LM2901MEP [NSC]
Low Power Low Offset Voltage Quad Comparators; 低功耗低失调电压QUAD比较仪
| 型号： | LM2901MEP |
| 厂家： | 
National Semiconductor |
| 描述： | Low Power Low Offset Voltage Quad Comparators |
| 文件： | 总17页 (文件大小：742K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
January 2005
LM2901EP
Low Power Low Offset Voltage Quad Comparators
General Description
Features
n Wide supply voltage range
n LM2901:
The LM2901EP consists of four independent precision volt-
age comparators with an offset voltage specification as low
as 2 mV max for all four comparators. These were designed
specifically to operate from a single power supply over a
wide range of voltages. Operation from split power supplies
is also possible and the low power supply current drain is
independent of the magnitude of the power supply voltage.
This comparator also has a unique characteristic in that the
input common-mode voltage range includes ground, even
though operated from a single power supply voltage.
2 to 36 VDC or 1 to 18 VDC
n Very low supply current drain (0.8 mA) — independent
of supply voltage
n Low input biasing current:
n Low input offset current:
25 nA
5 nA
3 mV
n Offset voltage:
n Input common-mode voltage range includes GND
n Differential input voltage range equal to the power
supply voltage
n Low output saturation voltage:
n Output voltage compatible with TTL, DTL, ECL, MOS
Application areas include limit comparators, simple analog to
digital converters; pulse, squarewave and time delay gen-
erators; wide range VCO; MOS clock timers; multivibrators
and high voltage digital logic gates. The LM2901EP was
designed to directly interface with TTL and CMOS. When
250 mV at 4 mA
and CMOS logic systems
operated from both plus and minus power supplies, it will Advantages
directly interface with MOS logic— where the low power
drain of the LM2901EP is a distinct advantage over standard
comparators.
n High precision comparator
n Reduced VOS drift over temperature
n Eliminates need for dual supplies
n Allows sensing near GND
ENHANCED PLASTIC
•
•
•
•
•
•
Extended Temperature Performance of −40˚C to +85˚C
Baseline Control - Single Fab & Assembly Site
Process Change Notification (PCN)
n Compatible with all forms of logic
n Power drain suitable for battery operation
Applications
Qualification & Reliability Data
n Selected Military Applications
n Selected Avionics Applications
Solder (PbSn) Lead Finish is standard
Enhanced Diminishing Manufacturing Sources (DMS)
Support
Ordering Information
PART NUMBER
LM2901MEP
(Notes 1, 2)
VID PART NUMBER
V62/04743-01
TBD
NS PACKAGE NUMBER (Note 3)
M14A
TBD
Note 1: For the following (Enhanced Plastic) version, check for availability: - LM2901MXEP, LM2901NEP. Parts listed with an "X" are provided in Tape
& Reel and parts without an "X" are in Rails.
Note 2: FOR ADDITIONAL ORDERING AND PRODUCT INFORMATION, PLEASE VISIT THE ENHANCED PLASTIC WEB SITE AT: www.national.com/
mil
Note 3: Refer to package details under Physical Dimensions
© 2005 National Semiconductor Corporation
DS201139
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One-Shot Multivibrator with Input
Lock Out
20113912
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2
Absolute Maximum Ratings (Note 4)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage, V+
36 VDC or 18 VDC
36 VDC
Differential Input Voltage (Note 12)
Input Voltage
−0.3 VDC to +36 VDC
<
Input Current (VIN −0.3 VDC),
(Note 7)
50 mA
Power Dissipation (Note 5)
Molded DIP
1050 mW
760 mW
Small Outline Package
Output Short-Circuit to GND,
(Note 6)
Continuous
Storage Temperature Range
Lead Temperature
−65˚C to +150˚C
(Soldering, 10 seconds)
Operating Temperature Range
LM2901
260˚C
−40˚C to +85˚C
Soldering Information
Dual-In-Line Package
Soldering (10 seconds)
Small Outline Package
Vapor Phase (60 seconds)
Infrared (15 seconds)
