1SP
1SP
Bypass
2SP
HP
1SP
1SP
Bypass
1SP
HP
1SP
SPVRHP
VR
- -
MAX -
- MAX
MAX -
MAX -
- -
MAX -
- MAX
MAX -
MAX -
- -
MAX -
- MAX
MAX -
MIN TYP MAX UNIT
-
-
-
-
-
-10.5
(300)
-24.5
(60)
-24.5
(60)
-24.5
(60)
-23.0
(70)
-
-
-
-
-2.0
(790)
-16.0
(160)
-16.0
(160)
-16.0
(160)
-14.5
(190)
-8.5
(380)
-22.5
(75)
-22.5
(75)
-22.5
(75)
-21.0
(90)
-112
(2.5)
-100
(10)
-100
(10)
-100
(10)
-
-
-
-
-
-
-
-
-
-
-106
(5.0)
-94
(20)
-94
(20)
-94
(20)
dBV
(mVrms)
dBV
(µVrms)
-3-
NJM2705
●AC CHARACTERISTICS
+
(V
=3V, Ta=25°C, VIN=-20dBV(100mVrms), f=1kHz, RL=10kΩ, unless otherwise specified)
TEST CONDITION
PARAMETER
Total Harmonic
Distortion
BYPASS Gain G
Surround Gain
SYMBOL
THD1
THD2
THD3
THD4
VBYP
G
VSUR1
G
VSUR2
G
VSUR3
G
VSUR4
G
VSUR5
f=1kHz
f=1kHz
f=1kHz
f=1kHz
f=1kHz
f=100Hz
f=100Hz
f=100Hz
f=100Hz
f=100Hz V
INPUT
L R
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 0 V
V
IN
0 0 V
IN
OUT
PUT
L
R
IN
L
R
IN
L
R
IN
L
R
IN
L
R
IN
L
R
IN
L
R
IN
L
R
IN
L
R
IN
0 L
MODE
Bypass
2SP
HP
1SP
Bypass
2SP
2SP
HP
HP
1SP
SPVRHP
MAX -
MAX -
MAX -
MIN -
MAX -
VR
- -
- MAX
- -
- MAX
- MIN
MIN TYP MAX UNIT
- 0.02 0.05
- 0.1 0.5
%
- 0.1 0.5
- 0.1 0.5
-1.0 0.0 1.0
dB
12.5 14.5 16.5
0.5 2.5 4.5
12.5 14.5 16.5
0.5 2.5 4.5
dB
6.5 8.5 10.5
G
G
G
VSUR6
f=100Hz 0 V
VSUR7
f=100Hz V
VSUR8
f=100Hz 0 V
IN
L
IN
0 L
L
IN
1SP
1SP
1SP
MAX -
MIN -
2.0 4.0 6.0
-5.5 -3.5 -1.5
MIN - -12.0 -10.0 -8.0
●●●●CONTROL CHARACTERISTICS (V+=3V, Ta=25°C unless otherwise specified)
PARAMETER
MODE Selec t
Control Voltage
SYMBOL
V
MODE
VIN=High Level
V
=Low Level
IN
TEST CONDITION MIN TYP MAX UNIT
1.2 - V
0.0 - 0.3
■■■■SWITCH FUNCTION
SURROUND FUNCTION SW
MODE SW1 SW2 NOTES
Bypass L, OPEN L, OPEN Input Through
2SP mode L, OPEN H Surround mode for narrow space two speakers
HP mode H L, OPEN Surround mode for Headphone
1SP mode H H Surround mode for monaural speaker (Surround signal from LOUT)
STANDBY SW
MODE STBY NOTES
Standby L, open IC is non-active
Active H IC is active
+
V
- 4 -
■■■■TERMINAL DESCRIPTION
PIN No.
FFP16 SSOP16
SYMBOL FUNCTION EQUIVALENT CIRCUIT Voltage
V+
NJM2705
V+
1
2
5
6
LIN
RIN
Lch Input
Rch Input
400
400
6p
VREF
6p
1.15V
100k
V+ V+V+ V+
3
4
9
4
3
14
LOUT
ROUT
LMON
Lch Output
Rch Output
Filter terminal
20k
12k
6p
1.15V
V+ V+
5
6
7
8
2
1
16
15
NFSPR
NFHPR
NFSPL
NFHPL
Filter terminal
Filter terminal
Filter terminal
Filter terminal
10 13 PS Filter terminal
20k
400
6p
V+ V+
20k
400
6p
6p400
1.15V
1.15V
-5-
NJM2705
■■■■TERMINAL DESCRIPTION
PIN No.
