NJW1148
Audio Processor with Sound Enhancement and TruSurround Virtualizer
I
GENERAL DESCRIPTION
The
NJW1148
is an audio processor with BBE sound enhancement
and SRS Labs' TruSurround virtualizer. It includes all of functions
processing audio signal for TV, such as volume, balance, mute, line out,
tone control, eala NJRC surround and simulated stereo functions. All of
2
internal status and variables are controlled by I C BUS.
I
FEATURES
G
Operating Voltage
8 to 10 V
2
G
I C BUS Interface
(Fast-Mode)
G
Passive TruSurround
G
BBE
0dB to +15dB(0.5dB/step)
G
eala (surround effect ; 2 steps) and Simulated Stereo
GVolume
0 to -80dB, MUTE(0.33dB/step)
GBalance
0 to -30dB, MUTE(1dB/step)
GTone
Control
-15dB to +15dB(0.5dB/step)
G
Bi-CMOS Technology
G
Package Outline
QFP48-P1
I
BLOCK DIAGRAM
BBECHA
BBECLA
TS filter
I
PACKAGE OUTLINE
NJW1148FP1
LINEOUTA
TONECHA
TONECLA
OUTA
GND
V+
Bias
VREF
MIXOUT
INA
AGC
VOL1
Passive Matrix
TruSurround
/ SRS 3D Stereo
/ eala
/ Simulated Stereo
VOL1
BBE
TONE
VOL2
Buffer
VOL2
LFIN
LFOUT
OUTC
I C Interface
& Logic Control
INB
BBE
TONE
VOL2
CAP
BBECHB
BBECLB
TONECHB
TONECLB
OUTB
TS filter
SDA
SCL
AGCTC
LINEOUTB
eala filter
2
–1–
NJW1148
I
PIN FUNCTION
38
25
39
24
48
15
1
14
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
SYMBOL
FUNCTION
TruSurround Filter Capacitor 3
TS3
Ach Input
INA
Ach BBE High-Pass Filter Capacitor
BBECHA
Ach BBE Low-Pass Filter Capacitor
BBECLA
Ach TONE Treble Filter Capacitor
TONECHA
TONECLA
Ach TONE Bass Filter Capacitor
LINEOUTA
Ach Line Output
Ach Output
OUTA
Center Output
OUTC
No Connection
N.C.
AGC Smoothing Filter Capacitor
AGCTC
Surround switching noise rejection Capacitor
SURTC
Ach Volume switching noise rejection Capacitor
VOLATC
Bch Volume switching noise rejection Capacitor
VOLBTC
VOLCTC
Center Volume switching noise rejection Capacitor
I
2
C Data Input
SDA
I
2
C Clock Input
SCL
Ground
GND
No Connection
N.C.
Power Supply
V+
Reference Voltage stabilizing Capacitor
VREF
Tone Control Treble switching noise rejection Capacitor
TONEHTC
TONELTC
Tone Control Bass switching noise rejection Capacitor
OUTTC
Line Output switching noise rejection Capacitor
No.
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
SYMBOL
BBELTC
BBEHTC
N.C.
LFOUT
LFIN
MIXOUT
OUTB
LINEOUTB
TONECLB
TONECHB
BBECLB
BBECHB
INB
SRS4
SRS3
SRS2
SRS1
SPACE1
CENTER
N.C.
SPACE2
CEALA
TS1
TS2
FUNCTION
BBE Low switching noise rejection Capacitor
BBE High switching noise rejection Capacitor
No Connection
Buffer Output for LPF
Buffer Input for LPF
Ach Bch Mixed Output
Bch Output
Bch Line Output
Bch TONE Bass Filter Capacitor
Bch TONE Treble Filter Capacitor
Bch BBE Low-Pass Filter Capacitor
Bch BBE High-Pass Filter Capacitor
Bch Input
SRS Filter Capacitor 4
SRS Filter Capacitor 3
SRS Filter Capacitor 2
SRS Filter Capacitor 1
SPACE Volume1
CENTER Volume
No Connection
SPACE Volume2
eala Filter Capacitor
TruSurround Filter Capacitor 1
TruSurround Filter Capacitor 2
–2–
NJW1148
I
ABSOLUTE MAXIMUM RATING (Ta=25°C)
°
PARAMETER
SYMBOL
Supply Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
V
P
D
Topr
Tstg
+
+
RATING
12
1500
(*JEDEC2 layers PCB mount
)
-20 to +75
-40 to +125
UNIT
V
mW
°C
°C
I
ELECTRICAL CHARACTERISTICS
PARAMETER
Operating Voltage
Supply Current
Reference Voltage
Maximum Input Voltage
Maximum Output Voltage
Channel Balance
Balance Boost A
Balance Cut A
Balance Boost B
Balance Cut B
Total Harmonic Distortion
Maximum Voltage Gain
Minimum Voltage Gain
MIX Output Voltage Gain
Line Output Voltage Gain
Channel Separation
Output Noise 1
Output Noise 2
Output Noise 3
Output Noise 4
MODE ; VOL=0dB, BAL=0dB,SUR=OFF, AGC=OFF, BBE=OFF, Tone=0dB)
(Ta=25°C, V =9V, R
L
=47kΩ, Vin=100mVrms/1kHz
TEST CONDITION
No Signal
No Signal
VOL=-20dB,THD=10%
OUTPUT
VOL=0dB,THD=1%
VOL=0dB
CHS=”0”,BAL=Mute
Vin = 1Vrms
CHS=”1”,BAL=Mute
Vin = 1Vrms
CHS=”1”,BAL=Mute
Vin = 1Vrms
CHS=”0”,BAL=Mute
Vin = 1Vrms
Vo=0.5Vrms
BW=400Hz to 30kHz
VOL= 0dB
VOL= Mute
MIXOUT, VOL=0dB
LINEOUT, VOL=0dB
Vin = 1Vrms
VOL = 0dB
BW=400Hz to 30kHz
VOL = Mute
BW = 400Hz to 30kHz
LINEOUT, VOL = 0dB
BW=400Hz to 30kHz
LINEOUT, VOL = Mute
BW = 400Hz to 30kHz
+
SYMBOL
V
I
CC
V
REF
V
IM
V
OM
G
CB
G
BBA
G
BCA
G
BBB
G
BCB
THD
G
VMAX
G
VMIN
G
VMIX
G
VLINE
CS
V
NO1
V
NO2
V
NO3
V
NO4
+
MIN.
