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PDF NJW1181 Data sheet ( Hoja de datos )
| Número de pieza | NJW1181 | |
| Descripción | Audio Processor | |
| Fabricantes | JRC | |
| Logotipo |  |
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NJW1181
AUDIO PROCESSOR with BBE & Dynamic Bass Boost
s GENERAL DESCRIPTION
The NJW1181 is a TV audio processor with BBE Sound
Enhancement and Dynamic Bass Boost.
The NJW1181 contains all necessary functions to process
TV audio signal such as volume control, tone control,
balance, mute and AGC function.
All of internal status and variables are controlled by I2C
BUS.
s PACKAGE OUTLINE
NJW1181FP1
s FEATURES
q Operating Voltage
q I2C BUS Interface
7.5 to 13V
q BBE Sound Enhancement
(Low Boost and High Boost: 15dB max.)
q eala(NJRC Surround)/Simulated Stereo
q Dynamic Bass Boost Function
q AGC Circuit
(Selectable 4-stage compression level by I2C BUS)
q Bi-CMOS Technology
q Package Outline
QFP48-P1
s BLOCK DIAGRAM
TONE TONE BBE BBE
SURFIL1 -Lb -Hb -Lb -Hb
HBSTb
BB2 BB4 BB-
BB1 BB3 FIXOUT OUT1b OUT2b
ADDIN1
SDA SCL AUX
VOL1
INb /
AGC
TONE
BBE
High
Boost
VOL2
AGC
Control
SUR
Bass Boost
VOL1
INa /
AGC
TONE
BBE
High
Boost
VOL2
VOL3
I2CBus
Interface
VOL4
Bias
CVa
CVb
CTL
CTH
CBH
CSR
CBB
CA1
CA2
CO1
CO2
AGCINT
SURFIL2 TONE TONE BBE BBE
-La -Ha -La -Ha
HBSTa
BB BB BB
-AGCINT -SENSE -AGCOUT
OUT1a OUT2a ADDIN2
GND V+ VREF
-1-
1 page  
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♦ADDIN1
PARAMETER
ADDIN1 Gain
ADDIN1 Mute
High Boost
♦ADDIN2
PARAMETER
ADDIN2 Gain
ADDIN2 Mute
NJW1181
SYMBOL
ADD1GV
ADD1MUTE
ADD1HBST
TEST CONDITION
ADDIN1=”111”
ADDIN1=”000”
ADDIN1=”111”, f=10kHz
SYMBOL
TEST CONDITION
ADD2GV ADDIN2=”11111”
ADD2MUTE ADDIN2=”00000”
MIN.
-
-
-
TYP.
0.0
-80
2.2
MAX.
-
-
-
UNIT
dB
dB
dB
MIN.
-
-
TYP.
0.0
-80
MAX.
-
-
UNIT
dB
dB
-5-
5 Page 
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■TERMINAL DESCRIPTION
No. SYMBOL
FUNCTION
21 AUX
Auxiliary Output
NJW1181
EQUIVALENT CIRCUIT
VDD
VOLTAGE
AUX
100
0V
(AUX=Low)
22 VREF
Reference Voltage
VREF
240k
240k
23 CO1
24 CO2
Pop Noise Reduction for
Output SW1 ON/OFF
Pop Noise Reduction for
Output SW2 ON/OFF
VDD
CO1
CO2
48k
V+/2
0V
(OUT1/2=Mute)
25 CBH
Pop Noise Reduction for
BBE ON/OFF
36k 12k
CBH VREF-0.7V
(BBE=OFF)
- 11 -
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet NJW1181.PDF ] | |
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