NJW1155
- 1 -
P R E L I M I N ALY
AUDIO PROCESSOR with SOUND ENHANCEMENT and SRS 3D STEREO
I
I
I
I GENERAL DESCRIPTION I
I
I
I PACKAGE OUTLINE
The NJW1155 is an audio processor that includes Sound
enhancement (BBE) and SRS 3D Stereo. It includes all of
the audio signal processing functions for TV such as tone
control, balance, volume, mute, and AGC .
The SRS 3D stereo technology reproduces 3D stereo
surround sound effect using only two speakers.
The sound enhancement regenerates high definitive and
nearly real sound.
All of internal status and variables are controlled by I
2
C
BUS interface.
I
I
I
I FEATURES
Operating Voltage
7.5 to 13V
I
2
C BUS Interface
BBE Sound Enhancement (Low Boost and High Boost: 15dB max.)
AGC Circuit (It reduces volume difference among input sources.)
SRS 3D Stereo
Simulated Surround
Bi-CMOS Technology
Package Outline
SDMP30
I
I
I
I BLOCK DIAGRAM
NJW1155M
AGC
VOL1
VOL1
Bias
VOL
SRS
3D Stereo
&
Simulated
Surround
TONE
TONE
BBE
BBE
VOL
I
2
C Bus
Interface
NJW1155
- 2 -
I
I
I
I PIN FUNCTION
No. Symbol
Function
No
Symbol
Function
1
INa
Ach Input
16
Vcc
Power Supply Pin
2
BBE1a
Ach BBE Filter1 (Process)
17
AUX1
Auxiliary Output1
3
BBE2a
Ach BBE Filter2 (Lo Contour)
18
AUX0
Auxiliary Output0
4
TONEDC1a
Ach Tone Output
19
BBE OUTb
Bch Output for the Other Accessories
5
TONEDC2a
Ach Volume2 Input
20
VOL2 INb
Bch Input from the Other Accessories
6 TONE-Ha
Ach
Treble
Filter
21
VREF
Reference
Voltage
7
TONE-La
Ach Bass Filter
22
SRS-FIL2
SRS Surround Filter2
8 OUTa
Ach
Output
23
OUTb
Bch
Output
9
AGC
AGC Filter
24
TONE-Lb
Bch Bass Filter
10
SRS/SS-FIL1 SRS and Simulated Stereo Filter1
25
TONE-Hb
Bch Treble Filter
11
VOL2 INa
Ach Input From the Other Accessories
26
TONEDC2b
Bch Volume2 Input
12
BBE OUTa
Ach Output for the Other Accessories
27
TONEDC1b
Bch Tone Output
13
SDA
SDA Data Input (I
2
C BUS)
28
BBE2b
Bch BBE Filter2 (Process)
14
SCL
SCL Data Input (I
2
C BUS)
29
BBE1b
Bch BBE Filter1 (Lo Contour)
15 GND
GND
30
INb
Bch
Input
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
30
29
28
27
26
INa
BBE1a
BBE2a
TONE-Ha
TONE-La
BBEOUTa
VOL2 INa
OUTa
AGC
SRS/SS-FIL1
TONEDC1a
TONEDC2a
SDA
SCL
GND
INb
BBE1b
BBE2b
TONE-Hb
TONE-Lb
VOL2 INb
OUTb
SRS-FIL2
VREF
TONEDC1b
25
24
23
22
21
TONEDC2b
AUX0
AUX1
Vcc
20
19
18
17
16
BBEOUTb
NJW1155
- 3 -
I
I
I
I ABSOLUTE MAXIMUM RATING (Ta=25C)
PARAMETER SYMBOL
RATING
UNIT
Supply Voltage
V
+
15 V
Power Dissipation
P
D
700
mW
Operating Temperature Range
Topr
-20 to +75
C
Storage Temperature Range
Tstg
-40 to +125
C
I
I
I
I ELECTRICAL CHARACTERISTICS
( Ta=25C, V+=9V, Rg=600
, R
L
=47k
, Vin=100mVrms/1kHz unless otherwise specified)
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT
Operating Voltage
V
+
7.5
9.0
13.0
V
Supply Current
I
CC
No
Signal
- 13 25 mA
Reference Voltage
V
REF
No
Signal
4.0 4.5 5.0
V
Maximum Input Voltage
V
IM
VOL=-20dB,THD=10%
