NJW1191
1
4-channel Electronic Volume with Input Selector
!
GENERAL DESCRIPTION
!
PACKAGE OUTLINE
NJW1191
is 4-channel Electronic Volume with input
selector. It includes main volume, balance and fader trim, 4
inputs selector, loudness and tone control.
NJW1191
performs low noise and low distortion
characteristics with resistance ladder type electrical volume.
All of internal status and variables are controlled by I
2
C BUS
interface.
!
FEATURES
Operating Voltage
7.5 to 13V
I
2
C BUS Interface
Low Output Noise
-103dBVtyp
Low Distortion
0.01%typ
4ch Input Selector
Loudness
Tone Control
Bass / Treble
Main Volume
Balance & Fader
Bi-CMOS Technology
Package Outline
SSOP32
!
BLOCK DIAGRAM
NJW1191V
Tone
Tone
I
2
C
In
te
r
f
a
c
e
Bia
s
0dB,+6dB
,+12dB,+18dB
0dB,+6dB
,+12dB,+18dB
NJW1191
2
!
PIN FUNCTION
No. SYMBOL
FUNCTION
No.
SYMBOL FUNCTION
1
GND Ground
17
SDA I
2
C Data Input / Acknowledge Output
2
VREF Reference
Voltage
18
RL_OUT
Lch Rear Vol. Output
3
IN1R
Rch Input 1
19
FL_OUT
Lch Front Vol. Output
4
IN2R
Rch Input 2
20
VOL2IN_L Lch
2
nd
Vol. Input
5
IN3R
Rch Input 3
21
TONEOUT_L
Lch
Tone Output
6
IN4R
Rch Input 4
22
DCCL
Lch Tone Bass DC cut Capacitor
7
TAP1R
Rch Loudness High Freq. Time Constant
23
TLCL
Lch Tone Bass Time Constant
8
TAP2R
Rch Loudness Low Freq. Time Constant
24
THCL Lch
Tone
Treble
Time
Constant
9
THCR
Rch Tone Treble Time Constant
25
TAP2L
Lch Loudness Low Freq. Time Constant
10
TLCR
Rch Tone Bass Time Constant
26
TAP1L
Lch Loudness High Freq. Time Constant
11
DCCR
Rch Tone Bass DC cut Capacitor
27
IN4L
Lch Input 4
12
TONEOUT_R Rch
Tone Output
28
IN3L
Lch Input 3
13
VOL2IN_R Rch
2
nd
Vol. Input
29
IN2L
Lch Input 2
14
FR_OUT
Rch Front Vol. Output
30
IN1L
Lch Input 1
15
RR_OUT
Rch Rear Vol. Output
31
N.C No
Connect
16
SCL I
2
C Clock Input
32
V+ Power
Supply
!
ABSOLUTE MAXIMUM RATING (Ta=25C)
PARAMETER SYMBOL
RATING
UNIT
Supply Voltage
V
+
15
V
Power Dissipation
P
D
800
NOTE: EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting
mW
Operating Temperature Range
Topr
-40 to +85
C
Storage Temperature Range
Tstg
-40 to +125
C
1
16
17
32
NJW1191
3
!
!
!
!
ELECTRICAL CHARACTERISTICS
( Ta=25C, V+=9V, R
g
=600
, R
L
=47k
, Vin=1.5Vrms,f=1kHz, all controls flat(Gv=0dB) unless otherwise specified)
PARAMETER SYMBOL
Condition MIN.
TYP.
MAX.
UNIT
Operating Voltage
V
+
7.5 9.0 13.0 V
Supply Current
I
CC
No
Signal
- 13 18 mA
Reference Voltage
V
REF
No
Signal
4.0 4.5 5.0 V
Maximum Input Voltage
V
IM
VOL1=-20dB
THD=1%
2.0 2.4 - Vrms
Maximum
Output Voltage 1
V
OM1
THD=1%
2.0 2.4
-
Vrms
Maximum
Output Voltage 2
V
OM2
THD=1%,
f=50kHz
1.5 2.4
-
Vrms
Voltage Gain 1
G
V1
VOL1=0dB, AMP GAIN=+18dB
Vin=0.1Vrms
+16 +18 +20 dB
Voltage Gain 2
G
V2
-1
0
1
dB
Voltage Gain 3
G
V3
VOL1=-68dB
-71 -68 -65 dB
Voltage Gain 4
G
V4
VOL2FL,FR,BL,BR=-42dB
-45 -42 -39 dB
Mute Level
Mute
VOL2FL,FR,BL,BR=Mute
Filter : 400Hz to 30kHz
- -100 -90 dB
Channel Balance
G
CB
-1 0 1 dB
Total Harmonic Distortion
THD
BW : 400Hz to 30kHz
-
0.01
0.05
%
Output Noise Voltage 1
V
NO1
Rg=0
, Filter : A-weighted
-
-
-103
(7)
-90
(32)
dBV
(
Vrms)
Output Noise Voltage 2
V
NO2
VOL2FL,FR,BL,BR=Mute
Rg=0
, Filter : A-weighted
-
-
-108
(4)
-95
(17.8)
dBV
(
Vrms)
Cross Talk
CT
Selected Input : No signal
Rg=0
Unselected Input : Input signal
Filter : 400Hz to 30kHz
90 100 -
dB
Channel Separation
CS
Rg=0
, Filter : 400Hz to 30kHz
90
100
-
dB
LOUDNESS
Maximum Low Boost Level
G
LDL
Loudness=ON,VOL1=-24dB,f=40Hz
9.5 12 14.5 dB
Maximum High Boost Level
G
LDH
Loudness=ON,VOL1=-24dB,f=10kHz
2.5 5 7.5 dB
TONE
Treble Boost Level
G
HBST
BCT="1",TREB="111", f=10kHz
Vin=0.1Vrms
11.5 14.0 16.5 dB
Treble Flat Level
G
HFLT
TREB="000",f=10kHz
-2.0 0.0 2.0 dB
Treble Cut Level
G
HCUT
BCT="0",TREB="111", f=10kHz
-16.5 -14.0 -11.5 dB
Bass Boost Level
G
LBST
BCB="1",BASS="111", f=100Hz
Vin=0.1Vrms
11.5 14.0 16.5 dB
Bass Flat Level
G
LFLT
BASS="000",f=100Hz
-2.0 0.0 2.0 dB
Bass Cut Level
G
LCUT
BCB="0",BASS="111", f=100Hz
-16.5 -14.0 -11.5 dB
NJW1191
4
!
