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PDF NJW1138 Data sheet ( Hoja de datos )
| Número de pieza | NJW1138 | |
| Descripción | AUDIO PROCESSOR | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJW1138
P R E L I M I N A LY
AUDIO PROCESSOR
www.dastasGhEeeNt4EuR.coAmL DESCRIPTION
The NJW1138 is an audio processor. It includes all of
functions processing audio signal for TV, such as tone
control, balance, volume, mute, NJRC original surround, and
AGC functions.
The NJRC original surround system reproduces natural
surround sound and clear vocal orientation.
All of internal status and variables are controlled by I2C
BUS interface.
s PACKAGE OUTLINE
NJW1138L
NJW1138M
s FEATURES
q Operating Voltage
8 to 13V
q I2C BUS Interface
q AGC Circuit (It reduces volume difference among input sources.)
q eala(NJRC Original Surround)
q Simulated Surround
q Bi-CMOS Technology
q Package Outline
SDIP30, SDMP30
s BLOCK DIAGRAM
VOL1
AGC
e ala
&
Sim ulated
Surround
VOL1
TONE
VOL2
I2C Bus
Interface
TONE
VOL2
Bias
- 1 –F
1 page  
NJW1138
s I2C BUS BLOCK CHARACTERISTICS (SDA,SCL)
PARAMETER
High Level Input Voltage
www.datLasohweeLt4euv.ceolmInput Voltage
High Level Input Current
Low Level Input Current
Low Level Output Voltage (3mA at SDA pin)
Maximum Output Current
Maximum Clock Frequency
Data Change Minimum Waiting Time
Data Transfer Start Minimum Waiting Time
Low Level Clock Pulse Width
High Level Clock Pulse Width
Minimum Start Preparation Waiting Time
Minimum Data Hold Time
Minimum Data Preparation Time
Rise Time
Fall Time
Minimum Stop Preparation Waiting Time
SYMBOL
VIH
VIL
IIH
IIL
VOL
IOL
fSCL
tBUF
tHD:STA
tLOW
THIGH
tSU:STA
tHD:DAT
tSU:DAT
tR
tF
tSU:STO
MIN.
3.0
0
-
-
0
-3.0
0
4.7
4.0
4.7
4.0
4.7
5.0
250
-
-
4.7
I2C BUS Load Condition: Pull up resistance 4kΩ (Connected to +5V)
Load capacitance 200pF (Connected to GND)
TYP.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX.
5.0
1.5
10
10
0.4
-
100
-
-
-
-
-
-
-
1.0
300
-
UNIT
V
V
µA
µA
V
mA
kHz
µs
µs
µs
µs
µs
µs
ns
µs
ns
µs
SDA
tBU
SCL
tR
tHD:ST tLOW
PS
tF
tHD:DA
tHIGH
tSU:DA
tHD:ST
tSU:ST
Sr
tSU:ST
P
-5-
5 Page 
NJW1138
INSTRUCTION CODE
a) MASTER VOLUME SETTING
Select
BIT
www.datashAededt4rue.scosm
D7
D6
D5
D4
D3
D2
D1
D0
00H VOL
The volume control for both Ach and Bch(0.33dB/step).
The volume is consisted of volume1 and volume2 and the level is divided into half to each volume1 and
volume2.
b) BALANCE, AGC AND SURROUND SETTING
Select
Address
D7
D6
D5
D4
BIT
01H CHS
BAL
D3
D2 D1 D0
AGC
SUR
•CHS : Channel select for balance control
“0” : Ach “Bch is attenuated”
“1” : Bch “Ach is attenuated”
•BAL : Balance control for both Ach and Bch(1dB/Step)
The balance is consisted of volume1 and volume2 and the level is divided into half to each volume1 and
volume2.
•AGC : AGC switch
“0” : AGC OFF
“1” : AGC ON (Default Setting : 150mVrms)
•SUR : Surround mode switch
“0” : Surround OFF
“1” : Surround ON(Default Setting : Surround Effect1)
c)TONE CONTROL BASS SETTING
Select
BIT
Address
D7
D6
D5
D4
D3
02H BCB
BASS
D2
BCSB
D1 D0
SUB-BASS
•BCB : Boost cut select for Bass control
“0” : Cut
“1” : Boost
•BASS: BASS control
Cut Level
: -15dB to 0dB(1dB/Step)
Boost Level
: 0dB to +15dB(1dB/Step)
•BCSB : Boost cut select for SUB-BASS control
“0” : Cut
“1” : Boost
•SUB-BASS: SUB- BASS control(1dB/Step)
Sub-Cut Level
: -3dB to 0dB(1dB/Step)
Sub-Boost Level : 0dB to +3dB(1dB/Step)
- 11 -
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet NJW1138.PDF ] | |
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