NJW1140 Datasheet, PDF (1/15 Pages) New Japan Radio – AUDIO PROCESSOR with SRS

NJW1140
PRELIMINARY
AUDIO PROCESSOR with SRS
s GENERAL DESCRIPTION
The NJW1140 is a sound processor includes all of the
functions required to process the audio signal for TV, such
as tone control, balance, volume, mute, and AGC functions.
Also the NJW1140 performs SRS 3D Stereo which
regenerates 3D surround sound with only two speakers.
All of the internal status and variables are controlled by
I²C BUS interface.
s PACKAGE OUTLINE
s FEATURES
q Operating Voltage
8 to 13V
q I²C BUS Interface
q Internal 6 Input Audio Selectors and Monitor Output
q The AGC circuit reduces volume difference among input sources.
q Variable AGC Compression Level via I²C (4-levels)
q Includes Dual Surround (SRS 3D Stereo and Simulated Stereo)
q Variable Surround Effect Level via I²C (SRS mode, 2-Levels)
q Low Noise VCA
q Bi-CMOS Technology
q Package Outline
SOP40
s BLOCK DIAGRAM
NJW1140GK1
IN1a
IN2a
IN3a
IN4a
IN5a
IN6a
IN1b
IN2b
IN3b
IN4b
IN5b
IN6b
MONa AGC
SEL
AGC
SEL
MONb
VOL1
VOL1
TONE TONE
-Ha -La
OUTa
SRS
3D Stere o
&
Sim ulated
Stere o
TONE
TONE
VOL2
VOL2
I²C BUS
Interface
SDA
SCL
CVA
CVB
CTH
CTL
CSB
CSR
Bias
GND
Vcc
TONETONE
-Hb -Lb
OUTb
Vref
- 1 -E