NJW1240
5Vrms Ground Referenced 6-Channel Line Amplifier
GENERAL DESCRIPTION
The
NJW1240
is a 6-channel audio line amplifier for High
Voltage Pre-out of Car AV system. It can swing
5Vrms(14.1V peak-to peak) singal at 8V opearating voltage
because of including the charge pump circuit.
Ground-referenced outputs eliminate output coupling
capacitor. The pop noise suppression circuit reduces a pop
noise at the power-on and power-off.
s
PACKAGE OUTLINE
NJW1240V
FEATURES
q
Operating Voltage
q
Operating Current
q
q
q
q
q
q
q
q
q
q
q
+6 to +10V
I
DD
=15mA typ.
+
at V =8V, R
L
=47kΩ, No Signal
5.0Vrms min.
0.0008% typ
-102dB typ.
Maximum Output Voltage
Low Distortion
Low Output Noise
Output Coupling Capacitor-less
External Synchronizing
Divide-by-2
Pop Noise Suppression Circuit
External Mute
Gain Select
+6dB/+8.3dB
RF Immunity OpAmp tolerant to FR noise. (ex. mobile phone)
Bi-CMOS Technology
Package Outline
SSOP32
BLOCK DIAGRAM
V
+
IN1
V
V
-
+
OUT1
Mute Tr
OUT2
V
V
-
+
IN2
Mute Tr
IN3
V
-
OUT3
Mute Tr
OUT4
V
-
V
+
V
+
IN4
Mute Tr
IN5
V
V
-
+
OUT5
Mute Tr
OUT6
V
-
IN6
Mute Tr
Pop Noise
Suppression
V
-
Gain
Select
Charge
Pump
V
+
Detector
Ver. 1.1E
–1–
NJW1240
PIN CONFIGURATION
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
IN1
IN2
IN3
IN4
IN5
IN6
MUTE
GAIN
-
V IN
-
V OUT
RegCNT
NC
NC
CLK
+
V Reg
NC
Function
Input 1
Input 2
Input 3
Input 4
Input 5
Input 6
MUTE / Pop Noise Suppression
Gain Select
V- Power Input
V- Power Output
V- Power Control
No Connect
No Connect
External Clock Input
V+ Power Supply for Regulator
No Connect
NJW1240
No.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Symbol
Function
NC
No Connect
FB
V- Power Supply External Setting
CP
Flying Capacitor Positive Terminal
NC
No Connect
NC
No Connect
GND
Ground
CN
Flying Capacitor Negative Terminal
MUTE_TC Pop Noise Suppression Capacitor
+
V A
V+ Power Supply for Analog
GND
Ground
Output 6
OUT6
Output 5
OUT5
Output 4
OUT4
Output 3
OUT3
OUT2
Output 2
OUT1
Output 1
–2–
NJW1240
ABSOLUTE MAXIMUM RATING
(Ta=25°C)
PARAMETER
Supply Voltage
CLK Terminal Voltage
V Power Supply Control Voltage
FB Terminal Voltager
Maximum Input Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
-
SYMBOL
V
+
RATING
10.5
-0.3½+6
-0.3½+6
(V OUT)+6
V +0.3
905
(Note1)
+
-
UNIT
V
V
V
V
V
mW
°C
°C
V
CLK
V
RegCNT
V
FB
V
IN
P
D
Topr
Tstg
-40 ~ +85
-40 ~ +125
(Note1) EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting
s
RECOMMENDED OPERATING CONDITIONS
(Ta=25°C unless otherwise specified)
PARAMETER
Operating Voltage
External Clock Input Range
(Note2)
External Clock Duty Input Range
SYMBOL
V
+
TEST CONDITION
MIN.
6
150
45
TYP.
8
-
-
MAX.
10
1250
80
UNIT
V
kHz
%
f
CLK
DUTY
(Note2) The regulator for V- power supply operates by the half of f
CLK
.
(Ta=25°C, V
+
=8V, f=1kHz, Vin=0dBV, R
L
=47kΩ, GAIN=Low, MUTE=High, RegCNT=High unless otherwise specified)
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
I
DD
G
V1
G
V2
V
OMAX
V
MUTE
V
NO
THD
CS
f
OSC
V
OS
TEST CONDITION
No signal
MIN.
-
5.5
TYP.
12
6.0
8.3
-
-100
-102
(7.94)
0.0008
-
300
-
MAX.
20
6.5
8.8
-
-80
-
-
-
-
8
UNIT
mA
dB
dB
Vrms
dB
dBV
(µV)
%
dB
kxHz
mV
Operating Current
Voltage Gain1
Voltage Gain2
Maximum Output Voltage
Mute Level
Output Noise Voltage
Total Harmonic Distortion
Channel Separation
Internal Oscillating Frequency
Output Offset Voltage
GAIN=High
THD=1%
MUTE=Low
Rg=0Ω , A=Weighted
BW:400Hz-22kHz
Rg=600Ω
f
CLK
=No signal
Rg=0Ω
7.8
5
-
-
-
80
-
-
(Ta=25°C, V
+
=8V, f=1kHz, Vin=0dBV, R
L
=47kΩ unless otherwise specified)
CONTROL CHARACTERISTICS
PARAMETER
SYMBOL
Mute
H
Mute
L
Gain
H
Gain
L
CLK
H
CLK
L
TEST CONDITION
MUTE OFF
MUTE ON
Gv=8.3dB
Gv=6dB
MIN.
2.3
0
2.3
0
2.3
0
TYP.
-
-
-
-
-
-
MAX.
V
+
UNIT
V
V
V
V
V
V
Mute Terminal High
Mute Terminal Low
Gain Terminal High
Gain Terminal Low
CLK Terminal High
CLK Terminal Low
0.7
V
+
0.7
5.5
0.7
–3–
NJW1240
TERMINAL DESCRIPTION
Terminal
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
V
+
A
V
+
A
V
+
A
VOLTAGE
1
2
3
4
5
6
IN1
IN2
IN3
IN4
IN5
IN6
INPUT1
INPUT2
INPUT3
INPUT4
INPUT5
INPUT6
10kΩ
0V
1pF
V
-
IN
50kΩ
V
-
IN
V
+
A
V
+
A
7
8
MUTE
GAIN
MUTE/Pop Noise
Suppression
Gain Select
20kΩ
0V
1pF
100kΩ
V
-
IN
Reg(5V)
500kΩ
100Ω
11
RegCNT
V- Power Control
500kΩ
0V
Reg(5V)
Reg(5V)
14
CLK
External Clock Input
100Ω
0V
1MΩ
Reg(5V)
18
FB
V- Power Supply
External Setting
100Ω
1kΩ
-
2pF
V
-
OUT
–4–
NJW1240
TERMINAL DESCRIPTION
Terminal
SYMBOL
FUNCTION
EQUIVALENT CIRCUIT
VOLTAGE
V
+
Reg
19
CP
Flying Capacitor
Positive Terminal
V
-
OUT
-
23
CN
Flying Capacitor
Negative Terminal
V
-
OUT
V
-
OUT
-
V
+
A
V
+
A
V
+
A
24
MUTE_TC
Pop Noise
Suppression
Capacitor
V
-
IN
100kΩ
50kΩ
1MΩ
0V
V
-
IN
V
-
IN
27
28
29
30
31
32
OUT6
OUT5
OUT4
OUT3
OUT2
OUT1
Output6
Output5
Output4
Output3
Output2
Output1
V
+
A
V
+
A
V
+
A
200Ω
0V
50Ω
200Ω
FB
V
-
IN
V
-
IN
V
-
IN
–5–
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
