LMV7251M5 National Semiconductor, LMV7251M5 Datasheet - Page 8

• Manufacturer Part Number: LMV7251M5
• Description: IC COMPARATOR 1.8V LO V SOT23-5
• Manufacturer: National Semiconductor
• Type: General Purposer

Specifications of LMV7251M5

• Number Of Elements: 1
• Output Type: CMOS, Push-Pull, Rail-to-Rail
• Voltage - Supply: 1.8 V ~ 5 V, ±0.9 V ~ 2.5 V
• Mounting Type: Surface Mount
• Package / Case: SC-74A, SOT-753
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: LMV7251M5TR

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Application Info
Input Stage
The LMV7251 and LMV7255 have rail-to-rail input stages.
The input common mode voltage range is from −100mV to
(V
Output Stage
The LMV7251 has a push-pull CMOS output stage. Large
push-pull output drivers allows rail-to-rail output swings with
load currents in the miliampere range.
The LMV7255 has a open drain CMOS output stage. This
requires an external pull-up resistor connected between the
positive supply voltage and the output. The external pull-up
resistor should be high enough resistance so to avoid exces-
sive power dissipation. In addition, the pull-up resistor
should be low enough resistance to enable the comparator
to switch with the load circuitry connected.
Power Supply Considerations
The LMV7251/LMV7255 are well suited for many battery-
powered applications. The LMV7251/LMV7255 can operate
from single power supply of +1.8V to +5V. The device typi-
cally consumes only 11µA with a 2.7V supply. With a high
power supply rejection ratio (PSRR) of 79 dB (typical), the
comparator is well suited for operating under conditions of a
decaying battery voltage.
CC
FIGURE 4. Inverting Configured Comparator —
+ 100mV).
LMV7255
(Continued)
DS200057-21
DS200057-20
8
Power supply decoupling is critical and improves stability.
Place decoupling capacitors 0.1µF as close as possible to
the V
capacitors 0.1µF on both the V
capacitors will help keep the comparator from oscillating
under various load conditions.
+
pin. For split supply applications, place decoupling
+
and V
−
pins. The decoupling