8.0
-
4.0
2.8
-
-1.5
-2.0
-
-2.0
-
-
-2.0
-
-2.0
2.5
-
-
-
-
-
-
-
-
-
TYP.
9.0
30
4.5
3.0
2.5
0.0
0.0
-
0.0
-
-
0.0
-
0.0
4.5
-
-90
(31.6)
-106
(5.0)
-85
(56.2)
-101
(8.9)
MAX.
10.0
45
5.0
-
-
1.5
2.0
-70
2.0
-70
0.5
2.0
-70
2.0
6.5
-70
-85
(56.2)
-96
(15.8)
-80
(100)
-91
(28.2)
UNIT
V
mA
V
Vrms
Vrms
dB
dB
dB
dB
dB
%
dB
dB
dB
dB
dB
dBV
(µVrms)
dBV
(µVrms)
dBV
(µVrms)
dBV
(µVrms)
BW :
Band Width
N
TONE CONTROL CHARACTERISTICS
PARAMETER
Treble Boost Gain
Treble Boost Flat
Treble Boost Cut
Bass Boost Gain
Bass Boost Flat
Bass Boost Cut
MODE ; VOL=0dB, BAL=0dB, SUR=OFF, AGC=OFF, BBE=OFF)
(Ta=25°C, V =9V, R
L
=47kΩ, Vin=100mVrms/1kHz
TEST CONDITION
TREB=+15dB, f=10kHz
TREB=0dB,f=10kHz
TRBE=-15dB, f=10kHz
BASS=+15dB, f=100Hz
BASS=0dB, f=100Hz
BASS=-15dB, f=100Hz
MIN.
12.5
-2.0
-17.5
12.5
-2.0
-17.5
TYP.
15.0
0.0
-15.0
15.0
0.0
-15.0
MAX.
17.5
2.0
-12.5
17.5
2.0
-12.5
UNIT
dB
dB
dB
dB
dB
dB
SYMBOL
G
HFBST
G
HFFLT
G
HFCUT
G
LFBST
G
LFFLT
G
LFCUT
–3–
NJW1148
N
AGC CHARACTERISTICS
PARAMETER
AGC Boost
AGC Flat 1
AGC Flat 2
AGC Flat 3
AGC Flat 4
AGC Cut
N
BBE CHARACTERISTICS
PARAMETER
Low Boost Gain
High Boost Gain
N
eala CHARACTERISTICS
PARAMETER
Simulated Stereo A
Simulated Stereo B
Surround 3D1
Surround 3D2
Surround 3D3
Surround 3D4
N
TruSurround CHARACTERISTICS
PARAMETER
TruSurround Gain1
TruSurround Gain2
TruSurround Gain3
N
SRS 3D CHARACTERISTICS
PARAMETER
Feed Through Gain
L+R Gain
L-R Gain
(Ta=25°C, V =9V, R
L
=47kΩ
SYMBOL
G
AGCBST
G
AGCFLT1
G
AGCFLT2
G
AGCFLT3
G
AGCFLT4
G
AGCCUT
+
+
MODE ; VOL=0dB, BAL=0dB, SUR=OFF, AGC=ON, BBE=OFF, Tone=0dB)
TEST CONDITION
Vin=50mVrms, f=1kHz
Vin=300mVrms, f=1kHz
Vin=400mVrms, f=1kHz
Vin=500mVrms, f=1kHz
Vin=600mVrms, f=1kHz
Vin=2Vrms, f=1kHz
MIN.
1.5
-2.5
-2.5
-2.5
-2.5
-14
TYP.
3.5
0.0
0.0
0.0
0.0
-10
MAX.