FFP16 SSOP16
SYMBOL FUNCTION EQUIVALENT CIRCUIT Voltage
V+ V+V+
11
12
12
11
SW2
SW1
Mode control switch
Mode control switch
13 10 STBY Standby switch
14 9 V+ Power Supply
700
V+ V+
700
25k
75k
0V
3p
275k
0V
3p
225k
V+
15 8 GND GND
16 7 VREF Reference voltage
- 6 -
V+ V+V+
300k
400 400
300k
0V
1.15V
6p
6p
R
R
R
R
■■■■APPLICATION CIRCUIT (FFP16)
1) 2SP mode, HP mode
2) 1SP mode, HP mode
STBY
10µ
V+
1µ
Lch IN Rch O UT
0.1µ
Rch IN
0.1µ
13
STBY
V+
14
GND
15
VREF
SW1 SW2
1µ
100k
12
SW1
1
11 10
SW2
2 3
100k
1µ
PS
0.027µ
LMON
ROUTLOUTRINLIN
9
NFHPL
NFSPL
NFHP
NFSP
4
NJM2705
0.0047µ
8
MAX
HP VR
50kB
MIN
7
4.7k
6
516
0.0047µ
MAX
MIN
4.7k
0.0033µ
SP VR
50kB
0.0033µ
Lch OUT
SW1 SW2
1µ
100k
12
SW1
10µ
V+
1µ
0.1µ
0.1µ
13
STBY
V+
14
GND
15
VREF
STBY
Lch IN Rch O UT
Rch IN
SW2
1
1µ
100k
11 10
PS
2 3
0.027µ
LMON
ROUTLOUTRINLIN
9
NFHPL
NFSPL
NFHP
NFSP
4
0.0047µ
8
MAX
HP VR
50kB
MIN
7
4.7k
6
516
0.0047µ
MAX
MIN
4.7k
0.0033µ
SP VR
50kB
Lch OUT
Surround signal is outputted from LOUT terminal at 1SP mode.
-7-
X
X
X
X
NJM2705
■■■■APPLICATION CIRCUIT (SSOP16)
1) 2SP mode, HP mode
2) 1SP mode, HP mode
Rch OUT
Lch O UT
Rch IN
Lch IN
0.0033µ
0.1µ
0.1µ
50kBSP VR
4.7k
MIN
MA
50kBHP VR
4.7k
MIN
MA
HFHPR
1
NFSPR
2
ROUT
3
LOUT
4
5
LIN
6
VREF
1µ
7
GND
8 9
50kBSP VR
MA
50kBHP VR
MA
NFSPL
16
NFHPL
15
LMON
14
PS
13
SW2RIN
12
SW1
11
STBY
10
V+
4.7k
MIN
4.7k
MIN
0.0033µ0.0047µ
0.0047µ
0.027µ
SW2
100k
1µ
SW1
100k
1µ
STBY
10µ
V+
- 8 -
Rch OUT
Lch O UT
Rch IN
Lch IN
0.1µ
0.1µ
1µ
HFHPR
1
NFSPR
2
ROUT
3
LOUT
4
5
LIN
6
VREF
7
GND
8 9
NFSPL
NFHPL
LMON
PS
SW2RIN
SW1
STBY
V+
16
15
14
13
12
11
10
0.0033µ0.0047µ
0.0047µ
1
µ
0.027µ
100k
1µ
100k
1µ
10µ
V+
Surround signal is outputted from LOUT terminal at 1SP mode.
