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PDF NJW1164 Data sheet ( Hoja de datos )
| Número de pieza | NJW1164 | |
| Descripción | AUDIO PROCESSOR | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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PRELIMINARY
NJW1164
AUDIO PROCESSOR with BBE
www.datasheet4u.com
s GENERAL DESCRIPTION
The NJW1164 is a TV audio processor with sound
enhancement (BBE).
The NJW1164 contains all necessary functions to process
TV audio signal such as volume control, tone control,
balance, mute, AGC and NJRC's proprietary surround sound
process, eala. The eala reproduces a natural surround
sound with clear vocal orientation.
The total modes and variables are controlled by the I2C bus
interface.
s PACKAGE OUTLINE
NJW1164L
NJW1164M
s FEATURES
q Operating Voltage
7.5 to 13V
q I2C BUS Interface
q BBE Sound Enhancement (Low Boost and High Boost: 15dB max.)
q eala (NJRC Original Surround)
q AGC Circuit (It reduces volume difference among input sources.)
q Simulated Surround
q Bi-CMOS Technology
q Package Outline
SDIP30, SDMP30
s BLOCK DIAGRAM
VOL1
BBE
AGC
e ala
&
Sim ulated
Surround
VOL1
BBE
TONE
VOL2
I2C Bus
Interface
TONE
VOL2
Bias
-1-
1 page  
PRELIMINARY
NJW1164
s I2C BUS BLOCK CHARACTERISTICS (SDA, SCL)
PARAMETER
SYMBOL
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
VIH
VIL
IIH
IIL
VOL
IOL
fSCL
tBUF
tHD:STA
tLOW
THIGH
tSU:STA
tHD:DAT
tSU:DAT
tR
tF
tSU:STO
MIN.
2.5
0
-
-
0
-3.0
-
4.7
4.0
4.7
4.0
4.7
5.0
250
-
-
4.0
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
tBUF
SCL
tR
tHD:STA tLOW
PS
tF
tHD:DAT
tHIGH
tSU:DAT
tHD:STA
tSU:STA
Sr
tSU:STO
P
-5-
5 Page 
PRELIMINARY
2. Tone Control
a) Bass: Setting the Cut-off frequency
Bass Filter
www.datasheet4u.com
12k 12k
8pin
23pin
C
b) Treble: Setting the Cut-off frequency
Treble Filter
fC
=
2π
M
×C ×12k
M changes by gain setting of Tone.
M ≈ 2.65
M ≈ 3.45
M ≈ 8.10
(±15dB)
(±10dB)
(±5dB)
10k
7pin
24pin
C
fC
=
2π
N
× C ×10k
N changes by gain setting of Tone.
N ≈ 0.76
N ≈ 0.58
N ≈ 0.25
(±15dB)
(±10dB)
(±5dB)
NJW1164
3. BBE, Surround mode and "OUT" switch settings
The click noise may be generated by changing the BBE, Surround mode setting and “OUT” switch.
Provide the external circuit for avoiding the click noise on above condition.
4. External parts for BBE circuits
The constant of capacitors connected to the terminals No.2, 3, 28 and 29 are designated by BBE Sound Inc.
Do not change the constant of these capacitors without the approval of BBE Sound Inc.
5. AUX1, AUX0 Terminal
AUX1/0 are enable to control external logic circuit is
Source current
: 1mA typ. (Ta=25ûC)
Sink current
: 0.5mA typ. (Ta=25ûC)
6. Capacitor for Reference Voltage (21pin)
22µF should be recommended for ripple filter connected to Vref terminal (21pin).
Reducing this capacity may cause to reduce the maximum attenuation level and to increase the output
noise.
- 11 -
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet NJW1164.PDF ] | |
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