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參數(shù)資料
| 型號(hào)： | LMC1992CCN |
| 廠(chǎng)商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 音頻控制 |
| 英文描述： | LMC1992 Digitally-Controlled Stereo Tone and Volume Circuit with Four-Channel Input-Selector |
| 中文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁(yè)數(shù)： | 3/14頁(yè) |
| 文件大?。?/td> | 260K |
| 代理商： | LMC1992CCN |
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Electrical Characteristics
The following specifications apply for V
a
e
8V, f
IN
e
1 kHz, input signal applied to
channel 1, volume
e
0 dB, bass
e
0 dB, treble
e
0 dB, and faders
e
0 dB unless otherwise specified. All limits T
A
e
T
J
e
25
§
C. (Continued)
Symbol
Parameter
Conditions
Typical
(Note 6)
Limit
(Note 7)
Units
(Limit)
Bass Gain Range
f
IN
e
100 Hz, Pins 14, 16
g
12
g
10.0
dB (min)
Bass Tracking Error
f
IN
e
100 Hz, Pins 14, 16
g
0.1
g
1.0
dB (max)
Bass Step Size
f
IN
e
100 Hz, Pins 14, 16
(Relative to Previous Level)
2.0
1.0
3.0
dB (min)
dB (max)
Treble Gain Range
f
IN
e
10 kHz, Pins 14, 16
g
12
g
10.0
dB (min)
Treble Tracking Error
f
IN
e
10 kHz, Pins 14, 16
g
0.1
g
1.0
dB (max)
Treble Step Size
f
IN
e
10 kHz, Pins 14, 16
(Relative to Previous Level)
2.0
1.0
3.0
dB (min)
dB (max)
Frequency Response
b
3 dB
b
0.3 dB (Relative to Signal Amplitude at 1 kHz)
450
kHz
20
kHz (min)
Channel Separation
V
IN
e
1.0 V
rms
97
70
dB (min)
Input-Input Isolation
V
IN
e
1.0 V
rms
(Note 8)
V
a
e
8 V
DC
; 100 mV
P-P
,
100 Hz Sinewave Applied to Pin 28
90
70
dB (min)
PSRR
Power Supply Rejection Ratio
40
31
dB (min)
f
CLK
Clock Frequency
1.0
0.5
MHz (max)
V
IN(1)
Logic ‘‘1’’ Input Voltage
1.3
2.0
V (min)
V
IN(0)
Logic ‘‘0’’ Input Voltage
0.4
0.8
V (max)
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. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications 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
IN
) at any pin exceeds the power supply voltages (V
IN
k
V
b
or V
IN
l
V
a
) the absolute value of the current at that pin should be
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.
Note 4:
The maximum power dissipation must be de-rated at elevated temperatures and is dictated by T
JMAX
,
w
JA
, and the ambient temperature T
A
. The maximum
allowable power dissipation is PD
e
(T
JMAX
b
T
A
)/
i
JA
or the number given in the Absolute Maximum Ratings, whichever is lower. For the LMC1992CCN, T
JMAX
e
125
§
C, and the typical junction-to-ambient thermal resistance, when board mounted, is 67
§
C/W.
Note 5:
Human body model; 100 pF discharged through a 1.5 k
X
resistor.
Note 6:
Typicals are at T
J
e
25
§
C and represent the most likely parametric norm.
Note 7:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8:
The Input-Input Isolation is tested by driving one input and measuring the front outputs when the undriven inputs are selected.
Note 9:
The Volume Step Size is defined as the change in attenuation between any two adjacent volume attenuation settings. The nominal Volume Step Size is
2 dB.
Note 10:
The Fader Step Size is defined as the change in attenuation between any two adjacent fader attenuation settings. The nominal Volume Step Size is 2 dB.
3
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