NTE1803
Integrated Circuit
Stereo Audio Control
Description:
The NTE1803 is an linear integrated circuit in a 18Lead DIP type package designed as an active
stereo tone/volume control for car radios, TV receivers, and audio equipment. It includes functions
for bass and treble control, volume control with builtin contour (can be switched off), and balance.
All these functions can be controlled by DC voltages or by single linear potentiometers. The bass and
treble responses are defined by a single capacitor per control per channel.
Features:
D
Few External Components Necessary
D
Low Noise due to Internal Gain
D
Bass Emphasis can be Increased by a DoublePole LowPass Filter
D
Wide Power Supply Range
Applications:
D
HiFi Radio
D
Auto Radio
D
TV
D
Audio Systems
Absolute Maximum Ratings:
Supply Voltage (V
318
), V
CC
20V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Power Dissipation, P
TOT
1200mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
A
30
to +80
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Electrical Charactertistics:
(V
CC
= 12V, T
A
= +25
C, R
G
600
, R
L
4.7k
, C
L
200pF
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply (Pin3)
Supply Voltage (V
CC
)
V
318
7.5
16.5
V
Supply Current (I
C
)
I
3
V
CC
= 8.5V
19
27
36
mA
V
CC
= 12V
25
35
45
mA
V
CC
= 15V
30
43
56
mA
DC Input Levels (Pin4 and Pin15)
V
4, 1518
V
CC
= 8.5V
3.8
4.25
4.7
V
V
CC
= 12V
5.3
5.9
6.6
V
V
CC
= 15V
6.5
7.3
8.2
V
DC Output Levels (Pin8 and Pin11) un-
V
8, 1118
V
CC
= 8.5V
3.3
4.25
5.2
V
der all control voltage conditions
with DC feedback
V
CC
= 12V
4.6
6.0
7.4
V
with DC feedback
V
CC
= 15V
5.7
7.5
9.3
V
Pin17
Application with Internal Potentiometer
V
1718
V
CC
= 8.5V
3.5
3.75
4.0
V
Contour ON/OFF Switch (Control by I
17
)
I
17
Contour (Switch Open)
0.5
mA
Linear (Switch Open)
1.5
10
mA
Application without Internal Potentiometer
V
1718
V
CC
10.8V, voltage range
forced to Pin17(Contour
cannot be switched OFF)
4.5
V
CC
/2V
BE
V
DC Control Voltage Range for volume,
V
1, 9, 10, 16
V
1718
= 5V
1.0
4.25
V
bass, treble, and balance (Pin1,
Pin9, Pin10, and Pin16 respectively)
Using internal supply
0.25
3.8
V
Input Current of Control Inputs (Pin1,
Pin9, Pin10, and Pin16)
I
1, 9, 10, 16
5
A
AC Electrical Charactertistics: (V
CC
= V
318
= 12V, T
A
= +25
C, contour switch closed (linear posi
tion), volume, balance, bass, and treble controls in midposition, R
G
600
, R
L
4.7k
, C
L
200pF,
f = 1kHz unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Control Range
Maximum Gain of Volume
A
V
max
20.5
21.5
23
dB
Volume Control Range
A
V
A
V
max/A
V
min
90
100
dB
Balance Control Range
A
V
A
V
= 0dB
40
dB
Bass Control Range at 40Hz
A
V
12
15
dB
Treble Control Range at 16kHz
A
V
12
15
dB
Signal Inputs, Outputs
Input Resistance (Pin4 and Pin15)
R
14,15
A
V
= 20dB, Note 1
10
k
A
V
= 40dB, Note 1
160
k
Output Resistance (Pin8 and Pin11)
R
O8,11
300
Note 1. Equation for input resistance:
R
I
=
160k
1 + A
V
; A
V
max = 12.
