LM1036N/NOPB National Semiconductor, LM1036N/NOPB Datasheet - Page 7

• Manufacturer Part Number: LM1036N/NOPB
• Description: IC TONE/VOL/BAL DUAL DC 20-DIP
• Manufacturer: National Semiconductor
• Type: Tone Volume/Balance Circuitr

Specifications of LM1036N/NOPB

• Applications: Automotive Systems, Players, TV
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• No. Of Channels: 2
• Supply Voltage Range: 9V To 16V
• Load Impedance: 20ohm
• Operating Temperature Range: 0°C To +70°C
• Amplifier Case Style: DIP
• No. Of Pins: 20
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM1036N; *LM1036N/NOPB; LM1036; LM1036N

FIGURE 4. Tone Characteristic (Gain vs Frequency)
FIGURE 5. Tone Characteristic (Gain vs Frequency)
FIGURE 6. Tone Characteristic (Gain vs Frequency)
FIGURE 7. Loudness Compensated Volume
Characteristic
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Figure 8 and Figure 9 illustrate the loudness characteristics
obtained with C
being kept at the nominal 0.01 μF. These values naturally
modify the bass tone response as in Figure 2 and Figure 3.
With pins 7 (loudness) and 12 (volume) directly connected,
loudness control starts at typically −8 dB volume, with most
of the control action complete by −30 dB.
Figure 10 and Figure 11 show the effect of resistively offset-
ting the voltage applied to pin 7 towards the control reference
voltage (pin 17). Because the control inputs are high
impedance, this is easily done and high value resistors may
be used for minimal additional loading. It is possible to reduce
the rate of onset of control to extend the active range to
−50 dB volume control and below.
The control on pin 7 may also be divided down towards
ground bringing the control action on earlier. This is illustrated
in Figure 12, With a suitable level shifting network between
pins 12 and 7, the onset of loudness control and its rate of
change may be readily modified.
FIGURE 8. Loudness Compensated Volume
FIGURE 9. Loudness Compensated Volume
b
changed to C
Characteristic
Characteristic
b
/2 and C
b
/4 respectively, C
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