NJM2704
3D SURROUND AUDIO PROCESSOR FOR HEADPHONE
s
GENERAL DESCRIPTION
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.
s
PACKAGE OUTLINE
NJM2704V
NJM2704PB1
s
FEATURES
q
Operating Voltage
q
Low Operating Current
1.8 to 6V
0.45mA typ. (at Active mode)
0.1µA typ. (at Standby mode)
q
Low Output Noise
10µV typ. (at Surround mode, VR: max.)
q
Variable Surround Effect by external resistor
q
Internal Mode Control Switch
q
Bipolar Technology
q
Package Outline
SSOP14, FFP12
s
PIN CONFIGURATION
9
8
7
10
11
12
6
5
4
1
2
3
(FFP12)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
VREF
MODE SW
RIN
LIN
STANDBY SW
LOUT
ROUT
NFL
NFR
V+
DNC
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
STANDBY SW
LIN
RIN
MODE SW
VREF
GND
NC
DNC
V+
NFR
NFL
ROUT
LOUT
NC
(SSOP14)
-1-
NJM2704
s
ABSOLUTE MAXIMUM RATING
(Ta=25°C)
PARAMETER
Supply Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
s
OPERATING VOLTAGE
PARAMETER
Operating
Voltage
SYMBOL
V+
TEST CONDITION
MIN.
1.8
TYP.
3.0
MAX.
6.0
UNIT
V
SYMBOL
V
+
RATINGS
7
320
-20 to +75
-40 to +125
UNIT
V
mW
°C
°C
P
D
T
opr
T
stg
-
s
ELECTRICAL CHARACTERISTICS
(V+=3V, Ta=25°C unless otherwise specified)
TEST CONDITION
PARAMETER
Operating
Current
Reference
Voltage
SYMBOL
I
CC
No Signal
0
Vref
No Signal
0
0
0
-
-
Standby
-
-
-
-
1.0
0.1
1.15
1.0
1.3
V
INPUT
L
0
R
0
MIN.
OUTPUT
-
MODE
Active
VR
-
-
450
700
TYP.
MAX.
UNIT
µA
qAC
CHARACTERISTICS
(V+=3V, Ta=25°C, V
IN
=-20dBV(100mVrms), f=1kHz, RL=10kΩ, unless otherwise specified)
TEST CONDITION
PARAMETER
Maximum
Input Voltage
SYMBOL
V
IM
INPUT
L
f=1kHz
T.H.D.=1%
f=100Hz
T.H.D.=1%
V+=1.8V
f=1kHz
T.H.D.=1%
V+=1.8V
f=100Hz
T.H.D.=1%
Output Noise
V
NO
Rg=0
Ω
A-Weighted
Rg=0
Ω
A-Weighted
Total
Harmonic
Distortion
T.H.D
f=1kHz
V
IN
0
V
IN
0
V
IN
0
V
IN
0
0
R
0
V
IN
0
V
IN
0
V
IN
0
V
IN
0
MIN.
OUTPUT
L
R
L
R
L
R
L
R
L
R
L
R
L
R
L
R
MODE
VR
-2.0
(790)
-16.0
(160)
-8.5
(380)
-22.5
(75)
-112
(2.5)
-100
(10)
0.02
TYP.
MAX.
UNIT
Bypass
-
-
-
Surround
MAX
-
-10.5
(300)
-24.5
(60)
-
-
dBV
(mVrms)
-
Bypass
-
Surround
MAX
-
-106
(5.0)
-94
(20)
0.05
%
Bypass
-
dBV
(µVrms)
0
V
IN
0
V
IN
0
0
0
V
IN
0
V
IN
Surround
MAX
-
Bypass
-
-
f=1kHz
Surround
MAX
-
0.1
0.5
-3-
NJM2704
qAC
CHARACTERISTICS
(V+=3V, Ta=25°C, V
IN
=-20dBV(100mVrms), f=1kHz, RL=10kΩ, unless otherwise specified)
TEST CONDITION
PARAMETER
Bypass Gain
SYMBOL
G
VBYP
f=1kHz
Surround Gain
G
VSUR
f=100Hz
INPUT
L
V
IN
0
V
IN
0
0
V
IN
V
IN
0
R
0
V
IN
0
V
IN
V
IN
0
0
V
IN
MIN.
OUTPUT
L
R
L
R
L
R
L
R
MODE
VR
TYP.
MAX.
UNIT
Bypass
-
-1.0
0.0
1.0
dB
Surround
MAX
12.5
14.5
16.5
f=100Hz
Surround
MAX
10.5
12.5
14.5
dB
f=100Hz
Surround
MIN
0.5
2.5
4.5
q
CONTROL CHARACTERISTICS
(V+=3V, Ta=25°C unless otherwise specified)
TEST CONDITION
PARAMETER
SYMBOL
V
IN
=
High Level
V
IN
=
Low Level
INPUT
L
Mode Select
Control
Voltage
-
-
R
-
-
MIN.
OUTPUT
-
-
MODE
-
-
VR
-
-
1.2
0.0
-
-
V+
V
0.3
TYP.
MAX.
UNIT
V
MODE
s
SWITCH FUNCTION
MODE SW
MODE
Bypass
Surround
Terminal Status
L, open
H
NOTES
Input Through
Surround Mode (Stereo Input)
STANDBY SW
MODE
Standby
Active
Terminal Status
L, open
H
NOTES
IC is non-active
IC is active
-4-
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