5.5
2.5
2.5
2.5
2.5
-6.0
UNIT
dB
dB
dB
dB
dB
dB
MODE ; VOL=0dB, BAL=0dB, SUR=OFF, AGC=OFF, Tone=0dB)
(Ta=25°C, V =9V, R
L
=47kΩ, Vin=100mVrms/1kHz
SYMBOL
G
BBELOW
G
BBEHIGH
+
TEST CONDITION
BBE-LOW =+15dB, f=50Hz
BBE-HIGH=+15dB,f=10kHz
MIN.
12.5
12.5
TYP.
15
15
MAX.
17.5
17.5
UNIT
dB
dB
MODE ; VOL=0dB, BAL=0dB, AGC=OFF, BBE=0dB, Tone=0dB)
(Ta=25°C, V =9V, R
L
=47kΩ, Vin=100mVrms/1kHz
SYMBOL
G
SIMA
G
SIMB
G
3D1
G
3D2
G
3D3
G
3D4
TEST CONDITION
LIN+RIN→OUTa, f=1KHz
SUR=MONO
LIN+RIN→OUTb, f=1KHz
SUR=MONO
MIN.
1.0
1.0
10
-2.0
8
0
TYP.
3.0
3.0
12
0.0
10
2
MAX.
5.0
5.0
14
2.0
12
4
UNIT
dB
dB
dB
dB
dB
dB
LIN
→
OUTa, f=100Hz
SUR=eala6
LIN
→
OUTa, f=10KHz
SUR=eala6
LIN
→
OUTb, f=100Hz
SUR=eala6
LIN
→
OUTa, f=100Hz
SUR=eala1
+
MODE; VOL=0dB, BAL=0dB, AGC=OFF, BBE=OFF, Tone=0dB)
(Ta=25°C, V =9V, R
L
=47kΩ, Vin=100mVrms/1kHz
TEST CONDITION
AIN
→
AOUT, f=1KHz
SUR=TS
AIN
→
BOUT, f=1KHz
SUR=TS
A+BIN
→
COUT, f=1KHz
SUR=TS2.1
+
SYMBOL
G
TS1
G
TS2
G
TS3
MIN.
0.3
-13.4
-1.1
TYP.
2.3
-11.4
0.9
MAX.
4.3
-9.4
2.9
UNIT
dB
dB
dB
MODE; VOL=0dB, BAL=0dB, AGC=OFF, BBE=OFF, Tone=0dB)
(Ta=25°C, V =9V, R
L
=47kΩ, Vin=100mVrms/1kHz
SYMBOL
G
THROUGH
G
L+R
G
L-R
TEST CONDITION
AIN
→
AOUT, f=1KHz
SUR=SRS 3D
AIN
→
AOUT, f=1KHz
SUR=SRS 3D
AIN
→
AOUT, f=125Hz
SUR=SRS 3D
MIN.
-20.2
-15.0
-2.0
TYP.
-18.2
-13.0
0.0
MAX.
-16.2
-11.0
2.0
UNIT
dB
dB
dB
–4–
NJW1148
I
I C BUS CHARACTERISTICS
2
2
(SDA, SCL)
SYMBOL
V
IL
V
IH
V
hys
V
OL
t
of
t
SP
I
i
C
i
f
SCL
t
HD:STA
t
LOW
t
HIGH
t
SU:STA
t
HD:DAT
t
SU:DAT
t
r
t
f
t
SU:STO
t
BUF
C
b
V
nL
V
nH
MIN.
0.0
3.0
0.25
0
20+0.1C
b
I C BUS Load Conditions: Pull up resistance 4kΩ (Connected to +5V), Load capacitance 200pF (Connected to GND)
PARAMETER
Low Level Input Voltage
High Level Input Voltage
Hysteresis of Schmitt trigger inputs
LOW level output voltage (3mA at SDA pin)
Output fall time from V
IHmin
to V
ILmax
with
a bus capacitance from 10pF to 400pF
Pulse width of spikes which must be suppressed by the input filter
TYP.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX.
1.5
5.0
-
0.4
250
50
10
10
400
-
-
-
-
0.9
-
300
300
-
-
400
-
-
UNIT
V
V
V
V
ns
ns
µA
pF
kHz
µs
µs
µs
µs
µs
ns
ns
ns
µs
µs
pF
V
V
0
-10
-
-
0.6
1.3
0.6
0.6
-
100
-
-
0.6
1.3
-
0.5
1
Input current each I/O pin with an input voltage between 0.1V
DD
and 0.9V
DDmax
Capacitance for each I/O pin
SCL clock frequency
Hold time (repeated) START condition.
LOW period of the SCL clock
HIGH period of the SCL clock
Set-up time for a repeated START condition
Data hold time
Data set-up time
Rise time of both SDA and SCL signals
Fall time of both SDA and SCL signals
Set-up time for STOP condition
Bus free time between a STOP and START condition
Capacitive load for each bus line
Noise margin at the LOW level
Noise margin at the HIGH level
C
b
; total capacitance of one bus line in pF.
SDA
t
f
t
r
t
SU:DAT
t
f
t
HD:STA
t
SP
t
r
t
BUF
SCL
t
HD:STA
S
t
LOW
t
HD:DAT
t
HIGH
t
SU:STA
Sr
t
SU:STO
P
S
–5–
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