I
2
C BUS BLOCK CHARACTERISTICS (SDA,SCL)
PARAMETER SYMBOL
MIN.
TYP.
MAX.
UNIT
High Level Input Voltage
V
IH
2.5 - 5.0 V
Low Level Input Voltage
V
IL
0 - 1.5 V
High Level Input Current
I
IH
- - 10
A
Low Level Input Current
I
IL
- - 10
A
Low Level Output Voltage (3mA at SDA pin)
V
OL
0 - 0.4 V
Maximum Output Current
I
OL
-3.0 -
- mA
Maximum Clock Frequency
f
SCL
- - 100
kHz
Data Change Minimum Waiting Time
t
BUF
4.7 -
-
s
Data Transfer Start Minimum Waiting Time
t
HD:STA
4.0
-
-
s
Low Level Clock Pulse Width
t
LOW
4.7 -
-
s
High Level Clock Pulse Width
t
HIGH
4.0 -
-
s
Minimum Start Preparation Waiting Time
t
SU:STA
4.7
-
-
s
Minimum Data Hold Time
t
HD:DAT
5.0
-
-
s
Minimum Data Preparation Time
t
SU:DAT
250
-
-
ns
Rise Time
t
R
- - 1.0
s
Fall Time
t
F
- - 300
ns
Minimum Stop Preparation Waiting Time
t
SU:STO
4.0
-
-
s
I
2
C BUS Load Condition:
Pull up resistance 4k
(Connected to +5V)
Load capacitance 200pF (Connected to GND)
SDA
SCL
t
BUF
t
HD:STA
Sr
P
t
LOW
t
R
t
HD:DAT
t
HIGH
t
F
t
SU:DAT
S
P
t
SU:STA
t
SU:STO
t
HD:STA
NJW1191
5
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APPLICATION CIRCUIT
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!
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APPLICATION NOTES
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
+
+
+
+
GND
VREF
BIAS
INP
U
T
SEL
ECTO
R
MASTER
VOLUME
& LOUDNESS
MASTER
VOLUME
& LOUDNESS
TONE
CONTROL
FRONT
VOLUME
REAR
VOLUME
FRONT
VOLUME
REAR
VOLUME
I
2
C BUS
INTERFACE
SCL
SDA
10F
1F
1F
1F
1F
470pF
39k
4.7k
100nF
4.7nF
100nF
4.7F
2.2k
1F
1F
100nF
4.7F
2.2k
4.7nF
4.7k
100nF
39k
470pF
1F
1F
1F
1F
100F
+9V
V+
+
+
+
+
+
+
+
+
+
+
+
10F
+
10F
10F
+
10F
+
TONE
CONTROL
INP
U
T
SEL
ECTO
R
C1
C2
C3
C4
C5
C6
C7
R1
R2
C8
C9
C10
R3
C11
C12
C13
R4
100
R5 100
C14
C15
C16
C17
R6
C18
C19
C20
R7
R8
C21
C21
C22
C23
C24
C25
Pin No.
Function
Note
2
VREF
C1 can be adjusted rise and fall time of reference voltage at power on and off. Take care that the reduced C1makes
sensitive to ripple of power supply.
3 - 6, 27 -30
Inputs
The Input impedance is designed about 48k ohms. The ground line should be inserted between each input lines to
avoid cross talk.
7,8,25,26
Loudness filter
Taps
Loudness frequency can be adjusted with external parts(See page 6) . Especialy, 8 and 25 pins should be kept from
large signal lines such as digital signal lines or the other sound signal lines to avoid digitaly noise or cross talk in
Loudness mode.
9,10,11,22,23,
24
Tone filter
terminals
Tone Bass and Treble cut off frequency can be adjusted with external parts(See page6). These pins should be kept
from large signal lines such as digital signal lines or the other sound signal lines to avoid the digitaly noise or cross
talk.
12,21
Tone outputs
Output impedance is designed about 50 ohms.
13,20
Balance Fedar
volume inputs
Input impedance is designed about 24k ohms.
14,15,18,19
Balance Fedar
volume
outputs
Output impedance is designed about 50 ohms.
16,17
I
2
C control
signal ports
These terminals should be inserted resistance about 100 ohms between terminal and signal source to reduce the
digitaly noise. These lines should be kept from analog signal lines and or near by the chip to avoid digitaly noise.
Inserted ground line between analog line and digital line should be recommended.
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