ESD rating (1.5 kΩ in series with 100 pF)
260˚C
215˚C
220˚C
600V
Electrical Characteristics (Note 14)
(V+ = 5 VDC, TA = 25˚C, unless otherwise stated)
Parameter
Conditions
LM2901
Typ
Units
Min
Max
7.0
Input Offset Voltage
Input Bias Current
(Note 13)
2.0
25
mVDC
nADC
IIN(+) or IIN(−) with Output in
Linear Range, (Note 9), VCM=0V
250
Input Offset Current
Input Common-Mode
Voltage Range
I
IN(+)−IIN(−), VCM = 0V
5
50
V+−1.5
nADC
VDC
V+ = 30 VDC
0
(Note 10)
∞
∞
Supply Current
RL
RL
=
=
on all Comparators,
0.8
1.0
2.0
2.5
mADC
mADC
V/mV
+
, V = 36V,
Voltage Gain
RL ≥ 15 kΩ, V+ = 15 VDC
25
100
VO = 1 VDC to 11 VDC
Large Signal
VIN = TTL Logic Swing, VREF
=
300
ns
Response Time
1.4 VDC, VRL = 5 VDC,
RL = 5.1 kΩ,
Response Time
VRL = 5 VDC, RL = 5.1 kΩ,
1.3
16
µs
(Note 11)
Output Sink Current
Saturation Voltage
V
IN(−)= 1 VDC, VIN(+) = 0,
6.0
mADC
mVDC
nADC
VO ≤ 1.5 VDC
VIN(−) = 1 VDC, VIN(+) = 0,
ISINK ≤ 4 mA
250
0.1
400
Output Leakage
Current
VIN(+) = 1 VDC,VIN(−) = 0,
VO = 5 VDC
3
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Electrical Characteristics (Note 14)
(V+ = 5.0 VDC) (Note 8)
Parameter
Conditions
LM2901
Typ
9
Units
Min
Max
15
Input Offset Voltage
Input Offset Current
Input Bias Current
(Note 13)
mVDC
nADC
nADC
IIN(+)−IIN(−), VCM = 0V
IIN(+) or IIN(−) with Output in
Linear Range, VCM = 0V (Note 9)
V+ = 30 VDC
50
200
500
200
Input Common-Mode
Voltage Range
0
V+−2.0
700
1.0
VDC
mVDC
µADC
VDC
(Note 10)
Saturation Voltage
VIN(−) = 1 VDC, VIN(+) = 0,
ISINK ≤ 4 mA
400
Output Leakage Current
Differential Input Voltage
VIN(+) = 1 VDC, VIN(−) = 0,
VO = 30 VDC
Keep all VIN’s ≥ 0 VDC (or V−,
if used), (Note 12)
36
Note 4: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
Note 5: For operating at high temperatures, the LM2901EP must be derated based on a 125˚C maximum junction temperature and a thermal resistance of 95˚C/W
which applies for the device soldered in a printed circuit board, operating in a still air ambient. The low bias dissipation and the “ON-OFF” characteristic of the outputs
keeps the chip dissipation very small (P ≤100 mW), provided the output transistors are allowed to saturate.
D
+
Note 6: Short circuits from the output to V can cause excessive heating and eventual destruction. When considering short circuits to ground, the maximum output
+
current is approximately 20 mA independent of the magnitude of V .
Note 7: This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP
transistors becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action
+
on the IC chip. This transistor action can cause the output voltages of the comparators to go to the V voltage level (or to ground for a large overdrive) for the time
duration that an input is driven negative. This is not destructive and normal output states will re-establish when the input voltage, which was negative, again returns
to a value greater than −0.3 V
(at 25˚)C.
DC
Note 8: These specifications are limited to −40˚C ≤ T ≤ +85˚C, for the LM2901EP.
A
Note 9: The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the output so
no loading change exists on the reference or input lines.
Note 10: The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3V. The upper end of the
+
+
common-mode voltage range is V −1.5V at 25˚C, but either or both inputs can go to +30 V
without damage independent of the magnitude of V .
DC
Note 11: The response time specified is a 100 mV input step with 5 mV overdrive. For larger overdrive signals 300 ns can be obtained, see typical performance
characteristics section.
Note 12: Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the common-mode range, the
comparator will provide a proper output state. The low input voltage state must not be less than −0.3 V
(or 0.3 V below the magnitude of the negative power
DC
DC
supply, if used) (at 25˚C).