AC Electrical Charactertistics (Cont'd): (V
CC
= V
318
= 12V, T
A
= +25
C, contour switch closed
(linear position), volume, balance, bass, and treble controls in midposition, R
G
600
, R
L
4.7k
,
C
L
200pF, f = 1kHz unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Signal Processing
Power Supply Ripple Rejection
PSRR
V
CC(RMS)
200mV, f = 100Hz,
A
V
= 0dB
35
50
dB
Channel Separation (250Hz to 10kHz)
CS
A
V
= 20dB to +21.5dB
46
60
dB
Spread of Volume Contol with Constant
Control Voltage
A
V
V
118
= 0.5V
1718
3
dB
Gain Tolerance Between Left and Right
Channel
A
V, LR
V
1618
= V
118
= 0.5V
1718
1.5
dB
Tracking Between Channels
A
V
A
V
= 21.5dB to 26dB,
f = 250Hz to 6.3kHz,
balance adjusted at A
V
= 10dB
2.5
dB
Signal Handling with DC Feedback
Input Signal Handling
V
I(RMS)
V
CC
= 8.5V, THD = 0.5%,
f = 1kHz (RMS Value)
1.4
V
V
CC
= 8.5V, THD = 0.7%,
f = 1kHz (RMS Value)
1.8
2.4
V
V
CC
= 12V, THD = 0.5%,
f = 40Hz to 16kHz (RMS Value)
1.4
V
V
CC
= 12V, THD = 0.7%,
f = 40Hz to 16kHz (RMS Value)
2.0
3.2
V
V
CC
= 15V, THD = 0.5%,
f = 40Hz to 16kHz (RMS Value)
1.4
V
V
CC
= 15V, THD = 0.7%,
f = 40Hz to 16kHz (RMS Value)
2.0
3.2
V
Output Signal Handling (Note 2, Note 3)
V
O(RMS)
V
CC
= 8.5V, THD = 0.5%,
f = 1kHz (RMS Value)
1.8
2.0
V
V
CC
= 8.5V, THD = 10%,
f = 1kHz (RMS Value)
2.2
V
V
CC
= 12V, THD = 0.5%,
f = 40Hz to 16kHz (RMS Value)
2.5
3.0
V
V
CC
= 15V, THD = 0.5%,
f = 40Hz to 16kHz (RMS Value)
3.5
V
Noise Performance (V
CC
= 8.5V)
Output Noise Voltage (Unweighted) at
V
NO(RMS)
for maximum voltage gain, Note 4
260
V
f = 20Hz to 20kHz (RMS value)
A
V
= 3dB, Not e 4
70
140
V
Output Noise Voltage (Weighted) CCIR
V
NO(M)
for maximum voltage gain, Note 4
890
V
recommendation 4682 (peak value)
for maximum emphasis of bass and
treble (contour OFF, A
V
= 40dB),
Note 4
360
V
Note 2. Frequencies below 200Hz and above 5kHz have reduced voltage swing. The reduction at
40Hz and at 16kHz is 30%.
Note 3. In the event of bass boosting the output signal handling is reduced. The reduction is 1dB
for maximum bass boost.
Note 4. Linear frequency response.
AC Electrical Charactertistics (Cont'd): (V
CC
= V
318
= 12V, T
A
= +25
C, contour switch closed
(linear position), volume, balance, bass, and treble controls in midposition, R
G
600
, R
L
4.7k
,
C
L
200pF, f = 1kHz unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Noise Performance (V
CC
= 12V)
Output Noise Voltage (Unweighted) at
V
NO(RMS)
for maximum voltage gain, Note 4
310
V
f = 20Hz to 20kHz (RMS value),
Note 5
A
V
= 16dB, Note 4
100
200
V
Output Noise Voltage (Weighted) CCIR
V
NO(M)
for maximum voltage gain, Note 4
940
V
recommendation 4682 (peak value)
for maximum emphasis of bass and
treble (contour OFF, A
V
= 40dB)
400
V
Noise Performance (V
CC
= 15V)
Output Noise Voltage (Unweighted) at
V
NO(RMS)
for maximum voltage gain, Note 4
350
V
f = 20Hz to 20kHz (RMS value),
Note 5
A
V
= 16dB, Note 4
110
220
V
Output Noise Voltage (Weighted) CCIR
V
NO(M)
for maximum voltage gain, Note 4
980
V
recommendation 4682 (peak value)
for maximum emphasis of bass and
treble (contour OFF, A
V
= 40dB)
420
V
Note 4. Linear frequency response.
Note 5. For peak values add 4.5dB to RMS values.
V
CC
Pin Connection Diagram
1
2
3
4
Volume Control
Bypass
Rt Ch Input
5
Rt Ch Bass Capacitor
6
Rt Ch Bass Capacitor
7
Rt Ch Treble Capacitor
18
17
16
15
GND
Reference Control Voltage
Balance Control
Lt Ch Input
14
Lt Ch Bass Capacitor
13
Lt Ch Bass Capacitor
12
Lt Ch Treble Capacitor
8
Rt Ch Output
11
Lt Ch Output
9
Bass Control
10
Treble Control
1
9
18
10
.870 (22.1) Max
.800 (20.3)
.100 (2.54)
.125 (3.17) Min
.250
(6.35)
.150
(3.8)
PDF 
ZIP