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參數(shù)資料
| 型號(hào)： | LM193JAN |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Low Power Low Offset Voltage Dual Comparators |
| 中文描述： | 低功耗低失調(diào)電壓雙比較器 |
| 文件頁(yè)數(shù)： | 7/14頁(yè) |
| 文件大?。?/td> | 686K |
| 代理商： | LM193JAN |
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Application Hints
The LM193 series are high gain, wide bandwidth devices
which, like most comparators, can easily oscillate if the
output lead is inadvertently allowed to capacitively couple to
the inputs via stray capacitance. This shows up only during
the output voltage transition intervals as the comparator
change states. Power supply bypassing is not required to
solve this problem. Standard PC board layout is helpful as it
reduces stray input-output coupling. Reducing the input re-
sistors to
<
10 k
reduces the feedback signal levels and
finally, adding even a small amount (1.0 to 10 mV) of positive
feedback (hysteresis) causes such a rapid transition that
oscillations due to stray feedback are not possible. Simply
socketing the IC and attaching resistors to the pins will cause
input-output oscillations during the small transition intervals
unless hysteresis is used. If the input signal is a pulse
waveform, with relatively fast rise and fall times, hysteresis is
not required.
All input pins of any unused comparators should be tied to
the negative supply.
The bias network of the LM193 series establishes a drain
current which is independent of the magnitude of the power
supply voltage over the range of from 2.0 V
DC
to 30 V
DC
.
It is usually unnecessary to use a bypass capacitor across
the power supply line.
Typical Applications
The differential input voltage may be larger than V
+
without
damaging the device (Note 5). Protection should be provided
to prevent the input voltages from going negative more than
0.3 V
(at 25C). An input clamp diode can be used as
shown in the applications section.
The output of the LM193 series is the uncommitted collector
of a grounded-emitter NPN output transistor. Many collectors
can be tied together to provide an output OR’ing function. An
output pull-up resistor can be connected to any available
power supply voltage within the permitted supply voltage
range and there is no restriction on this voltage due to the
magnitude of the voltage which is applied to the V
+
terminal
of the LM193 package. The output can also be used as a
simple SPST switch to ground (when a pull-up resistor is not
used). The amount of current which the output device can
sink is limited by the drive available (which is independent of
V
+
) and the
β
of this device. When the maximum current limit
is reached (approximately 16mA), the output transistor will
come out of saturation and the output voltage will rise very
rapidly. The output saturation voltage is limited by the ap-
proximately 60
r
SAT
of the output transistor. The low offset
voltage of the output transistor (1.0mV) allows the output to
clamp essentially to ground level for small load currents.
(V
+
=5.0 V
DC
)
Basic Comparator
Driving CMOS
Driving TTL
20143235
20143236
20143237
Squarewave Oscillator
Pulse Generator
Crystal Controlled Oscillator
20143238
20143239
* For large ratios of R1/R2,
D1 can be omitted.
20143240
L
www.national.com
7
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM193W | LOW POWER DUAL VOLTAGE COMPARATORS |
| LM193WP | LOW POWER DUAL VOLTAGE COMPARATORS |
| LM293W | LOW POWER DUAL VOLTAGE COMPARATORS |
| LM293WD | LOW POWER DUAL VOLTAGE COMPARATORS |
| LM293WN | LOW POWER DUAL VOLTAGE COMPARATORS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM193JG | 制造商:Texas Instruments 功能描述:Comparator Dual ±18V/36V 8-Pin CDIP Tube 制造商:Texas Instruments 功能描述:COMPARATOR DUAL 18V/36V 8CDIP - Rail/Tube 制造商:Texas Instruments 功能描述:DUAL COMPARATOR 制造商:Texas Instruments 功能描述:IC COMPARATOR DUAL 制造商:Texas Instruments 功能描述:Dual Differential Comparator 2V/36V 制造商:Texas Instruments 功能描述:Comparator Dual 18V/36V 8-Pin CDIP |
| LM193JGB | 制造商:Texas Instruments 功能描述:Comparator Dual ±18V/36V 8-Pin CDIP Tube 制造商:Texas Instruments 功能描述:COMPARATOR DUAL 18V/36V 8CDIP - Rail/Tube |
| LM193L | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Analog Comparator |
| LM193LB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM193-LM293 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:LOWPOWER DUAL VOLTAGE COMPARATORS |
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