SW2
SW1
STBY
■■■■TYPICAL CHARACTERISTICS
Operating Current vs. Operating Voltage (STANDBY)
Ta=25
1
NJM2705
Operating Current vs. Temperature (STANDBY)
o
C
20
V+=3V
0.8
0.6
0.4
Operating Curre nt [µA]
0.2
0
01234567
Opera tin g Voltage [V]
Operating Current vs. Operating Voltage (ACTIVE)
o
Ta=25
C
1000
800
600
Bypass,2SP,HP,1SP mode
15
10
Opera ting Cur rent [µA]
5
0
-50 -25 0 25 50 75 100 125
Ta [oC]
Operating Current vs. Temperature (ACTIVE)
V+=3V
1000
800
600
Bypass,2SP,HP,1SP mode
400
Operating Current [µA]
200
0
01234567
Operating Vo ltage [V]
Reference Voltage vs. Operating Voltage
o
C
Ta=25
3.5
3
2.5
2
1.5
Reference Voltage [V]
1
0.5
400
Oper ating Current [µA]
200
0
-50 -25 0 25 50 75 100 125
Ta [oC]
Reference Voltage vs. Temperature
V+=3V
1.3
1.25
1.2
1.15
1.1
Reference V oltage [V]
1.05
0
01234567
Opera ting Voltage [V]
1
-50 -25 0 25 5 0 75 100 125
Ta [oC]
-9-
NJM2705
■■■■TYPICAL CHARACTERISTICS
Maximum Input Voltage vs. Operating Voltage (BYPASS)
f=1kHz, RL=10kΩ, T H D= 1 %, Ta= 2 5oC
10
Maximum Input Voltage vs. Operating Voltage (2SP)
Ta= 25oC, f=100Hz SP_VR=MAX, RL=10kΩ, TH D =1%
-5
5
0
Vin=Lch Vout=Lch
-5
Ma x im um I n pu t V ol tag e [d BV]
-10
-15
01234567
Opera ting V oltage [V]
Vin=Rch Vout=Rch
Maximum Input Voltage vs. Operating Voltage (HP)
Ta=25oC, f=100Hz , HP_VR= M A X, RL=10kΩ,THD=1%
-5
-10
-15
Vin=Lch Vout=Lch
-20
Vin=Rch Vout=Rch
-10
-15
Vin=Lch V out=Lch
-20
Max imu m In put V olta g e [dB V]
-25
-30
01234567
Oper atin g V ol tage [V]
Vin=Rch Vout=Rch
Maximum Input Voltage vs. Temperature (1SP)
Ta= 25oC, f=100Hz, SP_VR=MAX, RL=10kΩ, TH D=1 %
-5
-10
-15
Vin=Lch Vout=Lch
-20
Vin=Rch Vout=Lch
Max imum Inpu t V ol ta g e [d B V]
-25
-30
01234567
Opera ting Voltage [V]
Maximum Input Voltage vs. Temperature (BYPASS)
V+=3V, f=1kHz, RL=10kΩ
0
-1
-2
-3
Max imu m In pu t Vol tag e [d BV]
-4
-5
-50 -25 0 25 50 75 100 125
THD=1%
Vin = Lc h V out=L c h
Vin=Rch Vout=Rch
Ta [oC]
Maximum Input Voltage [dBV]
-25
-30
01234567
Oper ating Voltage [V]
Maximum Input Voltage vs. Temperature (2SP)
V+=3V, f= 100Hz, RL=10kΩ
-15
-16
-17
-18
Maximum Input Voltage [dBV]
-19
-20
-50 -25 0 25 50 75 100 125
SP_VR=MAX, T HD=1%
Vin=Lch Vout=Lch
Vin=Rch Vout=Rch
Ta [oC]
- 10 -
■■■■TYPICAL CHARACTERISTICS
Maximum Input Voltage vs. Temperrature (HP)
V+=3V, f=100Hz, RL=10kΩ
-15
HP_VR=MAX, THD=1%
Vin=Lch Vo ut=L ch
NJM2705
Maximum Input Voltage vs. Temperature (1SP)
V+=3V, f=100Hz, RL=10k Ω
-12
SP_VR=MAX, THD=1%
-16
Vin=Rch Vout=Rch
-17
-18
Maximum Input Voltage [dBV]
-19
-20
-50 -25 0 2 5 50 75 100 125
Ta [oC]
Output Noise Voltage vs. Temperature
SP_ VR=MAX, HP_VR=MAX, FILTER = A-Weighted
-90
-95
-100
-105
V+=3V , Rg= 0Ω, Vou t= L ch
2SP mode
HP mode
-13
-14
-15
Maximum In put Voltag e [dBV]
-16
-17
-50 -25 0 25 50 75 100 125
Vin=Rch Vout=Lch
Vin=Lch Vout=Lch
Ta [oC]
Output Noise Voltage vs. Temperature
