NJW1157
8-CHANNEL ELECTRONIC VOLUME WITH INPUT SELECTOR
s
GENERAL DESCRIPTION
NJW1157
is an eight channel electronic volume IC.
It includes Input selector, tone control, volume, mute,
input selector gain control, volume output gain control
and 5 REC outputs. It’s suitable for multi-channel
audio equipments such as AV receivers and DVD
receivers. These functions are controlled by
three-wired serial data.
s
FEATURES
q
Operating Voltage
q
Three-Wired Serial Data Control
q
Input Selector (x 12)
q
REC Output (x 5) with Selector
q
Input Selector Gain Control
q
Volume Output Gain Control
q
Volume
q
Tone Control
q
Subwoofer output addition to L, R channel output
q
Subwoofer output ON/OFF control
q
Bi-CMOS Technology
q
Package Outline
s
BLOCK DIAGRAM
RECB1R
RECA1R
RECA2R
RECA3R
RECA1L
RECA2L
RECA3L
RECB1L
LAIN
RAIN
CAIN
LSAIN
RSAIN
LBAIN
RBAIN
SWAIN
RECB2L
RECB2R
s
PACKAGE OUTLINE
NJW1157FC2
±4.5 to ±7.5V
Gain : 0/-3/-6/-9/-12dB
Gain : 0/+3/+6/+9/+12/+15/+18dB
0 to -100dB/1dBstep, MUTE
0 to ±10dB/1dBstep
QFP100 – C2
Multi-Channel Input A
2 Channel Input
Supply
Voltage
µCOM
Interface
DCLA1 DCLA2
Volume
L1IN
R1IN
L2IN
R2IN
L3IN
R3IN
L4IN
R4IN
L5IN
R5IN
L6IN
R6IN
L7IN
R7IN
L8IN
R8IN
L9IN
R9IN
L10IN
R10IN
L11IN
R11IN
L12IN
SWBIN
RBBIN
LBBIN
RBBIN
LSBIN
CBIN
RBIN
LBIN
FR-
FR+
FL-
FL+
FIL1_R
FIL2_R
FIL3_R
FIL4_R
FIL1_L
FIL2_L
FIL3_L
FIL4_L
R12IN
Amp
Gain
Att Gain
Att Gain
DCRA1 DCRA2
TONE
Multi-channel
TONE
V+
GND
V-
LATCH
DATA
CLOCK
LOUT
SW
TSW
SW
ROUT
COUT
LSOUT
RSOUT
LBOUT
RBOUT
BSW
SSW
SWOUT
Input Selector
REC Out Selector
Multi-Channel Input B
–1–
NJW1157
s
PIN FUNCTION
81
80
51
50
100
1
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
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
SYMBOL
LOUT
ROUT
COUT
LSOUT
RSOUT
LBOUT
RBOUT
SWOUT
DC_L1
DC_L2
FIL_BL
FIL_TL
DC_R1
DC_R2
FIL_BR
FIL_TR
N.C.
N.C.
V+
V-
REC_A1L
REC_A1R
REC_A2L
REC_A2R
REC_A3L
REC_A3R
REC_B1L
REC_B1R
REC_B2L
REC_B2R
DCCAP_L
DCCAP_R
DCCAP_C
GND
GND
DCCAP_LS
DCCAP_RS
DCCAP_LB
DCCAP_RB
DCCAP_SW
DCL_OUT
DCL_IN
DCR_OUT
DCR_IN
FL+
FL-
FR+
FR-
VDDOUT
VSSOUT
FUNCTION
Lch output
Rch output
Cch output
LSch output
RSch output
LBch output
RBch output
SWch output
Lch Bass filter DC cut capacitor output terminal
Lch Bass filter DC cut capacitor input terminal
Lch Bass filter terminal
Lch Treble filter terminal
Rch Bass filter DC cut capacitor output terminal
Rch Bass filter DC cut capacitor input terminal
Rch Bass filter terminal
Rch Treble filter terminal
No Connect
No Connect
+ Power supply voltage input
- Power supply voltage input
“Input selector” Lch REC output A1
“Input selector” Rch REC output A1
“Input selector” Lch REC output A2
“Input selector” Rch REC output A2
“Input selector” Lch REC output A3
“Input selector” Rch REC output A3
“Input selector” Lch REC output B1
“Input selector” Rch REC output B1
“Input selector” Lch REC output B2
“Input selector” Rch REC output B2
Switching noise rejection capacitor
Switching noise rejection capacitor
Switching noise rejection capacitor
Ground
Ground
Switching noise rejection capacitor
Switching noise rejection capacitor
Switching noise rejection capacitor
Switching noise rejection capacitor
Switching noise rejection capacitor
“Input selector” Lch output
“Multi-channel selector” Lch input
“Input selector” Rch output
“Multi-channel selector” Rch input
“Input selector gain control” Lch no-inverted output
31
30
No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
SYMBOL
L1IN
R1IN
L2IN
R2IN
L3IN
R3IN
L4IN
R4IN
L5IN
R5IN
L6IN
R6IN
L7IN
R7IN
L8IN
R8IN
L9IN
R9IN
L10IN
R10IN
L11IN
R11IN
L12IN
R12IN
N.C.