2.8 3.0 - Vrms
Maximum Output Voltage
V
OM
OUTPUT
VOL=0dB,THD=1%
- 2.5 - Vrms
Channel Balance
G
CB
VOL=0dB
- 0.0 -
dB
Balance Boost A
BA
BST
CHS="0",BAL="11111"
-
0.0
-
dB
Balance Cut A
BA
CUT
CHS="1",BAL="11111"
Vin = 1Vrms
- - -70
dB
Balance Boost B
BB
BST
CHS="1",BAL="11111"
-
0.0
-
dB
Balance Cut B
BB
CUT
CHS="0",BAL="11111"
Vin = 1Vrms
- - -70
dB
Total Harmonic Distortion
THD
Vo=0.5Vrms
BW=400Hz to 30kHz
- 0.005
0.01 %
Maximum Gain
G
VMAX
VOL=
0dB
-
0.0
-
dB
Minimum Gain
G
VMIN
VOL=
MUTE
-
-
-70
dB
Channel Separation
CS
Vin = 2Vrms
-
-
-70
dB
Output Noise 1
V
NO1
VOL = 0dB
A-weighted
-
-
-100
(10)
-90
(32)
dBV
(
Vrms)
Output Noise 2
V
NO2
VOL = MUTE
A-weighted
-
-
-105
(5.6)
-95
(18)
dBV
(
Vrms)
Logic Output : High
4.5
-
5.0
AUX Output Voltage
V
AUX
Logic Output : Low
0
-
0.3
V
BW : Band Width
NJW1155
- 4 -
TONE CONTROL
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT
High Frequency Boost
HF
BST
BCT="1",TREB="1111",
f=10kHz
12.5 15.0 17.5 dB
High Frequency Flat
HF
FLT
TRBE="0000",f=10kHz
-2.0 0.0 2.0
dB
High Frequency Cut
HF
CUT
BCT="0",TRBE="1111",
f=10kHz
-17.5 -15.0 -12.5 dB
Low Frequency Boost
LF
BST
BCB="1",BASS="1111",
f=100Hz
12.5 15.0 17.5 dB
Low Frequency Flat
LF
FLT
BASS="0000",f=100Hz
-2.0 0.0 2.0
dB
Low Frequency Cut
LF
CUT
BCB="0",BASS="1111",
f=100Hz
-17.5 -15.0 -12.5 dB
AGC CONTROL(AGC-ON)
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT
AGC Boost
AGC
BST
Vin=50mVrms,
f=1kHz
1.5 3.5 5.5 dB
AGC Flat1
AGC
FLT1
Vin=150mVrms,
f=1kHz
-2.5 0.0
2.5
dB
AGC Flat2
AGC
FLT2
Vin=300mVrms,
f=1kHz
-2.5 0.0
2.5
dB
AGC Flat3
AGC
FLT3
Vin=400mVrms,
f=1kHz
-2.5 0.0
2.5
dB
AGC Flat4
AGC
FLT4
Vin=540mVrms,
f=1kHz
-2.5 0.0
2.5
dB
AGC Cut
AGC
CUT
Vin=2Vrms,
f=1kHz
-14 -10 -6.0
dB
BBE(BBE-ON)
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT
BBE Low Frequency
Boost Range
BBE
LOW
BBE-Low="1111", f = 50Hz
-
15.0
-
dB
BBE High Frequency
Boost Range
BBE
HIGH
BBE-High="1111", f = 10KHz
-
15.0
-
dB
SIMULATED SURROUND (Simulated Surround-ON, f=1kHz)
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT
SURROUND SIM A
SR
SIMA
Ain+Bin
Aout
1.0 3.0 5.0 dB
SURROUND SIM B
SR
SIMB
Ain+Bin
Bout
1.0 3.0 5.0 dB
SRS 3D-Stereo (SRS 3D Stereo-ON, f=125Hz)
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT
SRS GAIN HIGH 1
SRS
GH1
Ain
Aout,
Mode=High 10.0 12.0 14.0 dB
SRS GAIN HIGH 2
SRS
GH2
Bin
Bout,
Mode=High 10.0 12.0 14.0 dB
SRS GAIN LOW 1
SRS
GL1
Ain
Aout,
Mode=Low 4.0 6.0 8.0 dB
SRS GAIN LOW 2
SRS
GL2
Bin
Bout,
Mode=Low 4.0 6.0 8.0 dB
SRS GAIN HIGH 3
SRS
GH3
Bin
Aout, Mode=High
6.8
8.8
10.8
dB
SRS GAIN HIGH 4
SRS
GH4
Ain
Bout, Mode=High
6.8
8.8
10.8
dB
NJW1155
- 5 -
I
I
I
I I
2
C BUS BLOCK CHARACTERISTICS (SDA,SCL)
PARAMETER SYMBOL
MIN.
TYP.
MAX.
UNIT
High Level Input Voltage
V
IH
3.0 - 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
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