SP_ VR=MAX, HP_VR=MAX, FILTER =A-Weighte d
-90
-95
-100
-105
V+=3V, Rg=0Ω, Vout=R c h
2SP mode
HP mode
-110
Output Noise Voltag e [dBV]
-115
-120
-50 -25 0 25 50 75 100 125
1SP mode
Bypass
Ta [oC]
Total Harmonic Distortion vs. Input Voltage (BYPASS)
V+=3V, Vin=Lch, f=1k Hz, Vout =Lch
10
1
0.1
THD+N [%]
0.01
RL=10kΩ, BW=10Hz-80kHz
Ta=75oC
Ta=25oC
Ta=-20oC
-110
Output Noise Vo ltag e [dBV]
-115
-120
-50 -25 0 25 50 75 100 125
Bypass
Ta [oC]
Total Harmonic Distortion vs. Input Voltage (2SP)
V+=3V, Vin =Lch, f=1 00H z, Vout=Lch
RL=10kΩ, BW=10Hz- 80kHz, SP_VR=MAX
10
1
THD+ N [%]
0.1
Ta=-20oC
Ta=25oC
Ta=75oC
0.001
-50 -40 -30 -20 -10 0
Input Voltag e [d B V]
0.01
-50 -40 -30 -20 -10 0
I np ut Vo ltage [dBV ]
-11-
NJM2705
■■■■TYPICAL CHARACTERISTICS
Total Harmonic Distortion vs. Input Voltage (HP)
V+=3V, Vin=Lch, f=100Hz, Vout=Lch
RL=10kΩ, BW=10Hz-80kHz, HP_VR=MAX
10
Total Harmonic Distortion vs. Input Voltage (1SP)
V+= 3V, Vin = Lc h, f=100H z , Vout=L c h
RL=10kΩ, BW=10Hz-80kHz, SP_VR=MAX
10
1
THD+ N [%]
0.1
0.01
-50 -40 -30 -20 -10 0
Input Voltage [dBV]
Frequency Responce (BYPASS)
V+=3 V, Vin=-20dBV Lch, Vout=Lch
1
0.5
0
Gain [d B ]
RL=10kΩ, Rg=2 5 Ω
Ta=-20,25,75oC
Ta=-20oC
Ta=25oC
Ta=75oC
1
THD + N [% ]
0.1
0.01
-50 -40 -30 -20 -10 0
Input Volt age [d BV]
Frequency Responce (2SP)
V+=3V, Vin=-20dBV Lch, Vout=Lch
20
15
10
Gain [d B]
5
RL=10kΩ, Rg=25 Ω, SP_VR=MAX
Ta=75oC
Ta=25oC
Ta=-20oC
Ta=-20oC
Ta=25oC
Ta=75oC
-0.5
-1
10 100 1000 10
Fr equency [Hz]
Frequency Responce (2SP)
V+=3V, Vin=-2 0 dBV Lch, Vou t=L ch
20
15
10
Gain [d B ]
5
0
-5
10 100 1000 10
RL=10kΩ, Rg= 25Ω, SP_VR =MIN
Fr equency [Hz]
Ta=75oC
Ta=25oC
Ta=-20oC
0
4
5
10
-5
10 100 1000 10
Frequ ency [Hz]
4
5
10
Phase vs. Freq u enc y (2SP)
V+=3V, Vin=-20dBV, Lch+Rch
90
0
-90
Phase [dB]
-180
4
5
10
-270
10 100 1000 10
RL=10kΩ, Rg=25Ω, SP_VR=MAX
Ta=-20,25,75oC
Vout=Lch
Fr equency [Hz]
Ta=-20,25,75oC
Vout=Rch
4
5
10
- 12 -
■■■■TYPICAL CHARACTERISTICS
20
15
Freque ncy Re s ponce (HP)
V+=3 V, Vin=- 20dB V Lch, Vout= Lch
RL=10kΩ, Rg=25 Ω, HP_VR=MAX
Ta=75oC
Ta=25oC
NJM2705
Frequency Responce (HP)
V+=3V, Vin=-20dBV Lch, Vout=Lch
20
15
RL=10kΩ, Rg= 2 5 Ω, HP_VR= MIN
10
Gain [dB]
5
0
-5
10 100 1000 10
Ta=-20oC
Fre quency [H z ]
Frequency Responce (1S P)
V+=3V , Vin =- 20dBV, Vout=Lc h
15
10
5
Vin=RchTa=75oC
Gain [dB]
0
-5
-10
10 100 1000 10
RL=10kΩ, Rg=2 5Ω, SP_VR=MAX
Vin=Lch
Ta=75oC
Ta=25oC
Ta=-20oC
Ta=25oC
Ta=-20oC
Fre quency [H z ]
10
Gain [dB]
5
0
4
5
10
-5
10 100 1000 10
Ta=75oC
Ta=25oC
Ta=-20oC
Frequency [Hz]
4
5
10
Frequency Responce (1SP)
V+=3V, Vin=-20dBV, Vout=Lch
10
5
0
Gain [dB]
-5
-10
4
5
10
-15
10 100 1000 10
RL=10kΩ,Rg=25Ω, VR=MIN
Ta=75oCVin=Lch
Ta=25oC
Ta=-20oC
Vin=Rch
Ta=-20oC
Ta=25oC
Ta=75oC
Frequency [Hz]
4
5
10
[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.
-13-
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