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參數(shù)資料
| 型號(hào)： | LMC6584BIN |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Low Voltage, Rail-To-Rail Input and Output CMOS Operational Amplifier |
| 中文描述： | QUAD OP-AMP, 3000 uV OFFSET-MAX, 1.2 MHz BAND WIDTH, PDIP14 |
| 封裝： | PLASTIC, DIP-14 |
| 文件頁(yè)數(shù)： | 15/19頁(yè) |
| 文件大?。?/td> | 678K |
| 代理商： | LMC6584BIN |
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Oscillators
(Continued)
→
t
1
= 0.27 seconds
and
→
t
2
= 0.74 seconds
Then,
z
1 Hz
LMC6582/4 as a Comparator
Figure 20shows the application of the LMC6582/4 as a com-
parator. The hysteresis is determined by the ratio of the two
resistors. Since the supply current of the LMC6582/4 is less
than 1 mA per amplifier, it can be used as a low power com-
parator, in applications where the quiescent current is an im-
portant parameter.
Typical propagation delays
@
V
S
= 3V would be on the order
of t
PHL
= 6 μs, and t
PLH
= 5 μs.
Filters
The filter shown in Figure 21is used to process “voice-band”
signals. The bandpass filter has a flatband gain of 40 dB.
The two corner frequencies, f
1
and f
2
, are calculated as:
The LMC6582/4, with its rail-to-rail input common mode volt-
age range and high gain (120 dB typical, R
= 10 k
) is ex-
tremely well suited for such filter applications. The rail-to-rail
input range allows for large input signals to be processed
without distortion. The high gain means that the circuit can
provide filtering and gain in one stage, instead of the typical
two stage filter. This implies a reduction in cost, and a sav-
ings of space and power.
This is an illustration of a conceptual use of the LMC6582/4.
The selectivity of the filter can be improved by increasing the
order (number of poles) of the design.
Sample-and-Hold Circuits
When the “switch” is closed during the sample interval,
C
charges up to the value of the input signal. When the
“switch” is open, C
retains this value as it is buffered by
the high input impedance of the LMC6582/4.
Errors in the “hold” voltage are caused by the input current of
the amplifier, the leakage current of the CD4066, and the
leakage current of the capacitor. While an input current of 80
fAminimizes the accumulation rate for error in the circuit, the
LMC6582/4’s CMRR of 82 dB allows excellent accuracy
throughout the amplifier’s rail-to-rail dynamic capture range.
Battery Monitoring Circuit
DS012041-28
FIGURE 20. Comparator with Hysteresis
DS012041-29
FIGURE 21. Wide-Band Band-Pass Filter
DS012041-31
FIGURE 22. Sample-and-Hold Application
DS012041-33
FIGURE 23. Circuit Used to Sense Charging.
www.national.com
15
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| LMC6584BIMX | Low Voltage, Rail-To-Rail Input and Output CMOS Operational Amplifier |
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| LMC6584AIN | Low Voltage, Rail-To-Rail Input and Output CMOS Operational Amplifier |
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