NTE NTE1803 Datasheet
NTE1803
Integrated Circuit
Stereo Audio Control
Description:
The NTE1803 is an linear integrated circuit in a 18–Lead 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 built–in 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 Double–Pole Low–Pass Filter
D Wide Power Supply Range
Applications:
D Hi–Fi Radio
D Auto Radio
D TV
D Audio Systems
Absolute Maximum Ratings:
Supply Voltage (V
Total Power Dissipation, P
3–18
), V
CC
TOT
Operating Ambient Temperature Range, T
Storage Temperature Range, T
stg
20V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1200mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
–30° to +80°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Electrical Charactertistics: (VCC = 12V, TA = +25°C, RG ≤ 600Ω, RL ≤ 4.7kΩ, CL ≤ 200pF
unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Supply (Pin3)
Supply Voltage (VCC) V
Supply Current (IC) I
DC Input Levels (Pin4 and Pin15) V
DC Output Levels (Pin8 and Pin1 1) un-
4, 15–18VCC
V
8, 11–18
der all control voltage conditions
with DC feedback
with DC feedback
Pin17
Application with Internal Potentiometer V
Contour ON/OFF Switch ( Control by I17) –I
Application without Internal Potentiometer V
DC Control Voltage Range for volume, V
1, 9, 10, 16
bass, treble, and balance (Pin1,
Pin9, Pin10, and P in16 respectively)
3–18
3
17–18
17
17–18
7.5 – 16.5 V
VCC = 8.5V 19 27 36 mA
VCC = 12V 25 35 45 mA
VCC = 15V 30 43 56 mA
= 8.5V 3.8 4.25 4.7 V
VCC = 12V 5.3 5.9 6.6 V
VCC = 15V 6.5 7.3 8.2 V
VCC = 8.5V 3.3 4.25 5.2 V
VCC = 12V 4.6 6.0 7.4 V
VCC = 15V 5.7 7.5 9.3 V
VCC = 8.5V 3.5 3.75 4.0 V
Contour (Switch Open) – – 0.5 mA
Linear (Switch Open) 1.5 – 10 mA
VCC ≥ 10.8V, voltage range
4.5 – VCC/2–V
BE
V
forced to Pin17(Contour
cannot be switched OFF)
V
= 5V 1.0 – 4.25 V
17–18
Using internal supply 0.25 – 3.8 V
Input Current of Control Inputs (Pin1,
–I
1, 9, 10, 16
– – 5 µA
Pin9, Pin10, and Pin16)
AC Electrical Charactertistics: (VCC = V
tion), volume, balance, bass, and treble controls in mid–position, R
= 12V, TA = +25°C, contour switch closed (linear posi
3–18
≤ 600Ω, RL ≤ 4.7kΩ, CL ≤ 200pF,
G
f = 1kHz unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Control Range
Maximum Gain of Volume AVmax 20.5 21.5 23 dB
Volume Control Range ∆A
Balance Control Range ∆A
Bass Control Range at 40Hz ∆A
Treble Control Range at 16kHz ∆A
Signal Inputs, Outputs
Input Resistance (Pin4 and Pin15) R
Output Resistance (Pin8 and Pin11) R
14,15
O8,11
AVmax/AVmin 90 100 – dB
V
AV = 0dB – –40 – dB
V
V
V
±12 ±15 – dB
±12 ±15 – dB
AV = 20dB, Note 1 10 – – kΩ
AV = –40dB, Note 1 – 160 – kΩ
– – 300 Ω
Note 1. Equation for input resistance:
R
=
I
160kΩ
1 + A
; AVmax = 12.
V
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