LMC1982 National Semiconductor, LMC1982 Datasheet - Page 3

• Manufacturer Part Number: LMC1982
• Description: Digitally-Controlled Stereo Tone and Volume Circuit with Two Selectable Stereo Inputs
• Manufacturer: National Semiconductor

Symbol
PSSR
f
V
V
V
V
CLK
The following specifications apply for V
0 dB, treble = 0 dB, enhanced stereo is off, and loudness is off unlessotherwise specified. All limits apply for T
Electrical Characteristics
IN(1)
IN(0)
OUT(1)
OUT(0)
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the deivce may occur. Operating Ratings indicate conditions for which the device is func-
tional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed speci-
fications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.
Note 2: All voltages are specified with respect to ground.
Note 3: When the input voltage (V
limited to 5 mA or less. The 20 mA package input current limits the number of pins that can exceed the power supply voltages with 5 mA current limit to four.
Channel-to-Channel Volume
Tracking Error
Mute Attenuation
Bass Gain Range
Bass Tracking Error
Bass Step Size
Treble Gain Range
Treble Tracking Error
Treble Step Size
Enhanced Stereo Cross
Coupling
Frequency Response
Loudness
Signal-to-Noise Ratio
Channel Balance
Channel Separation
Input-Input Isolation
Power Supply Rejection Ratio
Clock Frequency
Logic “1” Input Voltage
Logic “0” Input Voltage
Logic “1” Output Voltage
Logic “0” Output Voltage
Parameter
IN
) at any pin exceeds the power supply voltages (V
+
= 9V, f
(Continued)
All Volume Attenuation Settings
from 0100010XXX101XXX (80 dB)
to 0100010XXX000000 (0 dB)
V
f
f
f
(Relative to Previous Level)
f
f
f
(Relative to Previous Level)
(Note 10)
V
f
(Relative to Signal Amplitude at 1 kHz)
Volume Attenuator = 40 dB, Loudness
on (See Figure 5 )
Gain at 100 Hz (Referenced
Gain at 10 kHz (Referenced
V
Measured at 1 kHz, R
All Volume Settings
Input Pins 4, 25: Output Pins 13, 16;
V
470
V
Sinewave Applied to Pin 26
Pins 1, 27, 28 (IM Bus)
Pins 2, 3
Pins 1, 27, 28 (IM Bus)
Pins 2, 3
Pin 28 (IM Bus)
Pin 28 (IM Bus)
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
+
to Gain at 1 kHz)
to Gain at 1 kHz)
= 100 Hz, Pins 13, 16
= 100 Hz, Pins 13, 16
= 100 Hz, Pins 13, 16
= 10 kHz, Pins 13, 16
= 10 kHz, Pins 13, 16
= 10 kHz, Pins 13, 16
= 20 Hz − 20 kHz
= 9 V
IN
= 1.0 V
Applied to Input 1 and Input 2;
= 1.0 V
= 1.0V
to AC Ground on Unused Input
= 1 kHz, input signal (300 mV) applied to INPUT 1, volume = 0 dB, bass =
DC
rms
rms
rms
; 200 mV
, A Weighted,
(Note 8)
Conditions
3
rms
S
, 100 Hz
= 470
IN
<
V
−
or V
IN
>
V
+
) the absolute value of the current at that pin should be
(Note 6)
Typical
±
±
±
−4.4
±
11.5
±
±
105
2.0
2.0
6.5
0.2
5.0
1.3
2.9
0.4
1.2
0.4
95
80
95
32
0.1
0.1
0.1
0.1
12
12
(Note 7)
±
±
±
±
Limit
±
±
±
−2.5
−6.9
±
13.5
1.5
2.5
1.5
2.5
9.5
8.5
4.5
1.0
1.0
2.0
5.5
0.8
3.5
2.0
0.8
10.0
14.0
10.0
14.0
86
90
60
60
28
1.5
1.5
1.5
1.0
A
= T
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J
= +25˚C.
dB (max)
dB (max)
dB (max)
dB (max)
dB (max)
dB (max)
dB (max)
dB (max)
dB (max)
dB (max)
dB (max)
dB (max)
dB (min)
dB (min)
dB (min)
dB (min)
dB (min)
dB (min)
dB (min)
dB (min)
dB (min)
dB (min)
dB (min)
dB (min)
V (max)
V (max)
V (max)
V (min)
V (min)
V (min)
(Limit)
(max)
Unit
MHz