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LM1036 Dual DC Operated Tone/Volume/Balance Circuit
February 25, 2008
LM1036
Dual DC Operated Tone/Volume/Balance Circuit
General Description
The LM1036 is a DC controlled tone (bass/treble), volume
and balance circuit for stereo applications in car radio, TV and
audio systems. An additional control input allows loudness
compensation to be simply effected.
Four control inputs provide control of the bass, treble, balance
and volume functions through application of DC voltages from
a remote control system or, alternatively, from four poten-
tiometers which may be biased from a zener regulated supply
provided on the circuit.
Each tone response is defined by a single capacitor chosen
to give the desired characteristic.
Features
■
■
■
■
■
■
Wide supply voltage range, 9V to 16V
Large volume control range, 75 dB typical
Tone control, ±15 dB typical
Channel separation, 75 dB typical
Low distortion, 0.06% typical for an input level of 0.3 Vrms
High signal to noise, 80 dB typical for an input level of 0.3
Vrms
■
Few external components required
Block and Connection Diagram
Dual-In-Line (DIP) and Small Outline (SO) Package
514201
Order Number LM1036N, LM1036M or LM1036MX
See NS Package Number N20A or M20B
© 2008 National Semiconductor Corporation
5142
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LM1036
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
Control Pin Voltage (Pins 4, 7, 9, 12, 14)
16V
V
CC
Operating Temperature Range
Storage Temperature Range
Power Dissipation
Lead Temp. (Soldering, 10 seconds)
0°C to +70°C
−65°C to +150°C
1W
260°C
Note 1:
“Absolute Maximum Ratings” indicate limits beyond which damage
to the device may occur. Operating Ratings indicate conditions for which the
device is functional, but do not guarantee specific performance limits.
Electrical Characteristics
V
CC
=12V, T
A
=25°C (unless otherwise stated)
Parameter
Supply Voltage Range
Supply Current
Zener Regulated Output
Voltage
Current
Maximum Output Voltage
Pin 17
5.4
5
Pins 8, 13; f=1 kHz
V
CC
=9V, Maximum Gain
V
CC
=12V
Maximum Input Voltage
Input Resistance
Output Resistance
Maximum Gain
Volume Control Range
Gain Tracking
Channel 1–Channel 2
Balance Control Range
Bass Control Range
(Note 3)
Treble Control Range
(Note 3)
Total Harmonic Distortion
Pins 2, 19; f=1 kHz, V
CC
2V
Gain=−10 dB
Pins 2, 19; f=1 kHz
Pins 8, 13; f=1 kHz
V(Pin 12)=V(Pin 17); f=1 kHz
f=1 kHz
f=1 kHz
0 dB through −40 dB
−40 dB through −60 dB
Pins 8, 13; f=1 kHz
f=40 Hz, C
b
=0.39 μF
V(Pin 14)=V(Pin 17)
V(Pin 14)=0V
f= 16 kHz, C
t
,=0.01 μF
V(Pin 4)=V(Pin 17)
V(Pin 4)=0V
f=1 kHz, V
IN
=0.3 Vrms
Gain=0 dB
Gain=−30 dB
Channel Separation
Signal/Noise Ratio
f=1 kHz, Maximum Gain
Unweighted 100 Hz–20 kHz
Maximum Gain, 0 dB=0.3 Vrms
CCIR/ARM (Note 4)
Gain=0 dB, V
IN
=0.3 Vrms
Gain=−20 dB, V
IN
=1.0 Vrms
Output Noise Voltage at
Minimum Gain
Supply Ripple Rejection
Control Input Currents
Frequency Response
200 mVrms, 1 kHz Ripple
Pins 4, 7, 9, 12, 14 (V=0V)
−1 dB (Flat Response
20 Hz–16 kHz)
35
50
−0.6
250
−2.5
dB
μA
kHz
CCIR/ARM (Note 4)
60
0.06
0.03
75
80
0.3
%
%
dB
dB
12
−12
15
−15
18
−18
dB
dB
12
−12
15
−15
18
−18
dB
dB
−2
70
20
30
20
0
75
1
2
1
−26
3
2
kΩ
Ω
dB
dB
dB
dB
dB
dB
0.8
1.3
0.8
1.0
1.6
V
mA
Vrms
Vrms
Vrms
Pin 11
Conditions
Min
9
35
Typ
Max
16
45
Units
V
mA
−20
75
79
72
10
16
dB
dB
μV
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2
LM1036
Note 2:
The maximum permissible input level is dependent on tone and volume settings. See Application Notes.
Note 3:
The tone control range is defined by capacitors C
b
and C
t
. See Application Notes.
Note 4:
Gaussian noise, measured over a period of 50 ms per channel, with a CCIR filter referenced to 2 kHz and an average-responding meter.
Typical Performance Characteristics
Volume Control
Characteristics
Balance Control
Characteristic
514220
514221
Tone Control Characteristic
Tone Characteristic (Gain
vs Frequency)
514222
514223
Tone Characteristic (Gain
vs Frequency)
Loudness Compensated
Volume Characteristic
514224
514225
3
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LM1036
Input Signal Handling vs
Supply Voltage
THD vs Gain
514227
514226
Channel Separation vs
Frequency
Loudness Control
Characteristic
514228
514229
Output Noise Voltage
vs Gain
THD vs Input Voltage
514231
514230
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