+
+
Note 13: At output switch point, V .1.4 V , R = 0Ω with V from 5 V to 30 V ; and over the full input common-mode range (0 V to V −1.5 V ), at 25˚C.
O
DC
S
DC
DC
DC
DC
Note 14: "Testing and other quality control techniques are used to the extent deemed necessary to ensure product performance over the specified temperature
range. Product may not necessarily be tested across the full temperature range and all parameters may not necessarily be tested. In the absence of specific
PARAMETRIC testing, product performance is assured by characterization and/or design."
Note 15: The LM139 within this data sheet’s graphics is referenced because of it’s a similarity to the LM2901, however is not offered in this data sheet.
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4
Typical Performance Characteristics
Supply Current
Input Current
20113940
20113939
Response Time for Various Input Overdrives
—Negative Transition
Output Saturation Voltage
20113941
20113942
Response Time for Various Input Overdrives
—Positive Transition
20113943
5
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Application Hints
The LM2901EP is a high gain, wide bandwidth device 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 changes
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 this input resistors to
The differential input voltage may be larger than V+ without
damaging the device. Protection should be provided to pre-
vent the input voltages from going negative more than −0.3
VDC (at 25˚C). An input clamp diode can be used as shown
in the applications section.
The output of the LM2901EP 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 LM2901EP 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 indepen-
dent of V+) and the β of this device. When the maximum
current limit is reached (approximately 16 mA), the output
transistor will come out of saturation and the output voltage
will rise very rapidly. The output saturation voltage is limited
by the approximately 60Ω RSAT of the output transistor. The
low offset voltage of the output transistor (1 mV) allows the
output to clamp essentially to ground level for small load
currents.
<
10 kΩ reduces the feedback signal levels and finally,
adding even a small amount (1 to 10 mV) of positive feed-
back (hysteresis) causes such a rapid transition that oscilla-
tions due to stray feedback are not possible. Simply socket-
ing 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 pins of any unused comparators should be tied to the
negative supply.
The bias network of the LM2901EP series establishes a
drain current which is independent of the magnitude of the
power supply voltage over the range of from 2 VDC to 30
VDC
.
It is usually unnecessary to use a bypass capacitor across
the power supply line.
Typical Applications (V+ = 5.0 VDC) (Note 15)
Basic Comparator
Driving CMOS
Driving TTL
20113903
20113905
20113904
OR Gate
AND Gate
20113908
20113909
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6
Typical Applications (V+= 15 VDC) (Note 15)
One-Shot Multivibrator
20113910
Bi-Stable Multivibrator
20113911
7
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Typical Applications (V+= 15 VDC) (Note 15) (Continued)
One-Shot Multivibrator with Input Lock Out
20113912
Pulse Generator
20113917
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8
Typical Applications (V+= 15 VDC) (Note 15) (Continued)
Large Fan-In AND Gate
ORing the Outputs
20113913
20113915
9
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Typical Applications (V+= 15 VDC) (Note 15) (Continued)
Time Delay Generator
20113914
Non-Inverting Comparator with Hysteresis
Inverting Comparator with Hysteresis
20113918
20113919
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Typical Applications (V+= 15 VDC) (Note 15) (Continued)
Squarewave Oscillator
Basic Comparator
20113921
20113916
Output Strobing
Limit Comparator
20113922
* Or open-collector logic gate without pull-up resistor
Crystal Controlled Oscillator
20113924
Comparing Input Voltages
of Opposite Polarity
20113920
20113925
11
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12
Typical Applications (V+= 15 VDC) (Note 15) (Continued)
Transducer Amplifier
Zero Crossing Detector (Single Power Supply)
20113930
20113928
Split-Supply Applications (V+ = +15 VDC and V− = −15 VDC
)
MOS Clock Driver
20113931
13
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Split-Supply Applications (V+ = +15 VDC and V− = −15 VDC) (Continued)
Zero Crossing Detector
Comparator With a Negative Reference
20113932
20113933
Schematic Diagram
20113901
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14
Connection Diagrams
Dual-In-Line Package
20113902
See NS Package Number M14A and N14A
15
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Physical Dimensions inches (millimeters)
unless otherwise noted
S.O. Package (M)
NS Package Number M14A
Molded Dual-In-Line Package (N)
NS Package Number N14A
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16
Notes
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
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