DGND
DATA
CLOCK
LATCH
LAIN
RAIN
CAIN
LSAIN
RSAIN
LBAIN
RBAIN
SWAIN
LBIN
RBIN
CBIN
LSBIN
RSBIN
LBBIN
RBBIN
SWBIN
GND
GND
VSSOUT2
VDDOUT2
TCCAP
FUNCTION
“Input selector” Lch input 1
“Input selector” Rch input 1
“Input selector” Lch input 2
“Input selector” Rch input 2
“Input selector” Lch input 3
“Input selector” Rch input 3
“Input selector” Lch input 4
“Input selector” Rch input 4
“Input selector” Lch input 5
“Input selector” Rch input 5
“Input selector” Lch input 6
“Input selector” Rch input 6
“Input selector” Lch input 7
“Input selector” Rch input 7
“Input selector” Lch input 8
“Input selector” Rch input 8
“Input selector” Lch input 9
“Input selector” Rch input 9
“Input selector” Lch input 10
“Input selector” Rch input 10
“Input selector” Lch input 11
“Input selector” Rch input 11
“Input selector” Lch input 12
“Input selector” Rch input 12
No Connect
Digital Ground
Control data signal input
Clock signal input
Latch signal input
Multi-channel Lch input A
Multi-channel Rch input A
Multi-channel Cch input A
Multi-channel LSch input A
Multi-channel RSch input A
Multi-channel LBch input A
Multi-channel RBch input A
Multi-channel SWch input A
Multi-channel Lch input B
Multi-channel Rch input B
Multi-channel Cch input B
Multi-channel LSch input B
Multi-channel RSch input B
Multi-channel LBch input B
Multi-channel RBch input B
Multi-channel SWch input B
Ground
Ground
Internal Digital -Power Supply Output 2
Internal Digital +Power Supply Output 2
Switching noise rejection capacitor
“Input selector gain control” Lch inverted output
“Input selector gain control” Rch no-inverted output
“Input selector gain control” Rch inverted output
Internal Digital +Power Supply Output
Internal Digital -Power Supply Output
–2–
NJW1157
s
ABSOLUTE MAXIMUM RATING (Ta=25°C)
°
PARAMETER
SYMBOL
Power Supply Voltage
Maximum Input Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
V
+
/V
-
V
IM
P
D
Topr
Tstg
RATING
+7.5/-7.5
V
+
/V
-
1300
(* On board)
-40 to +85
-40 to +125
UNIT
V
V
mW
°C
°C
s
ELECTRICAL CHARACTERISTICS
(Ta=25°C,V
+
/V
-
=±7V)
°
±
PARAMETER
SYMBOL
TEST CONDITION
x
Power Supply
Operating Voltage 1
Operating Voltage 2
Supply Current 1
Supply Current 2
V+
V
-
I
CC
I
EE
No signal (V+)
No signal (V-)
-
-
MIN.
TYP.
MAX.
UNIT
4.5
-7.5
-
-
7.0
-7.0
25
25
7.5
-4.5
43
43
V
V
mA
mA
x
Input/Output Characteristics (Output : 1 to 8pin)
Maximum Output Voltage
Voltage Gain
Voltage Gain Error
Maximum Attenuation
Attenuation Error
Output Noise
Total Harmonic Distortion
Channel Separation
V
OM
G
V
∆G
V
A
TT
∆A
TT
V
NO
T.H.D.
CS
f=1kHz,THD=1%
Volume=0dB
V
IN
=1Vrms, f=1kHz
Volume=0dB
V
IN
=1Vrms, f=1kHz
Volume=0dB
f=1kHz, V
IN
=1Vrms
Volume=Mute
f=1kHz, V
IN
=1Vrms
Volume=-60dB
Volume=0dB,
Rg=0,A-weight
f=1kHz,Vo=1Vrms,
Volume=0dB
f=1kHz,Vo=1Vrms,A-weight
Volume=0dB
V
IN
=1Vrms, f=1kHz
f=1kHz,Vo=1Vrms,
3.0
-0.5
-0.5
-
-1
-
-
-
4.0
0
0
-110
0
-110
(3.2µ)
0.005
-100
-
0.5
0.5
-
1
-100
(10µ)
0.05
-90
Vrms
dB
dB
dB
dB
dBV
(Vrms)
%
dB
x
Input/Output Characteristics
(REC output : 21 to 30pin)
REC Out Voltage Gain
REC Out
Total Harmonic Distortion
Input Selector Gain Control
Voltage Gain 1
Input Selector Gain Control
Voltage Gain 2
Input Selector Gain Control
Voltage Gain 3
G
VREC
T.H.D.
REC
-0.5
-
0
0.005
0.5
0.05
dB
%
x
Input Selector Gain Control Characteristics
G
VINC1
G
VINC2
G
VINC3
Input Selector Gain = 0dB
Input Selector Gain = -6dB
Input Selector Gain = -12dB
-0.5
-6.5
-12.5
0
-6.0
-12.0
+0.5
-5.5
-11.5
dB
dB
dB
–3–
模拟与混合信号
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
