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LM2903 Datasheet(PDF) 5 Page - 3PEAK INC.

Part No. LM2903
Description  36V Low Power Dual/Quad Differential Comparators
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Maker  3PEAK [3PEAK INC.]
Homepage  http://www.3peakic.com/
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LM2903 Datasheet(HTML) 5 Page - 3PEAK INC.

 
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5
LM2903/LM2901
36V Low Power Dual/Quad Differential Comparators
www.3peakic.com.cn
Rev. B
Pin Functions
–IN: Inverting Input of the Comparator Voltage
.
range of this pin can go from Vto V+ - 1.5V.
+IN: Non-Inverting Input of Comparator. This pin has
the same voltage range as
–IN.
V+ (VDD): Positive Power Supply. Typically the
voltage is from 2V to 36V. Split supplies are possible
as long as the voltage between V+ and V
– is
between 2V and 36V. A
bypass capacitor of 0.1μF as
close to the part as possible should be used between
supply
power
between
or
pins
and
pins
supply
ground.
V
– (VSS): Negative Power Supply. It is normally tied
to ground. It can also be tied to a voltage other than
ground as long as the voltage between V+ and Vis
from 2V to 36V. If it is not connected to ground,
bypass it with a capacitor
of 0.1μF as close to the
part as possible.
OUT:
Comparator
Output.
The
voltage
range
extends to within millivolts of each supply rail.
Operation
The
LM2903/LM2901
family
single-supply
comparators feature internal hysteresis, high speed,
and low power. Input signal range extends beyond
the negative and positive power supplies. The output
can even extend all the way to the negative supply.
The input stage is active over different ranges of
common mode input voltage. Rail-to-rail input voltage
range and low-voltage single-supply operation make
these devices ideal for portable equipment.
Applications Information
Inputs
The LM2903/2901 comparator family uses CMOS transistors at the input which prevent phase inversion when the
input pins exceed the supply voltages. Figure 1 shows an input voltage exceeding both supplies with no resulting
phase inversion.
Figure 1. Comparator Response to Input Voltage
The electrostatic discharge (ESD) protection input structure of two back-to-back diodes and 1
kΩ series resistors
are used to limit the differential input voltage applied to the precision input of the comparator by clamping input
-2
0
2
4
6
Time (100μs/div)
VDD=5V
Input Voltage
Output Voltage


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